583
CDUS45 KRIW 180740
CLIRKS
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1240 AM MST THU DEC 18 2025
...............................
..THE ROCK SPRINGS WY CLIMATE SUMMARY FOR DECEMBER 17 2025
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1948 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 52 1:42 PM 57 1980 29 23 36
MINIMUM 25 11:59 PM -16 1964 13 12 24
AVERAGE 39 21 18
PRECIPITATION (IN)
YESTERDAY 0.04 0.20 1970 0.01 0.03 T
MONTH TO DATE 0.05 0.17 -0.12 T
SINCE DEC 1 0.05 0.17 -0.12 T
SINCE JAN 1 4.46 7.41 -2.95 5.69
DEGREE DAYS
HEATING
YESTERDAY 26 44 -18 35
MONTH TO DATE 507 727 -220 667
SINCE DEC 1 507 727 -220 667
SINCE JUL 1 1999 2681 -682 2305
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE DEC 1 0 0 0 0
SINCE JAN 1 442 320 122 445
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 61 HIGHEST WIND DIRECTION W (260)
HIGHEST GUST SPEED 79 HIGHEST GUST DIRECTION W (260)
AVERAGE WIND SPEED 23.8
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 89 2:00 PM
LOWEST 43 10:00 AM
AVERAGE 66
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THE ROCK SPRINGS WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 29 51 1980
MINIMUM TEMPERATURE (F) 13 -12 1964
SUNRISE AND SUNSET
DECEMBER 18 2025......SUNRISE 7:38 AM MST SUNSET 4:48 PM MST
DECEMBER 19 2025......SUNRISE 7:39 AM MST SUNSET 4:48 PM MST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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