Climatological Report (Daily)
Issued by NWS
Issued by NWS
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787
CDUS45 KRIW 170730
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
130 AM MDT SUN AUG 17 2025
...................................
...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR AUGUST 16 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 72 12:01 PM 82 2013 71 1 69
MINIMUM 42 11:59 PM 28 2009 37 5 35
AVERAGE 57 54 3 52
PRECIPITATION (IN)
YESTERDAY 0.02 0.12 2004 0.04 -0.02 0.00
MONTH TO DATE 0.07 0.68 -0.61 0.96
SINCE JUN 1 1.46 4.57 -3.11 2.70
SINCE JAN 1 10.69 14.60 -3.91 14.90
DEGREE DAYS
HEATING
YESTERDAY 8 11 -3 13
MONTH TO DATE 146 152 -6 150
SINCE JUN 1 819 986 -167 841
SINCE JUL 1 377 448 -71 412
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 18 HIGHEST WIND DIRECTION NW (310)
HIGHEST GUST SPEED 39 HIGHEST GUST DIRECTION NW (310)
AVERAGE WIND SPEED 2.7
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 11:00 PM
LOWEST 33 6:00 PM
AVERAGE 63
..........................................................
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 71 85 2020
MINIMUM TEMPERATURE (F) 37 28 2009
SUNRISE AND SUNSET
AUGUST 17 2025........SUNRISE 6:27 AM MDT SUNSET 8:23 PM MDT
AUGUST 18 2025........SUNRISE 6:28 AM MDT SUNSET 8:22 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$