Climatological Report (Daily)
Issued by NWS
Issued by NWS
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932
CDUS45 KRIW 210729
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
129 AM MDT THU AUG 21 2025
...................................
...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR AUGUST 20 2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 73 6:06 PM 81 2013 70 3 77
MINIMUM 40 6:11 AM 27 2016 36 4 41
AVERAGE 57 53 4 59
PRECIPITATION (IN)
YESTERDAY 0.00 0.83 2023 0.04 -0.04 0.05
MONTH TO DATE 0.09 0.85 -0.76 1.01
SINCE JUN 1 1.48 4.74 -3.26 2.75
SINCE JAN 1 10.71 14.77 -4.06 14.95
DEGREE DAYS
HEATING
YESTERDAY 8 12 -4 6
MONTH TO DATE 176 198 -22 173
SINCE JUN 1 849 1032 -183 864
SINCE JUL 1 407 494 -87 435
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE JUN 1 1 0 1 0
SINCE JAN 1 1 0 1 0
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION W (270)
HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION W (280)
AVERAGE WIND SPEED 2.1
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 70 5:00 AM
LOWEST 25 12:00 PM
AVERAGE 48
..........................................................
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 70 82 2009
MINIMUM TEMPERATURE (F) 36 32 2000
2021
SUNRISE AND SUNSET
AUGUST 21 2025........SUNRISE 6:32 AM MDT SUNSET 8:17 PM MDT
AUGUST 22 2025........SUNRISE 6:33 AM MDT SUNSET 8:15 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$