578  
CDUS45 KRIW 180730  
CLIBPI  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE RIVERTON WY  
130 AM MDT THU SEP 18 2025  
   
...............................
 
 
   
..THE BIG PINEY WY CLIMATE SUMMARY FOR SEPTEMBER 17 2025
 
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1976 TO 2025  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 66 4:35 PM 83 1990 69 -3 66  
MINIMUM 42 11:59 PM 22 1984 31 11 34  
AVERAGE 54 50 4  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.22 2022 0.02 -0.02 T  
MONTH TO DATE 0.33 0.34 -0.01 0.29  
SINCE SEP 1 0.33 0.34 -0.01 0.29  
SINCE JAN 1 6.19 6.25 -0.06 3.32  
 
DEGREE DAYS  
HEATING  
YESTERDAY 11 15 -4 15  
MONTH TO DATE 140 202 -62 164  
SINCE SEP 1 140 202 -62 164  
SINCE JUL 1 314 478 -164 376  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE SEP 1 0 0 0 0  
SINCE JAN 1 41 30 11 64    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION S (170)  
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION SW (210)  
AVERAGE WIND SPEED 3.8  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 76 2:00 AM  
LOWEST 26 5:00 PM  
AVERAGE 51  
   
......................................................
 
 
THE BIG PINEY WY CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 69 83 2014  
MINIMUM TEMPERATURE (F) 31 16 2003  
 
SUNRISE AND SUNSET  
SEPTEMBER 18 2025.....SUNRISE 7:04 AM MDT SUNSET 7:24 PM MDT  
SEPTEMBER 19 2025.....SUNRISE 7:05 AM MDT SUNSET 7:22 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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