578  
CDUS45 KRIW 140730  
CLIP60  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE RIVERTON WY  
130 AM MDT WED MAY 14 2025  
   
...............................
 
 
   
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR MAY 13 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 MM MM 70 2013 50 MM MM  
MINIMUM MM MM 12 2014 26 MM MM  
AVERAGE MM 38 MM MM  
 
PRECIPITATION (IN)  
YESTERDAY MM 0.17 2020 0.07 MM MM  
MONTH TO DATE 0.15 0.85 -0.70 0.82  
SINCE MAR 1 3.23 5.03 -1.80 6.15  
SINCE JAN 1 6.93 8.53 -1.60 10.62  
 
DEGREE DAYS  
HEATING  
YESTERDAY MM 27 MM MM  
MONTH TO DATE 280 382 -102 336  
SINCE MAR 1 1475 2828 -1353 2488  
SINCE JUL 1 8395 11032 -2637 9962  
 
COOLING  
YESTERDAY MM 0 MM MM  
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 MM HIGHEST WIND DIRECTION MM  
HIGHEST GUST SPEED MM HIGHEST GUST DIRECTION MM  
AVERAGE WIND SPEED MM  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER MM  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST MM  
LOWEST MM  
AVERAGE MM  
   
......................................................
 
 
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 50 64 2006  
2013  
MINIMUM TEMPERATURE (F) 26 16 1999  
 
SUNRISE AND SUNSET  
MAY 14 2025...........SUNRISE 5:55 AM MDT SUNSET 8:42 PM MDT  
MAY 15 2025...........SUNRISE 5:54 AM MDT SUNSET 8:43 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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