878
CDUS45 KRIW 180045
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
645 PM MDT FRI APR 17 2026
...............................
..THE CASPER WY CLIMATE SUMMARY FOR APRIL 17 2026
VALID TODAY AS OF 0600 PM LOCAL TIME.
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1939 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
TODAY
MAXIMUM 38 4:59 PM 81 1994 56 -18 46
MINIMUM 24 7:32 AM 15 1945 28 -4 24
AVERAGE 31 42 -11 35
PRECIPITATION (IN)
TODAY 0.12 0.64 1986 0.05 0.07 0.38
MONTH TO DATE 0.78 0.72 0.06 0.67
SINCE MAR 1 0.94 1.56 -0.62 2.00
SINCE JAN 1 1.48 2.61 -1.13 2.72
SNOWFALL (IN)
TODAY MM 0.3 MM 3.0
MONTH TO DATE 5.3 6.6 -1.3 6.7
SINCE MAR 1 6.9 16.9 -10.0 14.7
SINCE JUL 1 22.6 65.2 -42.6 25.2
SNOW DEPTH MM
DEGREE DAYS
HEATING
TODAY 34 23 11 30
MONTH TO DATE 343 409 -66 400
SINCE MAR 1 929 1316 -387 1249
SINCE JUL 1 5106 6678 -1572 6264
COOLING
TODAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE MAR 1 0 0 0 0
SINCE JAN 1 0 0 0 0
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION W (260)
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION W (270)
AVERAGE WIND SPEED 8.5
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT SNOW
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100
LOWEST 42
AVERAGE 71
......................................................
THE CASPER WY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 57 80 1946
2001
MINIMUM TEMPERATURE (F) 28 4 2013
SUNRISE AND SUNSET
APRIL 17 2026.........SUNRISE 6:21 AM MDT SUNSET 7:51 PM MDT
APRIL 18 2026.........SUNRISE 6:19 AM MDT SUNSET 7:52 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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