689  
CDUS45 KRIW 090729  
CLICPR  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE RIVERTON WY  
129 AM MDT FRI MAY 09 2025  
   
...............................
 
 
   
..THE CASPER WY CLIMATE SUMMARY FOR MAY 8 2025
 
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1939 TO 2025  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 73 4:15 PM 84 1987 63 10 51  
MINIMUM 41 5:12 AM 18 2010 34 7 36  
AVERAGE 57 49 8  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.66 1995 0.08 -0.08 0.18  
MONTH TO DATE 0.18 0.54 -0.36 0.94  
SINCE MAR 1 3.10 2.79 0.31 2.73  
SINCE JAN 1 3.82 3.84 -0.02 3.76  
 
SNOWFALL (IN)  
YESTERDAY 0.0 8.9 1979 0.1 -0.1 0.0  
MONTH TO DATE 0.0 1.2 -1.2 3.9  
SINCE MAR 1 15.7 22.0 -6.3 13.2  
SINCE JUL 1 26.2 70.3 -44.1 42.5  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 8 16 -8 21  
MONTH TO DATE 90 142 -52 179  
SINCE MAR 1 1639 1731 -92 1705  
SINCE JUL 1 6654 7093 -439 6660  
 
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 21 HIGHEST WIND DIRECTION SW (220)  
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION SW (220)  
AVERAGE WIND SPEED 10.3  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.1  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 71 11:00 PM  
LOWEST 21 5:00 PM  
AVERAGE 46  
   
......................................................
 
 
THE CASPER WY CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 64 83 1962  
MINIMUM TEMPERATURE (F) 35 18 2002  
 
SUNRISE AND SUNSET  
MAY 9 2025...........SUNRISE 5:49 AM MDT SUNSET 8:16 PM MDT  
MAY 10 2025...........SUNRISE 5:48 AM MDT SUNSET 8:17 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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