January 2013 Climate Summary for Denver

 

CLIMATE REPORT
NATIONAL WEATHER SERVICE BOULDER, CO
721 AM MST FRI FEB 1 2013
 
                       ...JANUARY 2013...
   ...SLIGHTLY BELOW NORMAL TEMPERATURES AND PRECIPITATION...
 
JANUARY 2013 STARTED OUT COLD AND DRY...WITH THE FIRST THREE DAYS OF THE MONTH BEING 9.3 DEGREES BELOW NORMAL. ABOVE NORMAL TEMPERATURES RETURNED ON THE 7TH AND CONTINUED THROUGH THE 10TH. THE WEATHER TURNED SHARPLY COLDER ON THE 11TH AS AN UPPER LEVEL TROUGH OF LOW PRESSURE AND ASSOCIATED ARCTIC COLD FRONT MOVED INTO COLORADO. FOR A THREE DAY PERIOD FROM THE 12TH THROUGH THE 14TH...THE HIGH TEMPERATURE DID NOT REACH THE TEENS WITH OVERNIGHT LOWS BELOW ZERO.

 

IN ADDITION TO THE COLD TEMPERATURES...1.4 INCHES OF SNOW FELL AT DENVER INTERNATIONAL AIRPORT FROM THE 11TH THROUGH THE 14TH. MUCH ABOVE NORMAL TEMPERATURES RETURNED TO DENVER ON THE 16TH AND CONTINUED THROUGH THE 28TH AS UPPER LEVEL HIGH PRESSURE TOOK HOLD OF THE REGION. DURING THIS PERIOD...THE HIGH TEMPERATURE AT DENVER INTERNATIONAL AIRPORT EXCEEDED 60 DEGREES THREE TIMES WITH THE MAXIMUM TEMPERATURE OF 66 DEGREES ON THE 24TH BEING THE WARMEST DAY OF THE MONTH. ON THE 28TH...A WEAK UPPER LEVEL STORM SYSTEM MOVED INTO COLORADO FROM THE SOUTHWEST PRODUCING LIGHT RAIN ACROSS MUCH OF NORTHEASTERN COLORADO. COLDER UNSETTLED WEATHER RETURNED TO DENVER ON THE 28TH...AS AN UPPER LEVEL TROUGH OF LOW PRESSURE AND ASSOCIATED COLD FRONT MOVED INTO THE STATE. 3.3 INCHES OF SNOW FELL AT DENVER INTERNATIONAL AIRPORT FROM THE EVENING OF THE 28TH THROUGH THE MORNING OF THE 29TH.

 
TEMPERATURES:
 
THE AVERAGE TEMPERATURE FOR THE MONTH OF JANUARY WAS 30.3 DEGREES F WHICH WAS 0.4 DEGREES BELOW NORMAL. JANUARY OF 1986 IS THE WARMEST JANUARY ON RECORD WITH AN AVERAGE TEMPERATURE OF 40.3 DEGREES F. THE COLDEST JANUARY ON RECORD (16.9 DEGREES F) OCCURRED BACK IN 1930.
 
THERE WERE NO DAYS IN WHICH THE MAXIMUM TEMPERATURE EXCEEDED 90 DEGREES. THERE WERE 6 DAYS IN WHICH THE DAYTIME HIGH TEMPERATURE DID NOT EXCEED 32 DEGREES F AND 4 DAYS WITH LOW TEMPERATURES AT OR BELOW ZERO DEGREES F. THE HIGHEST TEMPERATURE OF THE MONTH WAS 66 DEGREES WHICH OCCURRED ON THE 24TH. THE COLDEST TEMPERATURE OF THE MONTH WAS 12 DEGREES BELOW ZERO ON THE MORNING OF THE 12TH.
 
