138  
CDUS45 KRIW 130733  
CLIGEY  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE RIVERTON WY  
133 AM MDT WED AUG 13 2025  
   
...............................
 
 
   
..THE GREYBULL WY CLIMATE SUMMARY FOR AUGUST 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 94 4:47 PM 105 2018 90 4 90  
MINIMUM 59 5:36 AM 45 2004 57 2 53  
AVERAGE 77 74 3 72  
 
PRECIPITATION (IN)  
YESTERDAY 0.03 0.04 2005 0.00 0.03 0.00  
MONTH TO DATE 0.09 0.06 0.03 0.07  
SINCE JUN 1 1.41 1.30 0.11 1.56  
SINCE JAN 1 4.12 3.65 0.47 4.79  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE JUN 1 46 66 -20 33  
SINCE JUL 1 0 4 -4 4  
 
COOLING  
YESTERDAY 12 9 3 7  
MONTH TO DATE 100 119 -19 107  
SINCE JUN 1 540 550 -10 594  
SINCE JAN 1 561 574 -13 594    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 30 HIGHEST WIND DIRECTION W (250)  
HIGHEST GUST SPEED 45 HIGHEST GUST DIRECTION W (260)  
AVERAGE WIND SPEED 6.7  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.2  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 60 3:00 AM  
LOWEST 16 5:00 PM  
AVERAGE 38  
   
......................................................
 
 
THE GREYBULL WY CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 90 103 2003  
MINIMUM TEMPERATURE (F) 57 47 2004  
 
SUNRISE AND SUNSET  
AUGUST 13 2025........SUNRISE 6:13 AM MDT SUNSET 8:20 PM MDT  
AUGUST 14 2025........SUNRISE 6:14 AM MDT SUNSET 8:19 PM MDT  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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