897  
CDUS45 KRIW 120738  
CLIP60  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE RIVERTON WY  
1238 AM MST TUE DEC 12 2023  
   
...............................  
 
   
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR DECEMBER 11 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 29 1:40 PM 41 2014 23 6 29  
MINIMUM 15 11:59 PM -17 2007 3 12 8  
AVERAGE 22 13 9 19  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.08 2015 0.07 -0.07 0.04  
MONTH TO DATE 1.03 0.79 0.24 1.63  
SINCE DEC 1 1.03 0.79 0.24 1.63  
SINCE JAN 1 27.13 21.53 5.60 26.41  
 
DEGREE DAYS  
HEATING  
YESTERDAY 43 52 -9 46  
MONTH TO DATE 491 557 -66 555  
SINCE DEC 1 491 557 -66 555  
SINCE JUL 1 3565 4064 -499 3775  
 
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 5 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 9 HIGHEST GUST DIRECTION E (90)  
AVERAGE WIND SPEED 0.4  
 
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 92 9:00 AM  
LOWEST 77 1:00 PM  
AVERAGE 85  
   
......................................................  
 
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 23 46 2014  
MINIMUM TEMPERATURE (F) 3 -9 2020  
 
SUNRISE AND SUNSET  
DECEMBER 12 2023......SUNRISE 7:49 AM MST SUNSET 4:42 PM MST  
DECEMBER 13 2023......SUNRISE 7:50 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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