PRECIPITATION:
 
PRECIPITATION FOR THE MONTH OF JANUARY WAS 0.31 INCHES...WHICH IS 0.10 INCHES BELOW THE NORMAL 0F 0.41 INCHES. THE WETTEST JANUARY ON RECORD OCCURRED WAY BACK IN 1883 WHEN 2.35 INCHES OF PRECIPITATION WAS RECORDED. THE DRIEST JANUARY ON RECORD OCCURRED BACK IN 1952 AN OTHER YEARS.
 
4.6 INCHES OF SNOW WAS RECORDED DURING THE MONTH...WHICH IS 2.4 INCHES BELOW THE NORMAL OF 7.0 INCHES. THE SNOWIEST JANUARY ON
RECORD OCCURRED BACK IN 1992 WHEN 24.3 INCHES OF SNOW FELL. THE LEAST SNOWIEST JANUARY ON RECORD OCCURRED BACK IN 1934 AND AGAIN IN 2003. ON THOSE YEARS...ONLY A TRACE OF SNOW WAS RECORDED AT DENVER.
 
THERE WERE NO THUNDERSTORMS OBSERVED AT DENVER INTERNATIONAL AIRPORT. THERE WERE TWO DAYS WITH DENSE FOG WITH A VISIBILITY AT OR BELOW 1/4 MILE DURING THE MONTH. A PEAK WIND OF 45 MPH FROM A WESTERLY DIRECTION WAS RECORDED ON THE 24TH.
 
...THE DENVER CLIMATE SUMMARY FOR THE MONTH OF JANUARY 2013...
 
CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1872 TO 2013
 
WEATHER         OBSERVED          NORMAL DEPART LAST YEAR`S
                 VALUE   DATE(S) VALUE   FROM    VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              76   01/27/1888
 LOW              -29   01/09/1875
HIGHEST            66   01/24        76     -10       66 01/21
LOWEST            -12   01/12       -29      17       -6 01/11
AVG. MAXIMUM     44.6              44.0     0.6     50.3
AVG. MINIMUM     16.0              17.4    -1.4     21.6
MEAN             30.3              30.7    -0.4     36.0
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      6               5.5     0.5        1
DAYS MIN <= 32     30              29.4     0.6       28
DAYS MIN <= 0       5               1.7     3.3        2
 
PRECIPITATION (INCHES)
RECORD
 MAXIMUM         2.35   1883
 MINIMUM         0.01   1933
                        1934
                        1952
TOTALS           0.31              0.41   -0.10     0.26
DAILY AVG.       0.01              0.01    0.00     0.01
DAYS >= .01         4               4.1    -0.1        4
DAYS >= .10         1               0.9     0.1        1
DAYS >= .50         0               0.0     0.0        0
DAYS >= 1.00        0               0.0     0.0        0
GREATEST
 24 HR. TOTAL    0.22   01/28 TO 01/29
 
SNOWFALL (INCHES)
RECORDS
 TOTAL           24.3   1992
TOTALS            4.6               7.0
 
DEGREE_DAYS
HEATING TOTAL    1067              1063       4      891
 SINCE 7/1       3300              3531    -231     3325
COOLING TOTAL       0                 0       0        0
 SINCE 1/1          0                 0       0        0
 
FREEZE DATES
RECORD
 EARLIEST     09/08/1962
 LATEST       06/08/2007
EARLIEST                        10/07
LATEST                          05/05
..................................................
 
WIND (MPH)
AVERAGE WIND SPEED              8.8
RESULTANT WIND SPEED/DIRECTION   4/205
HIGHEST WIND SPEED/DIRECTION    38/290    DATE 01/24
HIGHEST GUST SPEED/DIRECTION    45/290    DATE 01/24
 
SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR            8
NUMBER OF DAYS PC             20
NUMBER OF DAYS CLOUDY          3
 
AVERAGE RH (PERCENT)     48
 
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                1     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                1     SNOW                       1
LIGHT SNOW                5     SLEET                      0
FOG                       7     FOG W/VIS <= 1/4 MILE      2
HAZE                      7
 
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.

T INDICATES TRACE AMOUNT.

JK/KTF



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