442
CXUS55 KRIW 291743
CLARIW
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1034 AM MST THU JAN 29 2026
..PRELIMINARY ANNUAL CLIMATE SUMMARY FOR RIVERTON FOR 2025
...3RD WARMEST YEAR WITH 47.2 DEGREES (2.7 DEGREES ABOVE NORMAL)
(TIED WITH 2006)
...8TH HOTTEST AVERAGE SUMMER (JUN – AUG) WITH 70.2 DEGREES (TIED
2003)
...13TH WETTEST YEAR WITH 9.14 INCHES. (106.8% OF NORMAL)
...18TH SNOWIEST YEAR WITH 29.4 INCHES (8TH LEAST SNOW)
...2ND LEAST SNOWY SEASON WITH 30.7 INCHES (2024-2025) (T 2006)
...HOT AND COLD MONTHS: 4TH COLDEST JAN, 7TH WARMEST FEB, 8TH
WARMEST MAR, 10TH WARMEST JUN, 5TH WARMEST SEPTEMBER, 3RD WARMEST
NOVEMBER, AND 1ST WARMEST DECEMBER.
...WET AND DRY MONTHS: 4TH WETTEST JAN, 5TH DRIEST FEB, 3RD WETTEST
MAR, 10TH WETTEST JUN, 7TH WETTEST SEPTEMBER AND OCTOBER.
...HOT DAYS: FEB 24TH 59F, MAR 27TH 73F, APR 12TH 75F, MAY 10TH 81F
(T 2012), JUN 1ST 91F, JUN 19TH 95F, JUL 9TH 99F, AUG 7TH 95F, AUG
19TH 97F, AUG 20TH 99F, OCT 3RD 82F, NOV 2ND 71F (LATEST 70F DAY ON
RECORD, PREVIOUSLY NOV 1, 2014); NOV 11TH 65F; NOV 14TH 64F (T
2016); DEC 9TH 58F, DEC 10TH 56F; DEC 11TH 59 (T 2004); DEC 12TH
59F, DEC 16TH 62F, DEC 17TH 58F (T 2013), DEC 19TH 55F. DEC 21ST
52F, DEC 22ND 59F, DEC 23RD 57F, DEC 24TH 64F, DEC 25TH 55F, DEC
26TH 48F, AND DEC 27TH 45 (T 2005).
...COLD DAYS: JAN 19TH -14F, JAN 20TH -19F, JAN 26TH -11F, JUN 23RD
39F, AUG 3RD 50F, AND AUG 9TH 47F.
...WET DAYS: JAN 17TH 0.11”, JAN 18TH 0.03”, MAR 6TH 0.88”, MAR 14TH
0.16”, APR 17TH 0.25”, MAY 13TH 0.30”, JUN 5TH 0.34” (T 1999), AUG
27TH 0.40”, AUG 28TH 0.09 (T 2010), SEP 22ND 0.91”, AND OCT 5TH
0.78”.
...SNOWY DAYS: 5TH SNOWIEST JAN, JAN 17TH 1.6”, JAN 18TH 0.3” (T
2007), 4TH LEAST SNOW FEB, 2ND SNOWIEST MAR, MAR 6TH 7.3”, 6TH LEAST
SNOW APR, AND MAY 6TH 0.9”.
...PEAK WIND: AUGUST 15TH 200/68 MPH. DECEMBER 10TH 250/73 MPH.
..THE RIVERTON WY CLIMATE SUMMARY FOR THE YEAR OF 2025
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1995 TO 2026
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..........................................................
TEMPERATURE (F)
RECORD
HIGH 102 07/18/2006
07/15/2006
07/13/2005
LOW -31 12/22/2022
HIGHEST 99 MM
LOWEST -19 MM
AVG. MAXIMUM 60.8 2.8
AVG. MINIMUM 33.6 2.5
MEAN 47.2
PRECIPITATION (INCHES)
RECORD
MAXIMUM 14.97 2017
MINIMUM 2.87 2012
TOTALS 9.14 8.56 0.58
SNOWFALL (INCHES)
RECORDS
TOTAL 81.5 2023
TOTALS 29.4
DEGREE DAYS
HEATING TOTAL 6978
COOLING TOTAL 611
..........................................................
WIND (MPH)
HIGHEST WIND SPEED/DIRECTION 48/210 DATE 08/15
HIGHEST GUST SPEED/DIRECTION 73/250 DATE 12/10
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 26 MIXED PRECIP 0
HEAVY RAIN 4 RAIN 12
LIGHT RAIN 70 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 3 SNOW 12
LIGHT SNOW 40 SLEET 0
FOG 65 FOG W/VIS <= 1/4 MILE 20
HAZE 21
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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