High pressure was the dominant feature across much of Colorado during the month of August 2015. This helped keep temperatures quite warm and while there were occasional storms, they failed to deliver much in the way of precipitation.
We started out the month very warm and dry. This was interrupted on the 9th when a series of disturbances finally brought some measurable precipitation. Dry weather returned for a few days but then a strong cold front moved bring much cooler temperatures from the 17th to the 19th. The break was short-lived and warmer mercury readings and drier conditions dominated the balance of the month.
Thornton’s average temperature for the month came in at 71.8 degrees, not far off Denver’s long term average for August of 72.5 degrees. Out at DIA where the Mile High City’s official readings are taken, it was much warmer with an average of 74.0 degrees.
Temperatures in Thornton ranged from a high of 98.1 degrees on the 15th down to a low of 45.3 degrees on the morning of the 19th. Denver’s maximum reading of 98 degrees came on the 15th as well and its lowest reading of 43 degrees came on the 23rd.
We saw 18 days with high temperature readings above the 90 degree mark. Denver saw one more than that.
Two daily high temperature records were tied in Denver during the month, those coming on the 18th and 26th with readings of 98 and 97 degrees respectively. Additionally, two mornings in a row fell to record lows. The record low temperature for the 18th (47 degrees) was tied and the following day a new record low of 47 degrees was set.
In terms of precipitation, a paltry 0.87 inches fell in Thornton’s rain bucket. Out at the airport, Denver recorded 1.18 inches. Both were well below Denver’s long term average of 1.69 inches for August.
Click here to view Thornton’s August 2015 climate report.
From the National Weather Service:
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
08/10 TO 08/11 08/31 TO 08/31
08/11 TO 08/11 08/31 TO 08/31
STORM TOTAL MM MM
(MM/DD(HH)) MM 08/26(00) TO 08/26(00)
08/31(00) TO 08/31(00)1
08/31(00) TO 08/31(00)1
SNOWFALL (INCHES)
RECORDS
TOTAL MM MM
TOTALS 0.0 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.