2009 Summer Season Climate Summary

Bismarck

In short, it was a very cool wet summer across the Bismarck area. Temperatures for the 2009 summer season (defined as the months of June-July-August) at the Bismarck airport only averaged 65.1 degrees, which was nearly three degrees below 1971 to 2000 climatological average.  This ties 1928 as being the 14th coolest in recorded history.  All three months during the season were below average. The most notable month was July, when the average temperature was only 66.9 degrees, which was 3.5 degrees below average. This ranked July of 2009 as being the 11th coolest on record.  No 100 degree temperatures were experienced during summer season at Bismarck. The last time no 100 degree temperatures were experienced during the summer season was in 1998. Furthermore, there were only 5 days during the season when the mercury topped 90 degrees. On average, this feat is achieved on about 18 days during the summer. The highest temperature recorded during the season was 98 degrees on the 12th of August. Conversely, the lowest temperature during the summer season was 35 degrees on both the 3rd and the 9th of June. 

Precipitation for the 2009 summer season at Bismarck airport was 11.67 inches which was 5.09 inches above the 1971 to 2000 average. Although this was not recording breaking precipitation, the figure below shows that this past summer was much wetter than what is typically experienced. This occurred in spite of the fact that August was dryer than average. A vast majority of the seasonal precipitation fell during June, when nearly 8 inches was reported. Additionally, there were 20 thunderstorm days reported this summer, with one instance of hail noted at the airport.

  ...THE BISMARCK ND CLIMATE SUMMARY FOR THE SEASON, FROM
6/1/2009 TO 8/31/2009...

CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1875 TO 2009

WEATHER         OBSERVED         NORMAL  DEPART  LAST YEAR`S
                 VALUE  DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                         NORMAL
...............................................................
TEMPERATURE (F)
RECORD
HIGH             114   07/06/1936
LOW               30   06/02/1969
HIGHEST            98   08/12        MM      MM   100  08/30
LOWEST             35   06/09        MM      MM    37  06/16
                        06/03
AVG. MAXIMUM     77.3              81.9    -4.6   82.5
AVG. MINIMUM     52.8              54.2    -1.4   54.7
MEAN             65.1              68.0    -2.9   68.6
DAYS MAX >= 90      5              18.4   -13.4     20
DAYS MAX <= 32      0               0.0     0.0      0
DAYS MIN <= 32      0               0.1    -0.1      0
DAYS MIN <= 0       0               0.0     0.0      0

PRECIPITATION (INCHES)
RECORD
MAXIMUM        14.22   2001
MINIMUM         7.89   2008
TOTALS          11.67              6.58    5.09    7.89

DAYS >= .01        27              28.2    -1.2      37
DAYS >= .10        18              14.9     3.1      21
DAYS >= .50         5               4.8     0.2       3
DAYS >= 1.00        4               1.2     2.8       1
GREATEST
24 HR. TOTAL    5.77


SNOWFALL (INCHES)
RECORDS
TOTAL              T   2008
TOTALS             TR              0.0

DEGREE_DAYS
HEATING TOTAL     214
COOLING TOTAL     245
...........................................................

WIND (MPH)
HIGHEST WIND SPEED/DIRECTION    41/320    DATE  06/26
HIGHEST GUST SPEED/DIRECTION    52/310    DATE  06/26

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   65
NUMBER OF DAYS FAIR           64
NUMBER OF DAYS PC             19
NUMBER OF DAYS CLOUDY          9

AVERAGE RH (PERCENT)     68

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             20     MIXED PRECIP              0
HEAVY RAIN                7     RAIN                     13
LIGHT RAIN               33     FREEZING RAIN             0
LT FREEZING RAIN          0     HAIL                      2
HEAVY SNOW                0     SNOW                      0
LIGHT SNOW                0     SLEET                     0
FOG                      32     FOG W/VIS <= 1/4 MILE     2
HAZE                      2

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.
...................................

