930  
CDUS45 KRIW 100734  
CLIP60  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE RIVERTON WY  
1234 AM MST SUN DEC 10 2023  
   
...............................  
 
   
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR DECEMBER 9 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 17 1:12 PM 39 2014 24 -7 21  
2020  
MINIMUM -3 8:59 AM -28 2013 4 -7 -4  
AVERAGE 7 14 -7 9  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.58 2003 0.07 -0.07 0.03  
MONTH TO DATE 0.88 0.65 0.23 1.59  
SINCE DEC 1 0.88 0.65 0.23 1.59  
SINCE JAN 1 26.98 21.39 5.59 26.37  
 
DEGREE DAYS  
HEATING  
YESTERDAY 58 51 7 56  
MONTH TO DATE 399 453 -54 459  
SINCE DEC 1 399 453 -54 459  
SINCE JUL 1 3473 3960 -487 3679  
 
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 9 HIGHEST WIND DIRECTION W (280)  
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION W (290)  
AVERAGE WIND SPEED 2.0  
 
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 91 12:00 AM  
LOWEST 67 3:00 PM  
AVERAGE 79  
   
......................................................  
 
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 24 36 2004  
2014  
MINIMUM TEMPERATURE (F) 3 -24 2009  
 
SUNRISE AND SUNSET  
DECEMBER 10 2023......SUNRISE 7:47 AM MST SUNSET 4:42 PM MST  
DECEMBER 11 2023......SUNRISE 7:48 AM MST SUNSET 4:42 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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