Climatological Report (Daily)
Issued by NWS
Issued by NWS
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069
CDUS45 KRIW 140729
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
129 AM MDT MON SEP 14 2026
...................................
...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR SEPTEMBER 13 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 66 3:20 PM 73 2015 62 4 58
MINIMUM 37 2:07 AM 24 2003 31 6 35
2012
2014
AVERAGE 52 46 6 47
PRECIPITATION (IN)
YESTERDAY 0.00 0.68 2023 0.05 -0.05 0.02
MONTH TO DATE 0.33 0.65 -0.32 1.15
SINCE SEP 1 0.33 0.65 -0.32 1.15
SINCE JAN 1 14.25 15.91 -1.66 12.86
DEGREE DAYS
HEATING
YESTERDAY 13 19 -6 18
MONTH TO DATE 199 218 -19 172
SINCE SEP 1 199 218 -19 172
SINCE JUL 1 567 860 -293 688
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE SEP 1 0 0 0 0
SINCE JAN 1 2 0 2 1
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION W (270)
HIGHEST GUST SPEED 33 HIGHEST GUST DIRECTION W (270)
AVERAGE WIND SPEED 4.8
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 6:00 AM
LOWEST 28 1:00 PM
AVERAGE 61
..........................................................
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 62 74 2020
MINIMUM TEMPERATURE (F) 31 22 2003
SUNRISE AND SUNSET
SEPTEMBER 14 2026.....SUNRISE 7:00 AM MDT SUNSET 7:34 PM MDT
SEPTEMBER 15 2026.....SUNRISE 7:01 AM MDT SUNSET 7:32 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$