Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS45 KRIW 090728
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
128 AM MDT SAT MAY 09 2026
...................................
...THE CASPER WY CLIMATE SUMMARY FOR MAY 8 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 70 3:59 PM 84 1987 63 7 73
MINIMUM 39 4:48 AM 18 2010 34 5 41
AVERAGE 55 49 6
PRECIPITATION (IN)
YESTERDAY 0.01 1.66 1995 0.08 -0.07 0.00
MONTH TO DATE 0.25 0.54 -0.29 0.34
SINCE MAR 1 1.69 2.79 -1.10 3.26
SINCE JAN 1 2.23 3.84 -1.61 3.98
SNOWFALL (IN)
YESTERDAY 0.0 8.9 1979 0.1 -0.1 0.0
MONTH TO DATE T 1.2 -1.2 0.3
SINCE MAR 1 11.4 22.0 -10.6 16.0
SINCE JUL 1 27.1 70.3 -43.2 26.5
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 10 16 -6 8
MONTH TO DATE 138 142 -4 134
SINCE MAR 1 1344 1731 -387 1683
SINCE JUL 1 5521 7093 -1572 6698
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 21 HIGHEST WIND DIRECTION W (250)
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION NW (300)
AVERAGE WIND SPEED 9.7
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 1:00 AM
LOWEST 18 4:00 PM
AVERAGE 58
..........................................................
THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 64 83 1962
MINIMUM TEMPERATURE (F) 35 18 2002
SUNRISE AND SUNSET
MAY 9 2026...........SUNRISE 5:49 AM MDT SUNSET 8:16 PM MDT
MAY 10 2026...........SUNRISE 5:48 AM MDT SUNSET 8:17 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$