Climate Summary for the Month of July

 

 

 
CLIMATE REPORT
NATIONAL WEATHER SERVICE BOULDER, CO
210 AM MDT THU AUG 1 2013


...THE DENVER CO CLIMATE SUMMARY FOR THE MONTH OF JULY 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             105   07/20/2005
 LOW               42   07/04/1903
                        07/31/1873
HIGHEST           100   07/11       105      -5      102  07/21
LOWEST             55   07/02        42      13       57  07/26
AVG. MAXIMUM     88.2              89.4    -1.2     94.4
AVG. MINIMUM     60.4              58.9     1.5     63.4
MEAN             74.3              74.2     0.1     78.9
DAYS MAX >= 90     17              16.0     1.0       27
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               0.0     0.0        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         6.41   1965
 MINIMUM         0.01   1901
TOTALS           1.98              2.16   -0.18     0.48
DAILY AVG.       0.06              0.07   -0.01     0.02
DAYS >= .01         7               8.3    -1.3        6
DAYS >= .10         4               4.3    -0.3        2
DAYS >= .50         2               1.4     0.6        0
DAYS >= 1.00        0               0.7    -0.7        0
GREATEST
 24 HR. TOTAL    0.87   07/15 TO 07/15           07/06 TO 07/07
                        07/14 TO 07/15                    07/31 TO 07/31
                        07/15 TO 07/15                    07/31 TO 07/31
 STORM TOTAL       MM                                 MM
 (MM/DD(HH))            MM                    07/07(00) TO 07/07(00)
                                                 07/31(00) TO 07/31(00)1
                                                 07/31(00) TO 07/31(00)1

SNOWFALL (INCHES)
RECORDS
 TOTAL             MM   MM
TOTALS            0.0               0.0

DEGREE_DAYS
HEATING TOTAL       0                 6      -6        0
 SINCE 7/1          0                 6      -6        0
COOLING TOTAL     295               289       6      438
 SINCE 1/1        558               444     114      803

FREEZE DATES
RECORD
 EARLIEST     09/08/1962
 LATEST       06/08/2007
EARLIEST                        10/07
LATEST                          05/05
..................................................

WIND (MPH)
AVERAGE WIND SPEED              10.3
RESULTANT WIND SPEED/DIRECTION   3/163
HIGHEST WIND SPEED/DIRECTION    45/050    DATE  07/20
HIGHEST GUST SPEED/DIRECTION    58/040    DATE  07/20

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            5
NUMBER OF DAYS PC             24
NUMBER OF DAYS CLOUDY          2

AVERAGE RH (PERCENT)     50

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       3
LIGHT RAIN               13     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       6     FOG W/VIS <= 1/4 MILE      1
HAZE                     13

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


......JULY 2013 NEAR NORMAL TEMPERATURES AND PRECIPITATION......

DURING THE FIRST FEW DAYS OF JULY...A LARGE UPPER LEVEL RIDGE OF
HIGH PRESSURE WAS CENTERED OVER NEVADA...WITH A NORTHERLY FLOW ALOFT
OVER COLORADO. THIS PATTERN BROUGHT BELOW NORMAL TEMPERATURES TO
DENVER THE FIRST COUPLE OF DAYS OF THE MONTH WITH SOME LIGHT
PRECIPITATION ON THE FIRST. THE UPPER RIDGE THEN BUILT OVER THE
ROCKY MOUNTAIN REGION WHICH BROUGHT ABOVE NORMAL TEMPERATURES TO
DENVER FROM THE 3RD THROUGH THE 13TH. TEN OUT OF ELEVEN DAYS DURING
THIS PERIOD HAD TEMPERATURES IN THE 90S. ON THE 11TH...THE HIGH
TEMPERATURE REACHED 100 DEGREES WHICH WAS THE HOTTEST DAY OF THE
MONTH. FROM THE 12TH THROUGH THE 16TH...A VERY UNUSUAL WEATHER
PATTERN DEVELOPED OVER THE U.S...WITH AN UPPER LEVEL LOW PRESSURE
SYSTEM TRACKING FROM WEST VIRGINIA TO SOUTHERN NEW MEXICO. THIS
SYSTEM BROUGHT COOLER AND VERY MOIST AIR INTO THE REGION FROM THE
14TH THROUGH THE 16TH. ON THE 14TH...STRONG THUNDERSTORMS MOVED
ACROSS PARTS OF METRO DENVER...WITH OVER THREE INCHES OF RAIN
FALLING      IN WHEATRIDGE. HOWEVER...DENVER INTERNATIONAL AIRPORT
ONLY RECEIVED A TRACE. ON THE 15TH...A THUNDERSTORM PRODUCED 0.87
INCHES OF RAIN AT THE AIRPORT WHICH IS THE GREATEST ONE DAY RAINFALL
FOR THE MONTH.

