604
CDUS45 KRIW 180045
CLILND
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
545 PM MST WED DEC 17 2025
...............................
..THE LANDER WY CLIMATE SUMMARY FOR DECEMBER 17 2025
VALID TODAY AS OF 0500 PM LOCAL TIME.
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1891 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
TODAY
MAXIMUM 54 5:09 AM 62 1980 32 22 40
MINIMUM 34 1:10 AM -29 1924 9 25 20
AVERAGE 44 21 23 30
PRECIPITATION (IN)
TODAY 0.03 0.38 1924 0.02 0.01 0.00
MONTH TO DATE 0.21 0.36 -0.15 0.00
SINCE DEC 1 0.21 0.36 -0.15 0.00
SINCE JAN 1 13.34 12.96 0.38 9.19
SNOWFALL (IN)
TODAY MM 0.3 MM 0.0
MONTH TO DATE 2.6 5.3 -2.7 0.0
SINCE DEC 1 2.6 5.3 -2.7 0.0
SINCE JUL 1 3.7 27.9 -24.2 10.3
SNOW DEPTH MM
DEGREE DAYS
HEATING
TODAY 21 44 -23 35
MONTH TO DATE 474 721 -247 551
SINCE DEC 1 474 721 -247 551
SINCE JUL 1 1844 2549 -705 1980
COOLING
TODAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE DEC 1 0 0 0 0
SINCE JAN 1 569 485 84 644
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 59 HIGHEST WIND DIRECTION SW (230)
HIGHEST GUST SPEED 92 HIGHEST GUST DIRECTION S (180)
AVERAGE WIND SPEED 21.0
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 76
LOWEST 26
AVERAGE 51
......................................................
THE LANDER WY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 32 55 1954
1979
MINIMUM TEMPERATURE (F) 9 -36 1924
SUNRISE AND SUNSET
DECEMBER 17 2025......SUNRISE 7:40 AM MST SUNSET 4:42 PM MST
DECEMBER 18 2025......SUNRISE 7:41 AM MST SUNSET 4:43 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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