451  
CDUS45 KRIW 190802  
CLIGEY  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE RIVERTON WY  
102 AM MST TUE DEC 19 2023  
   
...............................
 
 
   
..THE GREYBULL WY CLIMATE SUMMARY FOR DECEMBER 18 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 36 3:15 PM 48 1999 30 6 18  
MINIMUM 11 5:55 AM -25 2016 7 4 -2  
AVERAGE 24 18 6 8  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 T 1999 0.01 -0.01 0.00  
2010  
MONTH TO DATE T 0.07 -0.07 0.03  
SINCE DEC 1 T 0.07 -0.07 0.03  
SINCE JAN 1 8.68 5.51 3.17 5.90  
 
DEGREE DAYS  
HEATING  
YESTERDAY 41 47 -6 57  
MONTH TO DATE 670 800 -130 843  
SINCE DEC 1 670 800 -130 843  
SINCE JUL 1 2275 2577 -302 2775  
 
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 SE (130)  
HIGHEST GUST SPEED 12 HIGHEST GUST DIRECTION SE (150)  
AVERAGE WIND SPEED 1.4  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.1  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 88 4:00 AM  
LOWEST 54 3:00 PM  
AVERAGE 71  
   
......................................................
 
 
THE GREYBULL WY CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 30 46 2004  
MINIMUM TEMPERATURE (F) 7 -16 2016  
 
SUNRISE AND SUNSET  
DECEMBER 19 2023......SUNRISE 7:44 AM MST SUNSET 4:34 PM MST  
DECEMBER 20 2023......SUNRISE 7:45 AM MST SUNSET 4:35 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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