143
CXUS55 KCYS 020357
CLMCYS

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
957 PM MDT WED OCT 01 2025

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...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.

$$