Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS45 KRIW 130727
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
127 AM MDT SAT SEP 13 2025
...................................
...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR SEPTEMBER 12 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 64 1:55 PM 75 2017 62 2 44
MINIMUM 32 6:46 AM 18 2014 31 1 32
AVERAGE 48 47 1 38
PRECIPITATION (IN)
YESTERDAY 0.00 0.76 2016 0.05 -0.05 0.21
MONTH TO DATE 0.84 0.60 0.24 0.54
SINCE SEP 1 0.84 0.60 0.24 0.54
SINCE JAN 1 12.55 15.86 -3.31 15.73
DEGREE DAYS
HEATING
YESTERDAY 17 18 -1 27
MONTH TO DATE 136 199 -63 147
SINCE SEP 1 136 199 -63 147
SINCE JUL 1 652 841 -189 724
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE SEP 1 0 0 0 0
SINCE JAN 1 1 0 1 0
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 8 HIGHEST WIND DIRECTION W (260)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION W (250)
AVERAGE WIND SPEED 2.3
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 79 10:00 PM
LOWEST 29 2:00 PM
AVERAGE 54
..........................................................
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 62 73 2015
MINIMUM TEMPERATURE (F) 31 24 2003
2012
2014
SUNRISE AND SUNSET
SEPTEMBER 13 2025.....SUNRISE 6:59 AM MDT SUNSET 7:35 PM MDT
SEPTEMBER 14 2025.....SUNRISE 7:00 AM MDT SUNSET 7:33 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$