Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS45 KRIW 260726
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
126 AM MDT SAT SEP 26 2026
...................................
...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR SEPTEMBER 25 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 67 3:13 PM 74 2015 56 11 68
MINIMUM 31 6:40 AM 20 2000 28 3 29
2018
AVERAGE 49 42 7 49
PRECIPITATION (IN)
YESTERDAY 0.00 0.39 2013 0.05 -0.05 0.00
MONTH TO DATE 1.57 1.29 0.28 1.36
SINCE SEP 1 1.57 1.29 0.28 1.36
SINCE JAN 1 15.49 16.55 -1.06 13.07
DEGREE DAYS
HEATING
YESTERDAY 16 23 -7 16
MONTH TO DATE 412 468 -56 400
SINCE SEP 1 412 468 -56 400
SINCE JUL 1 780 1110 -330 916
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 12 HIGHEST WIND DIRECTION W (250)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION SW (210)
AVERAGE WIND SPEED 2.2
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 96 2:00 AM
LOWEST 26 3:00 PM
AVERAGE 61
..........................................................
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 56 73 2010
2015
MINIMUM TEMPERATURE (F) 28 20 2018
SUNRISE AND SUNSET
SEPTEMBER 26 2026.....SUNRISE 7:14 AM MDT SUNSET 7:11 PM MDT
SEPTEMBER 27 2026.....SUNRISE 7:15 AM MDT SUNSET 7:09 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$