195  
CDUS45 KRIW 180728  
CLIP60  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE RIVERTON WY  
1228 AM MST MON DEC 18 2023  
   
...............................  
 
   
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR DECEMBER 17 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 33 2:53 PM 38 2018 23 10 11  
MINIMUM 3 8:21 AM -28 2016 2 1 0  
AVERAGE 18 12 6 6  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.53 2003 0.07 -0.07 0.00  
MONTH TO DATE 1.03 1.24 -0.21 1.74  
SINCE DEC 1 1.03 1.24 -0.21 1.74  
SINCE JAN 1 27.13 21.98 5.15 26.52  
 
DEGREE DAYS  
HEATING  
YESTERDAY 47 53 -6 59  
MONTH TO DATE 787 870 -83 886  
SINCE DEC 1 787 870 -83 886  
SINCE JUL 1 3861 4377 -516 4106  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 0 0 0 0    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 6 HIGHEST WIND DIRECTION W (280)  
HIGHEST GUST SPEED 7 HIGHEST GUST DIRECTION W (270)  
AVERAGE WIND SPEED 1.5  
 
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 95 10:00 AM  
LOWEST 53 3:00 PM  
AVERAGE 74  
   
......................................................  
 
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 23 34 2013  
MINIMUM TEMPERATURE (F) 2 -23 2016  
 
SUNRISE AND SUNSET  
DECEMBER 18 2023......SUNRISE 7:53 AM MST SUNSET 4:43 PM MST  
DECEMBER 19 2023......SUNRISE 7:54 AM MST SUNSET 4:44 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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