290
CDUS45 KRIW 300727
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
127 AM MDT THU APR 30 2026
...............................
..THE CASPER WY CLIMATE SUMMARY FOR APRIL 29 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 55 4:11 PM 83 1992 60 -5 66
MINIMUM 22 5:08 AM 16 1990 31 -9 32
2019
AVERAGE 39 45 -6
PRECIPITATION (IN)
YESTERDAY 0.00 0.62 1997 0.06 -0.06 0.00
MONTH TO DATE 1.28 1.35 -0.07 1.18
SINCE MAR 1 1.44 2.19 -0.75 2.51
SINCE JAN 1 1.98 3.24 -1.26 3.23
SNOWFALL (IN)
YESTERDAY 0.0 3.8 1984 0.3 -0.3 0.0
MONTH TO DATE 9.8 10.3 -0.5 7.7
SINCE MAR 1 11.4 20.6 -9.2 15.7
SINCE JUL 1 27.1 68.9 -41.8 26.2
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 26 20 6 16
MONTH TO DATE 597 665 -68 677
SINCE MAR 1 1183 1572 -389 1526
SINCE JUL 1 5360 6934 -1574 6541
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 18 HIGHEST WIND DIRECTION N (20)
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION N (10)
AVERAGE WIND SPEED 7.3
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96 3:00 AM
LOWEST 31 5:00 PM
AVERAGE 64
......................................................
THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 60 84 1992
2021
MINIMUM TEMPERATURE (F) 31 18 1967
SUNRISE AND SUNSET
APRIL 30 2026.........SUNRISE 6:01 AM MDT SUNSET 8:06 PM MDT
MAY 1 2026...........SUNRISE 6:00 AM MDT SUNSET 8:07 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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