Climatological Report (Daily)
Issued by NWS
Issued by NWS
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984
CDUS45 KRIW 210727
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
127 AM MDT FRI AUG 21 2026
...................................
...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR AUGUST 20 2026...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 80 2:17 PM 81 2013 70 10 73
MINIMUM 38 5:43 AM 27 2016 36 2 40
AVERAGE 59 53 6 57
PRECIPITATION (IN)
YESTERDAY 0.00 0.83 2023 0.04 -0.04 0.00
MONTH TO DATE 2.03 0.85 1.18 0.09
SINCE JUN 1 4.99 4.74 0.25 1.48
SINCE JAN 1 13.23 14.77 -1.54 10.71
DEGREE DAYS
HEATING
YESTERDAY 6 12 -6 8
MONTH TO DATE 160 198 -38 176
SINCE JUN 1 790 1032 -242 849
SINCE JUL 1 276 494 -218 407
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE JUN 1 2 0 2 1
SINCE JAN 1 2 0 2 1
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION W (270)
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION W (280)
AVERAGE WIND SPEED 3.0
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 93 4:00 AM
LOWEST 19 4:00 PM
AVERAGE 56
..........................................................
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 2026........SUNRISE 6:32 AM MDT SUNSET 8:17 PM MDT
AUGUST 22 2026........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.
$$