687
CDUS45 KRIW 310730
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
130 AM MDT SUN MAY 31 2026
...............................
..THE CASPER WY CLIMATE SUMMARY FOR MAY 30 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 73 2:58 PM 92 1984 73 0 77
MINIMUM 51 11:58 PM 29 2004 42 9 49
2006
2010
AVERAGE 62 57 5
PRECIPITATION (IN)
YESTERDAY T 1.15 1971 0.06 -0.06 0.00
MONTH TO DATE 1.67 2.14 -0.47 1.28
SINCE MAR 1 3.11 4.39 -1.28 4.20
SINCE JAN 1 3.65 5.44 -1.79 4.92
SNOWFALL (IN)
YESTERDAY 0.0 T 1989 0.0 0.0 0.0
MONTH TO DATE 2.5 2.6 -0.1 0.3
SINCE MAR 1 13.9 23.4 -9.5 16.0
SINCE JUL 1 29.6 71.7 -42.1 26.5
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 3 8 -5 2
MONTH TO DATE 359 402 -43 365
SINCE MAR 1 1565 1991 -426 1914
SINCE JUL 1 5742 7353 -1611 6929
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 1 0 1 0
SINCE MAR 1 1 0 1 0
SINCE JAN 1 1 0 1 0
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 29 HIGHEST WIND DIRECTION SW (210)
HIGHEST GUST SPEED 39 HIGHEST GUST DIRECTION S (200)
AVERAGE WIND SPEED 16.6
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 77 3:00 AM
LOWEST 23 2:00 PM
AVERAGE 50
......................................................
THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 73 91 2020
MINIMUM TEMPERATURE (F) 42 27 1979
SUNRISE AND SUNSET
MAY 31 2026...........SUNRISE 5:30 AM MDT SUNSET 8:37 PM MDT
JUNE 1 2026..........SUNRISE 5:30 AM MDT SUNSET 8:38 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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