185
CDUS45 KRIW 210731
CLILND
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
131 AM MDT SUN SEP 21 2025
...............................
..THE LANDER WY CLIMATE SUMMARY FOR SEPTEMBER 20 2025
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)
YESTERDAY
MAXIMUM 80 3:21 PM 88 1956 73 7 79
2016
MINIMUM 53 5:55 AM 23 1983 43 10 44
AVERAGE 67 58 9
PRECIPITATION (IN)
YESTERDAY 0.00 1.42 1989 0.04 -0.04 0.00
MONTH TO DATE 0.36 0.53 -0.17 0.40
SINCE SEP 1 0.36 0.53 -0.17 0.40
SINCE JAN 1 10.37 9.97 0.40 7.42
SNOWFALL (IN)
YESTERDAY 0.0 2.0 1995 0.1 -0.1 0.0
MONTH TO DATE 0.0 0.5 -0.5 0.0
SINCE SEP 1 0.0 0.5 -0.5 0.0
SINCE JUL 1 0.0 0.5 -0.5 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 0 8 -8 3
MONTH TO DATE 63 93 -30 49
SINCE SEP 1 63 93 -30 49
SINCE JUL 1 68 132 -64 67
COOLING
YESTERDAY 2 0 2 0
MONTH TO DATE 42 31 11 60
SINCE SEP 1 42 31 11 60
SINCE JAN 1 569 483 86 621
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WIND (MPH)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION SW (220)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION SW (220)
AVERAGE WIND SPEED 5.8
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 62 8:00 AM
LOWEST 19 5:00 PM
AVERAGE 41
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THE LANDER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 72 87 1905
MINIMUM TEMPERATURE (F) 43 25 1983
SUNRISE AND SUNSET
SEPTEMBER 21 2025.....SUNRISE 7:02 AM MDT SUNSET 7:13 PM MDT
SEPTEMBER 22 2025.....SUNRISE 7:03 AM MDT SUNSET 7:11 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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