133
CDUS45 KRIW 150728
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
128 AM MDT MON SEP 15 2025
...............................
..THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 14 2025
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1939 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 79 1:31 PM 92 1948 77 2 83
MINIMUM 48 9:31 PM 28 1961 43 5 30
AVERAGE 64 60 4
PRECIPITATION (IN)
YESTERDAY 0.00 0.52 1982 0.02 -0.02 0.00
MONTH TO DATE 0.01 0.35 -0.34 0.17
SINCE SEP 1 0.01 0.35 -0.34 0.17
SINCE JAN 1 7.32 9.18 -1.86 7.15
SNOWFALL (IN)
YESTERDAY 0.0 3.6 1982 0.0 0.0 0.0
MONTH TO DATE 0.0 0.3 -0.3 0.0
SINCE SEP 1 0.0 0.3 -0.3 0.0
SINCE JUL 1 0.0 0.3 -0.3 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 1 6 -5 8
MONTH TO DATE 40 61 -21 22
SINCE SEP 1 40 61 -21 22
SINCE JUL 1 50 106 -56 60
COOLING
YESTERDAY 0 1 -1 0
MONTH TO DATE 15 24 -9 51
SINCE SEP 1 15 24 -9 51
SINCE JAN 1 465 436 29 526
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WIND (MPH)
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION W (270)
HIGHEST GUST SPEED 33 HIGHEST GUST DIRECTION W (280)
AVERAGE WIND SPEED 10.6
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 74 6:00 AM
LOWEST 18 5:00 PM
AVERAGE 46
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THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 76 92 2000
MINIMUM TEMPERATURE (F) 43 28 1947
1965
SUNRISE AND SUNSET
SEPTEMBER 15 2025.....SUNRISE 6:46 AM MDT SUNSET 7:15 PM MDT
SEPTEMBER 16 2025.....SUNRISE 6:47 AM MDT SUNSET 7:13 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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