


Climatological Report (Monthly)
Issued by NWS Cheyenne, WY
Issued by NWS Cheyenne, WY
143 CXUS55 KCYS 020357 CLMCYS CLIMATE REPORT NATIONAL WEATHER SERVICE CHEYENNE WY 957 PM MDT WED OCT 01 2025 ................................... ...THE CHEYENNE WYOMING AIRPORT CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2025... CLIMATE NORMAL PERIOD 1991 TO 2020 CLIMATE RECORD PERIOD 1871 TO 2025 WEATHER OBSERVED NORMAL DEPART LAST YEAR`S VALUE DATE(S) VALUE FROM VALUE DATE(S) NORMAL ................................................................ TEMPERATURE (F) RECORD HIGH 97 09/07/2022 09/07/2022 LOW 8 09/30/1985 HIGHEST 86 09/10 71 15 89 LOWEST 39 09/06 44 -5 40 AVG. MAXIMUM 74.4 73.3 1.1 79.9 AVG. MINIMUM 47.8 45.8 2.0 48.2 MEAN 61.1 59.6 1.5 64.0 DAYS MAX >= 90 0 0.6 -0.6 0 DAYS MAX <= 32 0 0.1 -0.1 0 DAYS MIN <= 32 0 1.2 -1.2 0 DAYS MIN <= 0 0 0.0 0.0 0 PRECIPITATION (INCHES) RECORD MAXIMUM 6.95 2013 TOTALS 1.66 1.47 0.19 DAYS >= .01 12 7.3 4.7 1 DAYS >= .10 4 3.5 0.5 1 DAYS >= .50 1 1.1 -0.1 0 DAYS >= 1.00 0 0.2 -0.2 0 GREATEST 24 HR. TOTAL 0.96 09/22 TO 09/23 0.37 09/04 TO 09/04 SNOWFALL (INCHES) RECORDS TOTAL 11.8 MM 24 HR TOTAL 10.1 09/23/2000 TO 09/24/2000 TOTALS 0.0 1.0 -1.0 0.0 SINCE 7/1 T 1.0 -1.0 MM DAYS >= 1.0 0 0.3 -0.3 0 GREATEST SNOW DEPTH 0 0 24 HR TOTAL MM MM DEGREE DAYS HEATING TOTAL 125 196 -71 SINCE 7/1 146 246 -100 COOLING TOTAL 16 32 -16 SINCE 1/1 383 397 -14 ................................................................ WIND (MPH) AVERAGE WIND SPEED 9.1 HIGHEST WIND SPEED/DIRECTION 38/290 DATE 09/09 HIGHEST GUST SPEED/DIRECTION 54/290 DATE 09/09 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM AVERAGE SKY COVER 0.23 NUMBER OF DAYS FAIR 21 NUMBER OF DAYS PC 8 NUMBER OF DAYS CLOUDY 1 AVERAGE RH (PERCENT) 53 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 7 MIXED PRECIP 0 HEAVY RAIN 2 RAIN 4 LIGHT RAIN 14 FREEZING RAIN 0 LT FREEZING RAIN 0 HAIL 0 HEAVY SNOW 0 SNOW 0 LIGHT SNOW 0 SLEET 0 FOG 2 FOG W/VIS <= 1/4 MILE 0 HAZE 1 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$