 



 

 Williston

In short, it was a cool and wet summer across the Williston area. Temperatures for the 2009 summer season (defined as the months of June-July-August) at the Williston airport averaged 64.0 degrees which was in excess of 3 degrees below average. This ranked the 2009 summer season as being tied with 1899 for the 10th coolest summer in recorded history.  All three months during the season were below average. The most notable month was July, when the average temperature was only 65.9, which was 3.4 degrees below average. This ranked July of 2009 as being the 10th coolest on record.  Furthermore, the month of August proved to be tied for the 23rd coolest on record, with a monthly temperature of only 65.3 degrees.  With such a cool summer, it is really no surprise that no 100 degree temperatures were experienced at Williston. The last time no 100 degree temperatures were experienced during the summer season was in 2001. There were only 9 days during the season when the mercury topped 90 degrees. On average, this feat is achieved on about 20 days during the summer. The highest temperature recorded during the season was 98 degrees on the 12th of August. Conversely, the lowest temperature during the summer season was 30 degrees on the 2nd of June. 

 Precipitation for the 2009 summer season at Williston airport was 7.69 inches which was 1.57 inches above the 1971 to 2000 average. The Image below displays the summer season rainfall distribution at Williston. You can see that overall rainfall during the 2009 summer was in the above category. A majority of the rainfall occurred during the months of July and August, when 5.61 inches was measured. This made the month of July the 18th wettest July in recorded history. Similarly, August was the 23rd wettest month.  Additionally, there were 22 thunderstorm days reported this summer, with one instance of hail noted at the airport.

 ...THE WILLISTON ND CLIMATE SUMMARY FOR THE SEASON, FROM
6/1/2009 TO 8/31/2009...

CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1894 TO 2009

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH             110   07/05/1936
LOW               26   06/04/1998
HIGHEST            98   08/12        MM      MM      101  08/01
LOWEST             30   06/02        MM      MM       35  06/08
AVG. MAXIMUM     77.8              81.2    -3.4     82.4
AVG. MINIMUM     50.1              53.1    -3.0     52.7
MEAN             64.0              67.1    -3.1     67.5
DAYS MAX >= 90      9              19.8   -10.8       21
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      2               0.2     1.8        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
TOTALS           7.69              6.12    1.57     4.42

DAYS >= .01        32              27.6     4.4       27
DAYS >= .10        19              13.7     5.3       12
DAYS >= .50         5               3.4     1.6        1
DAYS >= 1.00        2               0.8     1.2        0
GREATEST
24 HR. TOTAL    1.40

SNOWFALL (INCHES)
RECORDS
TOTAL              T   2008
TOTALS            0.0                 T

DEGREE_DAYS
HEATING TOTAL     282
COOLING TOTAL     216
.................................................................

WIND (MPH)
HIGHEST WIND SPEED/DIRECTION    45/350    DATE  07/03
HIGHEST GUST SPEED/DIRECTION    56/360    DATE  07/03

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   65
NUMBER OF DAYS FAIR           64
NUMBER OF DAYS PC             23
NUMBER OF DAYS CLOUDY          5

AVERAGE RH (PERCENT)     64

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             22     MIXED PRECIP               0
HEAVY RAIN               12     RAIN                      16
LIGHT RAIN               39     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       3
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      27     FOG W/VIS <= 1/4 MILE      5
HAZE                      4

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.
...................................

 

 

Dickinson

Temperatures for the 2009 summer season (defined as the months of June-July-August) at the Dickinson airport averaged 61.8 degrees which was 5.6 degrees below the 1971 to 2000 climatological average of 67.4 degrees.  This ranked the 2009 summer season as being the 6th coolest summer in recorded history.  All three months during the season were well below average. The most notable months were June and July.  During these two months the average monthly temperatures were roughly 6 degrees below the 1971 to 2000 average. This led to the month of June to be the 14th coolest on record, while July the 6th coolest.  With such a cool summer, it is really no surprise that no 100 degree temperatures were experienced at Dickinson. The last time no 100 degree temperatures were experienced was in 2005. There were only 5 days during the season when the mercury topped 90 degrees. The highest temperature recorded during the season was 96 degrees on the 12th of August. Conversely, the lowest temperature during the summer season was 32 degrees on the 6th of June. 

Precipitation for the 2009 summer season at Dickinson airport was 7.18 inches which was 0.42 inches above the 1971 to 2000 average. The Image below displays the summer season rainfall distribution at Dickinson. In spite of the fact that rainfall was slightly above average, you can see that the overall rainfall during the 2009 summer season was well within the typical range of what can be expected.  This occurred in spite of the fact that rainfall was below average during August. Additionally, there were a total of 21 thunderstorm days during the season.

