690
CXUS55 KRIW 291754
CLACPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1034 AM MST THU JAN 29 2026
..PRELIMINARY ANNUAL CLIMATE SUMMARY FOR CASPER FOR 2025
...10TH WARMEST YEAR AT 47.2F (1.6 DEGREES ABOVE NORMAL)
...26TH WARMEST SUMMER AT 68.5F (TIES 2022, 2002)
...40TH WETTEST YEAR WITH 12.05 INCHES (47TH DRIEST) (98.6% OF
NORMAL)
...1ST LEAST SNOW YEAR WITH 34.8 INCHES. 48.5% OF NORMAL. (1943 HAD
38 INCHES)
...3RD LEAST SNOWY SEASON WITH 42.4 INCHES. (2024-2025)
...HOT AND COLD MONTHS: 8TH WARMEST NOVEMBER AND 1ST WARMEST DECEMBER
...WET AND DRY MONTHS: 6TH DRIEST FEB AND 6TH WETTEST SEPTEMBER.
...HOT DAYS: FEB 2ND 57F, FEB 4TH 61 (T 1963), MAR 26TH 75F, MAR
27TH 76F, APR 11TH 80F (NEW RECORD FOR EARLIEST 80-DEGREE DAY), APR
12TH 77F, JUN 1ST 92F, JUL 9TH 100F, AUG 20TH 99F, NOV 16TH 67F (T
1999); DEC 11TH 60F, DEC 14TH 59F, DEC 15TH 59F, DEC 16TH 60F, DEC
19TH 59F, DEC 21ST 57F (T), DEC 22ND 61F, DEC 23RD 63F, DEC 24TH
63F, DEC 25TH 61F.
...COLD DAYS: JAN 20TH -25F, JUN 23RD 32F, AUG 9TH 39F, SEP 6TH 32F,
NOV 29TH -15F.
...WET DAYS: MAR 6TH 0.77”, AUG 27TH 0.44” SEP 16TH 1.24”, SEP 17TH
0.82”, SEP 23RD 0.38”.
...SNOWY DAYS: NO RECORD SNOW DAYS IN 2025.
...PEAK WIND: FEBRUARY 5TH 240/70 MPH. DECEMBER 17TH 290/78 MPH.
..THE CASPER WY CLIMATE SUMMARY FOR THE YEAR OF 2025
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1939 TO 2026
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..........................................................
TEMPERATURE (F)
RECORD
HIGH 104 07/29/2006
07/16/2005
07/12/1954
LOW -42 12/22/2022
HIGHEST 100 MM
LOWEST -25 MM
AVG. MAXIMUM 62.3 2.6
AVG. MINIMUM 32.0 0.5
MEAN 47.2
PRECIPITATION (INCHES)
RECORD
MAXIMUM 20.48 1994
MINIMUM 5.79 2020
TOTALS 12.05 12.22 -0.17
SNOWFALL (INCHES)
RECORDS
TOTAL 137.6 1982
TOTALS 34.8 71.8 -37.0
DEGREE DAYS
HEATING TOTAL 6841
COOLING TOTAL 467
..........................................................
WIND (MPH)
HIGHEST WIND SPEED/DIRECTION 58/250 DATE 12/19
HIGHEST GUST SPEED/DIRECTION 78/290 DATE 12/17
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 41 MIXED PRECIP 0
HEAVY RAIN 9 RAIN 12
LIGHT RAIN 101 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 1
HEAVY SNOW 3 SNOW 11
LIGHT SNOW 54 SLEET 0
FOG 91 FOG W/VIS <= 1/4 MILE 15
HAZE 42
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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