843  
CDUS45 KRIW 300727  
CLIP60  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE RIVERTON WY  
127 AM MDT FRI MAY 30 2025  
   
...............................
 
 
   
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR MAY 29 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 69 2:35 PM 77 2003 55 14 53  
MINIMUM 31 5:00 AM 26 2016 30 1 33  
2021  
AVERAGE 50 42 8 43  
 
PRECIPITATION (IN)  
YESTERDAY 0.04 0.93 2022 0.10 -0.06 0.32  
MONTH TO DATE 2.45 2.17 0.28 2.38  
SINCE MAR 1 5.53 6.35 -0.82 7.71  
SINCE JAN 1 9.23 9.85 -0.62 12.18  
 
DEGREE DAYS  
HEATING  
YESTERDAY 15 23 -8 22  
MONTH TO DATE 690 779 -89 726  
SINCE MAR 1 1885 3225 -1340 2878  
SINCE JUL 1 8805 11429 -2624 10352  
 
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 14 HIGHEST WIND DIRECTION W (280)  
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION W (270)  
AVERAGE WIND SPEED 2.3  
 
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 5:00 AM  
LOWEST 46 2:00 PM  
AVERAGE 71  
   
......................................................
 
 
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 55 75 2020  
MINIMUM TEMPERATURE (F) 30 24 2007  
 
SUNRISE AND SUNSET  
MAY 30 2025...........SUNRISE 5:41 AM MDT SUNSET 8:58 PM MDT  
MAY 31 2025...........SUNRISE 5:40 AM MDT SUNSET 8:59 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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