503
CDUS45 KRIW 190046
CLIRIW
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
646 PM MDT MON MAY 18 2026
...............................
..THE RIVERTON WY CLIMATE SUMMARY FOR MAY 18 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 42 4:54 PM 87 2009 68 -26 63
MINIMUM 30R 6:10 AM 32 2017 40 -10 43
AVERAGE 36 54 -18 53
PRECIPITATION (IN)
TODAY 0.04 0.74 2017 0.07 -0.03 0.10
MONTH TO DATE 0.28 1.15 -0.87 0.97
SINCE MAR 1 0.85 3.00 -2.15 3.85
SINCE JAN 1 1.12 3.69 -2.57 4.35
SNOWFALL (IN)
TODAY MM 0.0
MONTH TO DATE 0.5 0.9
SINCE MAR 1 8.1 18.2
SINCE JUL 1 16.1 30.7
SNOW DEPTH MM
DEGREE DAYS
HEATING
TODAY 29 11 18 12
MONTH TO DATE 207 258 -51 214
SINCE MAR 1 1332 1817 -485 1704
SINCE JUL 1 5625 7695 -2070 7051
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 30 HIGHEST WIND DIRECTION N (10)
HIGHEST GUST SPEED 38 HIGHEST GUST DIRECTION N (10)
AVERAGE WIND SPEED 18.9
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT SNOW
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 92
LOWEST 50
AVERAGE 71
......................................................
THE RIVERTON WY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 68 89 2009
MINIMUM TEMPERATURE (F) 41 31 2003
2019
SUNRISE AND SUNSET
MAY 18 2026...........SUNRISE 5:47 AM MDT SUNSET 8:34 PM MDT
MAY 19 2026...........SUNRISE 5:46 AM MDT SUNSET 8:35 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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