914  
CDUS45 KRIW 220727  
CLIP60  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE RIVERTON WY  
127 AM MDT THU MAY 22 2025  
   
...............................
 
 
   
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR MAY 21 2025
 
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1998 TO 2025  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 46 4:48 PM 68 2012 52 -6 45  
MINIMUM 27 11:59 PM 17 2001 28 -1 28  
AVERAGE 37 40 -3 37  
 
PRECIPITATION (IN)  
YESTERDAY 0.06 0.72 2008 0.08 -0.02 0.01  
MONTH TO DATE 2.32 1.47 0.85 1.09  
SINCE MAR 1 5.40 5.65 -0.25 6.42  
SINCE JAN 1 9.10 9.15 -0.05 10.89  
 
DEGREE DAYS  
HEATING  
YESTERDAY 28 25 3 28  
MONTH TO DATE 532 589 -57 516  
SINCE MAR 1 1727 3035 -1308 2668  
SINCE JUL 1 8647 11239 -2592 10142  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE MAR 1 0 0 0 0  
SINCE JAN 1 0 0 0 0    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 9 HIGHEST WIND DIRECTION W (270)  
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION SW (240)  
AVERAGE WIND SPEED 2.7  
 
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 96 2:00 AM  
LOWEST 45 5:00 PM  
AVERAGE 71  
   
......................................................
 
 
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 53 64 2001  
2023  
MINIMUM TEMPERATURE (F) 28 22 2022  
 
SUNRISE AND SUNSET  
MAY 22 2025...........SUNRISE 5:47 AM MDT SUNSET 8:51 PM MDT  
MAY 23 2025...........SUNRISE 5:46 AM MDT SUNSET 8:52 PM MDT  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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