506
CXUS55 KBOU 011853
CLMDEN
CLIMATE REPORT
NATIONAL WEATHER SERVICE DENVER/BOULDER
1253 PM MDT WED OCT 01 2025
...............................
..THE DENVER CO CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2025
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1872 TO 2025
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
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TEMPERATURE (F)
RECORD
HIGH 101 09/05/2020
LOW 17 09/29/1985
HIGHEST 91 09/10 91 0 94 09/03
LOWEST 43 09/06 35 8 44 09/19
AVG. MAXIMUM 78.0 79.6 -1.6 85.5
AVG. MINIMUM 51.4 50.0 1.4 54.5
MEAN 64.7 64.8 -0.1 70.0
DAYS MAX >= 90 1 4.2 -3.2 9
DAYS MAX <= 32 0 0.0 0.0 0
DAYS MIN <= 32 0 0.7 -0.7 0
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 5.61 2013
MINIMUM T 1892
TOTALS 1.76 1.35 0.41 1.24
DAILY AVG. 0.06 0.04 0.02 0.04
DAYS >= .01 6 6.0 0.0 4
DAYS >= .10 2 2.7 -0.7 3
DAYS >= .50 1 0.6 0.4 1
DAYS >= 1.00 1 0.1 0.9 0
GREATEST
24 HR. TOTAL 1.28 09/23 TO 09/23 0.94 09/21 TO 09/22
STORM TOTAL 1.28 0.82
(MM/DD(HH)) MM
SNOWFALL (INCHES)
RECORDS
TOTAL MM MM
TOTALS 0.0 MM
DEGREE DAYS
HEATING TOTAL 61 105 -44 19
SINCE 7/1 61 119 -58 MM
COOLING TOTAL 61 99 -38 177
SINCE 1/1 838 842 -4 MM
FREEZE DATES
RECORD
EARLIEST 09/08/1962
LATEST 06/08/2007
EARLIEST MM
LATEST 04/29
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WIND (MPH)
AVERAGE WIND SPEED 8.8
RESULTANT WIND SPEED/DIRECTION 2/220
HIGHEST WIND SPEED/DIRECTION 35/250 DATE 09/09
35/360 09/22
HIGHEST GUST SPEED/DIRECTION 51/240 DATE 09/09
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 2
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 5 MIXED PRECIP 0
HEAVY RAIN 2 RAIN 2
LIGHT RAIN 11 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 3 FOG W/VIS <= 1/4 MILE 0
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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