935  
CDUS45 KRIW 210729  
CLIRKS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE RIVERTON WY  
129 AM MDT THU AUG 21 2025  
   
...............................
 
 
   
..THE ROCK SPRINGS WY CLIMATE SUMMARY FOR AUGUST 20 2025
 
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1948 TO 2025  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 95R 2:13 PM 90 2003 81 14 87  
MINIMUM 54 5:07 AM 36 1964 52 2 53  
2016  
AVERAGE 75 66 9  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.30 1979 0.02 -0.02 0.00  
MONTH TO DATE 0.03 0.36 -0.33 0.70  
SINCE JUN 1 0.43 1.53 -1.10 1.21  
SINCE JAN 1 2.74 5.04 -2.30 4.08  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 10 11 -1 7  
SINCE JUN 1 79 191 -112 69  
SINCE JUL 1 10 32 -22 14  
 
COOLING  
YESTERDAY 10 3 7 5  
MONTH TO DATE 106 89 17 108  
SINCE JUN 1 388 287 101 380  
SINCE JAN 1 392 289 103 380    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION NW (300)  
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 6.5  
 
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 22 11:00 PM  
LOWEST 6 2:00 PM  
AVERAGE 14  
   
......................................................
 
 
THE ROCK SPRINGS WY CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 80 92 2003  
MINIMUM TEMPERATURE (F) 52 34 1966  
 
SUNRISE AND SUNSET  
AUGUST 21 2025........SUNRISE 6:31 AM MDT SUNSET 8:06 PM MDT  
AUGUST 22 2025........SUNRISE 6:33 AM MDT SUNSET 8:05 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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