250
CDUS45 KRIW 220045
CLIRIW
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
645 PM MDT THU MAY 21 2026
...............................
..THE RIVERTON WY CLIMATE SUMMARY FOR MAY 21 2026
VALID TODAY AS OF 0600 PM LOCAL TIME.
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1995 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
TODAY
MAXIMUM 54 9:18 AM 86 2006 69 -15 64
MINIMUM 34 11:58 AM 28 2001 41 -7 32
AVERAGE 44 55 -11 48
PRECIPITATION (IN)
TODAY 0.29 0.55 2019 0.07 0.22 0.00
MONTH TO DATE 0.57 1.35 -0.78 1.09
SINCE MAR 1 1.14 3.20 -2.06 3.97
SINCE JAN 1 1.41 3.89 -2.48 4.47
SNOWFALL (IN)
TODAY MM 0.0
MONTH TO DATE 0.8 0.9
SINCE MAR 1 8.4 18.2
SINCE JUL 1 16.4 30.7
SNOW DEPTH MM
DEGREE DAYS
HEATING
TODAY 21 10 11 17
MONTH TO DATE 267 289 -22 264
SINCE MAR 1 1392 1848 -456 1754
SINCE JUL 1 5685 7726 -2041 7101
COOLING
TODAY 0 0 0 0
MONTH TO DATE 8 0 8 3
SINCE MAR 1 8 0 8 3
SINCE JAN 1 8 0 8 3
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 31 HIGHEST WIND DIRECTION N (10)
HIGHEST GUST SPEED 40 HIGHEST GUST DIRECTION N (340)
AVERAGE WIND SPEED 12.8
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
LIGHT SNOW
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100
LOWEST 45
AVERAGE 73
......................................................
THE RIVERTON WY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 69 82 2000
MINIMUM TEMPERATURE (F) 42 24 2022
SUNRISE AND SUNSET
MAY 21 2026...........SUNRISE 5:45 AM MDT SUNSET 8:37 PM MDT
MAY 22 2026...........SUNRISE 5:44 AM MDT SUNSET 8:38 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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