646
CDUS45 KRIW 190045
CLILND
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
545 PM MST THU DEC 18 2025
...............................
..THE LANDER WY CLIMATE SUMMARY FOR DECEMBER 18 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 36 2:42 PM 55 1954 32 4 51
1979
MINIMUM 21 8:19 AM -36 1924 9 12 17
AVERAGE 29 21 8 34
PRECIPITATION (IN)
TODAY 0.00 0.25 1973 0.02 -0.02 0.00
MONTH TO DATE 0.21 0.38 -0.17 0.00
SINCE DEC 1 0.21 0.38 -0.17 0.00
SINCE JAN 1 13.34 12.98 0.36 9.19
SNOWFALL (IN)
TODAY MM 0.3 MM 0.0
MONTH TO DATE 2.6 5.6 -3.0 0.0
SINCE DEC 1 2.6 5.6 -3.0 0.0
SINCE JUL 1 3.7 28.2 -24.5 10.3
SNOW DEPTH MM
DEGREE DAYS
HEATING
TODAY 36 44 -8 31
MONTH TO DATE 512 765 -253 582
SINCE DEC 1 512 765 -253 582
SINCE JUL 1 1882 2593 -711 2011
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 35 HIGHEST WIND DIRECTION NW (300)
HIGHEST GUST SPEED 45 HIGHEST GUST DIRECTION NW (300)
AVERAGE WIND SPEED 9.5
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 57
LOWEST 26
AVERAGE 42
......................................................
THE LANDER WY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 32 62 1917
MINIMUM TEMPERATURE (F) 9 -40 1924
SUNRISE AND SUNSET
DECEMBER 18 2025......SUNRISE 7:41 AM MST SUNSET 4:43 PM MST
DECEMBER 19 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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