479
CDUS45 KRIW 210045
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
645 PM MDT MON APR 20 2026
...............................
..THE CASPER WY CLIMATE SUMMARY FOR APRIL 20 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 79 3:43 PM 81 1962 57 22 58
1980
1989
MINIMUM 33 1:33 AM -2 1966 29 4 27
AVERAGE 56 43 13 43
PRECIPITATION (IN)
TODAY 0.00 1.82 1974 0.05 -0.05 T
MONTH TO DATE 0.78 0.86 -0.08 0.76
SINCE MAR 1 0.94 1.70 -0.76 2.09
SINCE JAN 1 1.48 2.75 -1.27 2.81
SNOWFALL (IN)
TODAY MM 0.4 MM 0.0
MONTH TO DATE 6.8 7.7 -0.9 7.7
SINCE MAR 1 8.4 18.0 -9.6 15.7
SINCE JUL 1 24.1 66.3 -42.2 26.2
SNOW DEPTH MM
DEGREE DAYS
HEATING
TODAY 9 22 -13 22
MONTH TO DATE 395 476 -81 495
SINCE MAR 1 981 1383 -402 1344
SINCE JUL 1 5158 6745 -1587 6359
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 32 HIGHEST WIND DIRECTION W (260)
HIGHEST GUST SPEED 42 HIGHEST GUST DIRECTION W (260)
AVERAGE WIND SPEED 15.0
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 59
LOWEST 8
AVERAGE 34
......................................................
THE CASPER WY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 57 83 1989
MINIMUM TEMPERATURE (F) 29 14 1973
SUNRISE AND SUNSET
APRIL 20 2026.........SUNRISE 6:16 AM MDT SUNSET 7:54 PM MDT
APRIL 21 2026.........SUNRISE 6:14 AM MDT SUNSET 7:55 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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