646
CDUS45 KRIW 270731
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
131 AM MDT MON APR 27 2026
...............................
..THE CASPER WY CLIMATE SUMMARY FOR APRIL 26 2026
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)
YESTERDAY
MAXIMUM 43 4:16 PM 80 1946 59 -16 73
1981
2012
MINIMUM 28 11:59 PM 17 1988 30 -2 33
2010
AVERAGE 36 44 -8
PRECIPITATION (IN)
YESTERDAY 0.19 1.18 2016 0.05 0.14 0.00
MONTH TO DATE 1.17 1.17 0.00 0.96
SINCE MAR 1 1.33 2.01 -0.68 2.29
SINCE JAN 1 1.87 3.06 -1.19 3.01
SNOWFALL (IN)
YESTERDAY MM 9.9 2016 0.3 MM 0.0
MONTH TO DATE 8.8 9.5 -0.7 7.7
SINCE MAR 1 10.4 19.8 -9.4 15.7
SINCE JUL 1 26.1 68.1 -42.0 26.2
SNOW DEPTH MM
DEGREE DAYS
HEATING
YESTERDAY 29 21 8 12
MONTH TO DATE 519 605 -86 623
SINCE MAR 1 1105 1512 -407 1472
SINCE JUL 1 5282 6874 -1592 6487
COOLING
YESTERDAY 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 31 HIGHEST WIND DIRECTION N (20)
HIGHEST GUST SPEED 40 HIGHEST GUST DIRECTION N (20)
AVERAGE WIND SPEED 12.5
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
LIGHT SNOW
FOG
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 5:00 PM
LOWEST 82 12:00 AM
AVERAGE 90
......................................................
THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 59 81 1952
1992
MINIMUM TEMPERATURE (F) 30 15 1984
SUNRISE AND SUNSET
APRIL 27 2026.........SUNRISE 6:05 AM MDT SUNSET 8:02 PM MDT
APRIL 28 2026.........SUNRISE 6:04 AM MDT SUNSET 8:03 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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