458  
CDUS45 KRIW 260735  
CLICPR  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE RIVERTON WY  
135 AM MDT TUE SEP 26 2023  
   
...............................
 
 
   
..THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 25 2023
 
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1939 TO 2023  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 81 3:00 PM 90 2014 71 10 74  
MINIMUM 39 11:59 PM 20 1984 39 0 32  
AVERAGE 60 55 5  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.21 1967 0.04 -0.04 0.00  
MONTH TO DATE 0.59 0.74 -0.15 0.75  
SINCE SEP 1 0.59 0.74 -0.15 0.75  
SINCE JAN 1 13.07 9.57 3.50 11.14  
 
SNOWFALL (IN)  
YESTERDAY 0.0 1.5 1996 0.1 -0.1 0.0  
MONTH TO DATE 0.0 1.0 -1.0 0.0  
SINCE SEP 1 0.0 1.0 -1.0 0.0  
SINCE JUL 1 0.0 1.0 -1.0 T  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 5 10 -5 12  
MONTH TO DATE 102 153 -51 122  
SINCE SEP 1 102 153 -51 122  
SINCE JUL 1 155 198 -43 124  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 19 29 -10 68  
SINCE SEP 1 19 29 -10 68  
SINCE JAN 1 341 441 -100 544    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION SW (220)  
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION SW (230)  
AVERAGE WIND SPEED 7.6  
 
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 62 12:00 AM  
LOWEST 11 5:00 PM  
AVERAGE 37  
   
......................................................
 
 
THE CASPER WY CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 70 91 2015  
MINIMUM TEMPERATURE (F) 38 21 1972  
 
SUNRISE AND SUNSET  
SEPTEMBER 26 2023.....SUNRISE 6:57 AM MDT SUNSET 6:56 PM MDT  
SEPTEMBER 27 2023.....SUNRISE 6:59 AM MDT SUNSET 6:54 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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