Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS45 KRIW 120728
CLIGEY
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
128 AM MDT FRI SEP 12 2025
...................................
...THE GREYBULL WY CLIMATE SUMMARY FOR SEPTEMBER 11 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 85 3:50 PM 91 2017 79 6 87
MINIMUM 57 6:03 AM 34 2014 47 10 56
AVERAGE 71 63 8 72
PRECIPITATION (IN)
YESTERDAY 0.00 T 2000 0.02 -0.02 0.00
2005
2021
MONTH TO DATE 0.01 0.24 -0.23 0.03
SINCE SEP 1 0.01 0.24 -0.23 0.03
SINCE JAN 1 4.21 4.06 0.15 5.34
DEGREE DAYS
HEATING
YESTERDAY 0 4 -4 0
MONTH TO DATE 9 31 -22 0
SINCE SEP 1 9 31 -22 0
SINCE JUL 1 9 50 -41 13
COOLING
YESTERDAY 6 2 4 7
MONTH TO DATE 39 32 7 64
SINCE SEP 1 39 32 7 64
SINCE JAN 1 780 728 52 805
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 28 HIGHEST WIND DIRECTION NW (330)
HIGHEST GUST SPEED 36 HIGHEST GUST DIRECTION NW (320)
AVERAGE WIND SPEED 10.2
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 65 3:00 AM
LOWEST 21 4:00 PM
AVERAGE 43
..........................................................
THE GREYBULL WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 79 93 2017
MINIMUM TEMPERATURE (F) 46 30 2014
SUNRISE AND SUNSET
SEPTEMBER 12 2025.....SUNRISE 6:48 AM MDT SUNSET 7:28 PM MDT
SEPTEMBER 13 2025.....SUNRISE 6:49 AM MDT SUNSET 7:26 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$