013  
CDUS45 KRIW 290737  
CLIP60  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE RIVERTON WY  
137 AM MDT TUE APR 29 2025  
   
...............................  
 
   
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR APRIL 28 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 62 2007 44 MM MM  
2018  
MINIMUM MM MM 9 2019 20 MM MM  
AVERAGE MM 32 MM MM  
 
PRECIPITATION (IN)  
YESTERDAY MM 0.58 2009 0.07 MM MM  
MONTH TO DATE 1.82 2.15 -0.33 0.95  
SINCE MAR 1 2.31 4.05 -1.74 5.26  
SINCE JAN 1 6.01 7.55 -1.54 9.73  
 
DEGREE DAYS  
HEATING  
YESTERDAY MM 33 MM MM  
MONTH TO DATE 961 1025 -64 747  
SINCE MAR 1 1105 2383 -1278 2115  
SINCE JUL 1 8025 10587 -2562 9589  
 
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) 45 65 2007  
MINIMUM TEMPERATURE (F) 21 7 2019  
 
SUNRISE AND SUNSET  
APRIL 29 2025.........SUNRISE 6:14 AM MDT SUNSET 8:24 PM MDT  
APRIL 30 2025.........SUNRISE 6:13 AM MDT SUNSET 8:25 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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