...THE DICKINSON ND CLIMATE SUMMARY FOR THE SEASON, FROM
6/1/2009 TO 8/31/2009...

CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1903 TO 2009

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH             114   07/06/1936
LOW               26   08/28/1911
HIGHEST            96   08/12        MM      MM      101  08/30
LOWEST             32   06/06        MM      MM       37  06/11
AVG. MAXIMUM     74.9              80.9    -6.0     82.1
AVG. MINIMUM     48.8              53.8    -5.0     51.8
MEAN             61.8              67.4    -5.6     67.0
DAYS MAX >= 90      5                MM      MM       MM
DAYS MAX <= 32      0                MM      MM       MM
DAYS MIN <= 32      1                MM      MM       MM
DAYS MIN <= 0       0                MM      MM       MM

PRECIPITATION (INCHES)
RECORD
MAXIMUM        10.97   2001
MINIMUM         5.14   2008
TOTALS           7.18              6.76    0.42     5.02

DAYS >= .01        30                MM      MM       MM
DAYS >= .10        17                MM      MM       MM
DAYS >= .50         5                MM      MM       MM
DAYS >= 1.00        1                MM      MM       MM
GREATEST
24 HR. TOTAL    1.31


SNOWFALL (INCHES)
RECORDS
TOTAL            0.0   2001
TOTALS            0.0                 T

DEGREE_DAYS
HEATING TOTAL     380
COOLING TOTAL     113
.................................................................

WIND (MPH)
HIGHEST WIND SPEED/DIRECTION    39/240    DATE  08/24
HIGHEST GUST SPEED/DIRECTION    53/250    DATE  08/24

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
NUMBER OF DAYS FAIR           64
NUMBER OF DAYS PC             23
NUMBER OF DAYS CLOUDY          4

AVERAGE RH (PERCENT)     71

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             21     MIXED PRECIP               0
HEAVY RAIN               10     RAIN                      13
LIGHT RAIN               34     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                1     SNOW                       1
LIGHT SNOW                1     SLEET                      0
FOG                      37     FOG W/VIS <= 1/4 MILE     13
HAZE                      7

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.
...................................

 

 

Minot

Temperatures for the 2009 summer season (defined as the months of June-July-August) at the Minot airport averaged 64.3 degrees which was 3.1 degrees below the 1971 to 2000 climatological average of 67.4 degrees.  This ranked the 2009 summer season as being the 21th coolest summer in recorded history.  All three months during the season were well below average. The most notable month was July, when the average monthly temperature was only 65.2 degrees, which was 4.4 degrees below the 1971 to 2000 average. This ranked the month as a tie for the 12th coolest July in recorded history.  There was one day during the summer when the max temperature hit 100 degrees.  This occurred on the 12th of August. However, in spite of this, there were only 3 days during the season when the mercury topped 90 degrees. The highest temperature recorded during the season was 100 degrees on the 12th of August. Conversely, the lowest temperature during the summer season was 36 degrees on the 5th of June. 

Precipitation for the 2009 summer season at Minot airport was 5.68 inches which was 1.87 inches below the 1971 to 2000 average. The Image below displays the summer season rainfall distribution at Minot. In spite of the fact that rainfall was near average during August, you can see that the overall rainfall during the 2009 summer season was below the typical range of what can be expected.  Additionally, there were a total of 13 thunderstorm days during the season.

...THE MINOT ND CLIMATE SUMMARY FOR THE SEASON, FROM
6/1/2009 TO 8/31/2009...

CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1905 TO 2009

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH             109   07/11/1936
                        06/20/1910
LOW               24   06/16/1915
HIGHEST           100   08/12        MM      MM       97  08/31
LOWEST             36   06/05        MM      MM       40  06/10
AVG. MAXIMUM     76.3              79.5    -3.2     78.9
AVG. MINIMUM     52.3              55.3    -3.0     53.5
MEAN             64.3              67.4    -3.1     66.2
DAYS MAX >= 90      3                MM      MM        9
DAYS MAX <= 32      0                MM      MM        0
DAYS MIN <= 32      0                MM      MM        0
DAYS MIN <= 0       0                MM      MM        0

PRECIPITATION (INCHES)
RECORD
MAXIMUM         9.83   2008
MINIMUM         5.17   2001
TOTALS           5.68              7.55   -1.87     9.83

DAYS >= .01        28                MM      MM       33
DAYS >= .10        14                MM      MM       19
DAYS >= .50         3                MM      MM        8
DAYS >= 1.00        0                MM      MM        1
GREATEST
24 HR. TOTAL    0.85

SNOWFALL (INCHES)
RECORDS
TOTAL            0.0   2001
TOTALS            0.0                 T

DEGREE_DAYS
HEATING TOTAL     253
COOLING TOTAL     214
.................................................................

