CLIMATE REPORT
NATIONAL WEATHER SERVICE BOULDER, CO
244 AM MDT TUE SEP 1 2015
...................................
...THE DENVER CO CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2015...
CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1872 TO 2015
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH 105 08/08/1878
LOW 40 08/26/1910
08/25/1910
08/24/1910
HIGHEST 98 08/15 105 -7 91 08/19
08/17
LOWEST 43 08/23 40 3 52 08/31
08/30
08/25
AVG. MAXIMUM 89.8 87.2 2.6 83.8
AVG. MINIMUM 58.3 57.9 0.4 57.4
MEAN 74.0 72.5 1.5 70.6
DAYS MAX >= 90 19 11.5 7.5 4
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 5.85 1979
MINIMUM 0.02 1924
TOTALS 1.18 1.69 -0.51 2.73
DAILY AVG. 0.04 0.05 -0.01 0.09
DAYS >= .01 9 8.6 0.4 13
DAYS >= .10 4 4.3 -0.3 5
DAYS >= .50 1 1.2 -0.2 3
DAYS >= 1.00 0 0.3 -0.3 0
GREATEST
24 HR. TOTAL 0.68 08/11 TO 08/11 08/25 TO 08/26
SNOWFALL (INCHES)
RECORDS
TOTAL 0.0
TOTALS 0.0
DEGREE_DAYS
HEATING TOTAL 13 10 3 2
SINCE 7/1 18 16 2 7
COOLING TOTAL 304 244 60 182
SINCE 1/1 713 688 25 613
FREEZE DATES
RECORD
EARLIEST 09/08/1962
LATEST 06/08/2007
EARLIEST 10/07
LATEST 05/05
..................................................
WIND (MPH)
AVERAGE WIND SPEED 9.6
RESULTANT WIND SPEED/DIRECTION 3/189
HIGHEST WIND SPEED/DIRECTION 38/260 DATE 08/31
HIGHEST GUST SPEED/DIRECTION 47/340 DATE 08/09
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.50
NUMBER OF DAYS FAIR 6
NUMBER OF DAYS PC 23
NUMBER OF DAYS CLOUDY 2
AVERAGE RH (PERCENT) 45
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 15 MIXED PRECIP 0
HEAVY RAIN 1 RAIN 4
LIGHT RAIN 12 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 5
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 4 FOG W/VIS <= 1/4 MILE 0
HAZE 8
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
.....AUGUST 2015 WARMER AND MUCH DRIER.....
UPPER LEVEL HIGH PRESSURE DOMINATED THE ROCKY MOUNTAIN REGION FOR
MOST OF AUGUST...WHICH RESULTED IN VERY WARM AND DRY WEATHER ACROSS
MUCH OF NORTHEASTERN COLORADO. NOT MUCH IN THE WAY OF HEAVY RAIN
OCCURRED DURING THE MONTH. HOWEVER...ON THE AFTERNOON OF THE
10TH...THUNDERSTORMS WITH VERY HEAVY RAIN AND HAIL DEVELOPED OVER
SOUTHERN SECTIONS OF METRO DENVER...PRODUCING FLOODING OVER SECTIONS
OF PARKER AND CENTENNIAL. THE ONLY NOTEWORTHY PATTERN CHANGE
OCCURRED AROUND THE MIDDLE OF THE MONTH...AS A STRONG UPPER LEVEL
TROUGH OF LOW PRESSURE MOVED ACROSS THE CENTRAL AND NORTHERN ROCKIES
INTO THE CENTRAL AND NORTHERN GREAT PLAINS STATES. A STRONG COLD
FRONT ASSOCIATED WITH THIS SYSTEM PRODUCED SOME SEVERE WEATHER
ACROSS PORTIONS OF NORTHEASTERN COLORADO AND THE PALMER DIVIDE ON
THE 17TH. THIS SYSTEM ALSO BROUGHT MUCH COOLER TEMPERATURES TO NORTH
CENTRAL AND NORTHEASTERN COLORADO FROM THE 17TH THROUGH THE 19TH.
VERY WARM TEMPERATURES RETURNED TO NORTHEASTERN COLORADO ON THE
21ST...AND CONTINUED THROUGH THE END OF THE MONTH...AS UPPER LEVEL
HIGH PRESSURE REBUILT OVER THE SOUTHWESTERN STATES AND SOUTHERN
ROCKIES.
TEMPERATURES:
THE AVERAGE TEMPERATURE AT DENVER INTERNATIONAL AIRPORT FOR THE
MONTH OF AUGUST WAS 89.8 DEGREES F WHICH WAS 2.6 DEGREES ABOVE
NORMAL. AUGUST OF 2011 WAS THE WARMEST AUGUST ON RECORD...WITH AN
AVERAGE TEMPERATURE OF 77.0 DEGREES F. THERE WERE 19 DAYS DURING THE
MONTH IN WHICH THE TEMPERATURE REACHED OR EXCEEDED THE 90 DEGREE
MARK...AND NO DAYS AT OR ABOVE 100 DEGREES. THE COLDEST AUGUST ON
RECORD WAS 66.5 DEGREES F BACK IN 1915. THE HIGHEST TEMPERATURE OF
THE MONTH WAS 98 DEGREES WHICH OCCURRED ON THE 15TH. THE COLDEST
TEMPERATURE OF THE MONTH WAS 43 DEGREES ON THE MORNING OF THE 23RD
AND 19TH. HIGH TEMPERATURE RECORDS WERE EQUALED ON BOTH THE 15TH AND
THE 26TH WITH TEMPERATURES OF 98 AND 97 DEGREES RESPECTIVELY.
PRECIPITATION:
PRECIPITATION FOR THE MONTH OF AUGUST AT DENVER INTERNATIONAL
AIRPORT WAS 1.18 INCHES...WHICH IS 0.51 INCHES BELOW THE NORMAL OF
1.69 INCHES. THERE WERE 9 DAYS WITH MEASURABLE PRECIPITATION. ON
THE 11TH...0.68 INCHES OF PRECIPITATION FELL WHICH IS THE GREATEST
DAILY AMOUNT FOR THE MONTH.
TEN WETTEST AUGUST`S IN DENVER WEATHER HISTORY SINCE 1872:
5.85 INCHES 1979
4.47 INCHES 1951
4.03 INCHES 2008
3.87 INCHES 1923
3.69 INCHES 1991
3.52 INCHES 1997
3.49 INCHES 1921
3.37 INCHES 1999
3.22 INCHES 1936
3.20 INCHES 1984
10 DRIEST AUGUST`S IN DENVER WEATHER HISTORY SINCE 1872:
0.02 INCHES 1924
0.05 INCHES 1917...1900
0.06 INCHES 1960
0.11 INCHES 2012
0.16 INCHES 1974
0.19 INCHES 1948
0.23 INCHES 1907
0.25 INCHES 1959
0.26 INCHES 1978
THERE WERE 15 DAYS IN WHICH THUNDER WAS OBSERVED AT DENVER
INTERNATIONAL AND 5 DAYS WITH HAIL. THERE WERE NO DAYS WITH DENSE
FOG WITH A VISIBILITY AT OR BELOW 1/4 MILE DURING THE MONTH BUT
THERE WERE 8 DAYS REPORTED WITH HAZE OR SMOKE. THE PEAK WIND FOR THE
MONTH WAS 47 MPH FROM THE NORTH/NORTHWEST WHICH OCCURRED ON THE 9TH.
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