.WARMER AND DRIER WEATHER RETURNED TO NORTH CENTRAL AND
NORTHEASTERN COLORADO ON THE 17TH...AS UPPER LEVEL HIGH PRESSURE
REBUILT OVER THE REGION. ABOVE NORMAL TEMPERATURES CONTINUED THROUGH
THE 23RD WITH THE EXCEPTION OF THE 18TH...WHEN A COLD FRONT MOVED
ACROSS NORTHEASTERN COLORADO. MOISTURE BEGIN TO INCREASE ACROSS
NORTHEASTERN COLORADO ON THE 25TH...WITH A GRADUAL COOLING TREND
THROUGH THE 28TH. THIS WAS DUE TO MONSOONAL MOISTURE CIRCULATING
AROUND A BROAD UPPER LEVEL HIGH PRESSURE SYSTEM OVER THE SOUTHERN
TIER OF THE UNITED STATES...AND UPSLOPE FLOW BEHIND A WEAK COLD
FRONT WHICH MOVED ACROSS NORTHEASTERN COLORADO ON THE 25TH. FROM THE
27TH THROUGH THE 29TH...THE TEMPERATURE AT DENVER INTERNATIONAL
AIRPORT DID NOT REACH THE 80 DEGREE MARK. THE LAST TIME THERE WERE
THREE CONSECUTIVE DAYS BELOW 80 DEGREES IN JULY WAS BACK IN 2009
FROM JULY 28TH THROUGH THE 30TH. A WARMING TREND RETURNED TO NORTH
CENTRAL AND NORTHEASTERN COLORADO THE LAST COUPLE DAYS OF THE
MONTH...AS DRIER AIR MOVED INTO COLORADO FROM THE WEST.

TEMPERATURES:

THE AVERAGE TEMPERATURE FOR THE MONTH OF JULY WAS 74.3 DEGREES F
WHICH WAS 0.1 DEGREES ABOVE NORMAL. JULY OF 2012 WAS THE WARMEST
JULY ON RECORD WITH AN AVERAGE TEMPERATURE OF 78.9 DEGREES F...WHICH
IS ALSO THE WARMEST MONTH EVER RECORDED IN DENVER. THE COLDEST JULY
ON RECORD WAS 67.4 WAY BACK IN 1895.

THERE WERE 17 DAYS IN WHICH THE MAXIMUM TEMPERATURE EXCEEDED 90
DEGREES...AND NO DAYS IN WHICH THE DAYTIME HIGH TEMPERATURE DID NOT
EXCEED 32 DEGREES F. THE HIGHEST TEMPERATURE OF THE MONTH WAS 100
DEGREES WHICH OCCURRED ON THE 11TH AND THE COLDEST TEMPERATURE OF
THE MONTH WAS 55 DEGREES ON THE MORNING OF THE 2ND.

THERE WERE NO TEMPERATURE RECORDS SET DURING THE MONTH.

PRECIPITATION:

PRECIPITATION FOR THE MONTH OF JULY WAS 1.98 INCHES...WHICH IS 0.18
INCHES BELOW THE NORMAL 0F 2.16 INCHES. THE WETTEST JULY ON RECORD
OCCURRED BACK IN 1965 WHEN 6.41 INCHES OF PRECIPITATION WAS
RECORDED. THE DRIEST JULY ON RECORD OCCURRED WAY BACK IN 1901...WHEN
ONLY 0.01 INCHES OF PRECIPITATION WAS RECORDED.

13 THUNDERSTORMS WERE OBSERVED AT DENVER INTERNATIONAL AIRPORT
DURING THE MONTH. THERE WERE ONE DAY WITH DENSE FOG WITH A
VISIBILITY AT OR BELOW 1/4 MILE DURING THE MONTH. A PEAK WIND OF 58
MPH FROM A NORTHEASTERLY DIRECTION WAS RECORDED ON THE 20TH.

 



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