WIND (MPH)
HIGHEST WIND SPEED/DIRECTION    39/290    DATE  06/27
HIGHEST GUST SPEED/DIRECTION    52/280    DATE  06/27

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
NUMBER OF DAYS FAIR           62
NUMBER OF DAYS PC             20
NUMBER OF DAYS CLOUDY          9

AVERAGE RH (PERCENT)     65

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             13     MIXED PRECIP               0
HEAVY RAIN               11     RAIN                      10
LIGHT RAIN               34     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      28     FOG W/VIS <= 1/4 MILE      4
HAZE                      7

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.
...................................

 

 

 

 

Jamestown

In short, it was a very cool and dry summer across the Jamestown area.  Temperatures for the 2009 summer season (defined as the months of June-July-August) at the Jamestown airport averaged 64.3 degrees which was 4.1 degrees below the 1971 to 2000 climatological average of 68.4 degrees.  This ranked the 2009 summer season as being the 13th coolest summer in recorded history.  All three months during the season were well below average, with each individual month falling within the top 21 coolest on record. The most notable month was July, when the average monthly temperature was only 65.9 degrees, which was 4.8 degrees below the 1971 to 2000 average. This ranked the month as a tie for the 13th coolest July in recorded history.  There were only 6 days during the season when the mercury topped 90 degrees. The highest temperature recorded during the season was 98 degrees on the 12th of August. Conversely, the lowest temperature during the summer season was 37 degrees on the 3rd of June. 

Precipitation for the 2009 summer season at Jamestown airport was only 3.82 inches which was 4.00 inches below the 1971 to 2000 average. The Image below displays the summer season rainfall distribution at Jamestown.  Rainfall was much below normal, with Jamestown experiencing their 3rd driest summer on record. Additionally, there were a total of 14 thunderstorm days during the season.

...THE JAMESTOWN ND CLIMATE SUMMARY FOR THE SEASON, FROM
6/1/2009 TO 8/31/2009...

CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1891 TO 2009

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH             118   07/06/1936
LOW               27   06/02/1910
HIGHEST            98   08/12        MM      MM       93  07/01
LOWEST             37   06/03        MM      MM       40  08/24
AVG. MAXIMUM     76.3              81.3    -5.0     78.1
AVG. MINIMUM     52.2              55.4    -3.2     54.1
MEAN             64.3              68.4    -4.1     66.1
DAYS MAX >= 90      6                MM      MM        3
DAYS MAX <= 32      0                MM      MM        0
DAYS MIN <= 32      0                MM      MM        0
DAYS MIN <= 0       0                MM      MM        0

PRECIPITATION (INCHES)
RECORD
MAXIMUM        12.71   2001
MINIMUM        11.35   2008
TOTALS           3.82              7.82   -4.00    11.35

DAYS >= .01        27                MM      MM       37
DAYS >= .10        13                MM      MM       20
DAYS >= .50         1                MM      MM        7
DAYS >= 1.00        0                MM      MM        2
GREATEST
24 HR. TOTAL    0.70

SNOWFALL (INCHES)
RECORDS
TOTAL            0.0   2001
TOTALS            0.0                 T

DEGREE_DAYS
HEATING TOTAL     264
COOLING TOTAL     219
.................................................................

WIND (MPH)
HIGHEST WIND SPEED/DIRECTION    36/280    DATE  06/27
HIGHEST GUST SPEED/DIRECTION    46/310    DATE  06/27

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
NUMBER OF DAYS FAIR           61
NUMBER OF DAYS PC             27
NUMBER OF DAYS CLOUDY          3

AVERAGE RH (PERCENT)     69

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             14     MIXED PRECIP               0
HEAVY RAIN                6     RAIN                      14
LIGHT RAIN               28     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      38     FOG W/VIS <= 1/4 MILE      5
HAZE                      3

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.
...................................

 



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