099
CDUS45 KRIW 120732
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
132 AM MDT TUE MAY 12 2026
...............................
..THE CASPER WY CLIMATE SUMMARY FOR MAY 11 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 85R 3:49 PM 83 1940 65 20 82
MINIMUM 37 2:30 AM 17 1968 35 2 47
AVERAGE 61 50 11
PRECIPITATION (IN)
YESTERDAY 0.00 0.87 2005 0.08 -0.08 T
MONTH TO DATE 0.32 0.76 -0.44 0.34
SINCE MAR 1 1.76 3.01 -1.25 3.26
SINCE JAN 1 2.30 4.06 -1.76 3.98
SNOWFALL (IN)
YESTERDAY 0.0 4.2 2002 0.1 -0.1 0.0
MONTH TO DATE T 1.6 -1.6 0.3
SINCE MAR 1 11.4 22.4 -11.0 16.0
SINCE JUL 1 27.1 70.7 -43.6 26.5
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 4 15 -11 0
MONTH TO DATE 169 189 -20 147
SINCE MAR 1 1375 1778 -403 1696
SINCE JUL 1 5552 7140 -1588 6711
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 29 HIGHEST WIND DIRECTION W (260)
HIGHEST GUST SPEED 39 HIGHEST GUST DIRECTION W (260)
AVERAGE WIND SPEED 15.1
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 76 2:00 AM
LOWEST 8 1:00 PM
AVERAGE 42
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THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 65 87 1960
MINIMUM TEMPERATURE (F) 36 16 1953
SUNRISE AND SUNSET
MAY 12 2026...........SUNRISE 5:46 AM MDT SUNSET 8:19 PM MDT
MAY 13 2026...........SUNRISE 5:45 AM MDT SUNSET 8:20 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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