231  
CDUS45 KRIW 290732  
CLIRIW  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE RIVERTON WY  
132 AM MDT FRI SEP 29 2023  
   
...............................
 
 
   
..THE RIVERTON WY CLIMATE SUMMARY FOR SEPTEMBER 28 2023
 
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1995 TO 2023  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 74 3:58 PM 86 2001 68 6 83  
MINIMUM 45 6:33 AM 26 1999 39 6 49  
AVERAGE 60 54 6 66  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.56 0.03 -0.03 0.00  
MONTH TO DATE 0.67 0.70 -0.03 0.95  
SINCE SEP 1 0.67 0.70 -0.03 0.95  
SINCE JAN 1 10.83 7.06 3.77 7.35  
 
SNOWFALL (IN)  
YESTERDAY 0.0 0.0 2020 0.0  
MONTH TO DATE 0.0 0.0  
SINCE SEP 1 0.0 0.0  
SINCE JUL 1 0.0 0.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 5 12 -7 0  
MONTH TO DATE 94 180 -86 103  
SINCE SEP 1 94 180 -86 103  
SINCE JUL 1 127 216 -89 104  
 
COOLING  
YESTERDAY 0 0 0 1  
MONTH TO DATE 30 28 2 96  
SINCE SEP 1 30 28 2 96  
SINCE JAN 1 401 496 -95 703    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION NE (60)  
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION NE (60)  
AVERAGE WIND SPEED 7.3  
 
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 63 7:00 AM  
LOWEST 24 5:00 PM  
AVERAGE 44  
   
......................................................
 
 
THE RIVERTON WY CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 67 83 2009  
MINIMUM TEMPERATURE (F) 39 29 1999  
 
SUNRISE AND SUNSET  
SEPTEMBER 29 2023.....SUNRISE 7:09 AM MDT SUNSET 6:59 PM MDT  
SEPTEMBER 30 2023.....SUNRISE 7:10 AM MDT SUNSET 6:57 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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