150  
CDUS45 KRIW 130745  
CLIGEY  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE RIVERTON WY  
1245 AM MST WED DEC 13 2023  
   
...............................  
 
   
..THE GREYBULL WY CLIMATE SUMMARY FOR DECEMBER 12 2023  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1998 TO 2023  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................  
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 39 3:23 PM 51 2014 31 8 30  
MINIMUM 16 11:49 PM -15 2000 8 8 17  
AVERAGE 28 20 8 24  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 T 2018 0.00 0.00 0.03  
2020  
MONTH TO DATE T 0.04 -0.04 0.03  
SINCE DEC 1 T 0.04 -0.04 0.03  
SINCE JAN 1 8.68 5.48 3.20 5.90  
 
DEGREE DAYS  
HEATING  
YESTERDAY 37 45 -8 41  
MONTH TO DATE 434 523 -89 548  
SINCE DEC 1 434 523 -89 548  
SINCE JUL 1 2039 2300 -261 2480  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 702 744 -42 943    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 8 HIGHEST WIND DIRECTION SW (240)  
HIGHEST GUST SPEED 9 HIGHEST GUST DIRECTION SW (230)  
AVERAGE WIND SPEED 1.7  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.3  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
FOG W/VISIBILITY <= 1/4 MILE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 11:00 AM  
LOWEST 64 4:00 PM  
AVERAGE 82  
   
......................................................  
 
THE GREYBULL WY CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 31 51 2021  
MINIMUM TEMPERATURE (F) 8 -10 2000  
 
SUNRISE AND SUNSET  
DECEMBER 13 2023......SUNRISE 7:40 AM MST SUNSET 4:33 PM MST  
DECEMBER 14 2023......SUNRISE 7:41 AM MST SUNSET 4:33 PM MST  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 
 
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