301
CDUS45 KRIW 180728
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
128 AM MDT TUE AUG 18 2026
...............................
..THE CASPER WY CLIMATE SUMMARY FOR AUGUST 17 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 88 1:53 PM 97 2013 87 1 88
2020
MINIMUM 53 5:19 AM 36 2002 51 2 55
2009
AVERAGE 71 69 2
PRECIPITATION (IN)
YESTERDAY 0.01 1.00 2003 0.02 -0.01 0.01
MONTH TO DATE 1.85 0.49 1.36 0.23
SINCE JUN 1 2.53 3.02 -0.49 1.90
SINCE JAN 1 6.18 8.53 -2.35 6.82
SNOWFALL (IN)
YESTERDAY 0.0 T 2022 0.0 0.0 0.0
MONTH TO DATE 0.0 0.0 0.0 0.0
SINCE JUN 1 0.0 0.1 -0.1 0.0
SINCE JUL 1 0.0 0.0 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 0 1 -1 0
MONTH TO DATE 5 5 0 4
SINCE JUN 1 97 145 -48 100
SINCE JUL 1 5 19 -14 9
COOLING
YESTERDAY 6 5 1 7
MONTH TO DATE 118 104 14 96
SINCE JUN 1 495 355 140 398
SINCE JAN 1 496 359 137 398
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 29 HIGHEST WIND DIRECTION SW (230)
HIGHEST GUST SPEED 51 HIGHEST GUST DIRECTION W (250)
AVERAGE WIND SPEED 8.0
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
THUNDERSTORM
RAIN
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 3:00 AM
LOWEST 19 2:00 PM
AVERAGE 56
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THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 87 99 1986
MINIMUM TEMPERATURE (F) 51 37 2009
SUNRISE AND SUNSET
AUGUST 18 2026........SUNRISE 6:15 AM MDT SUNSET 8:03 PM MDT
AUGUST 19 2026........SUNRISE 6:16 AM MDT SUNSET 8:02 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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