580  
CDUS45 KRIW 290732  
CLILND  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE RIVERTON WY  
132 AM MDT FRI SEP 29 2023  
   
...............................
 
 
   
..THE LANDER WY CLIMATE SUMMARY FOR SEPTEMBER 28 2023
 
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1891 TO 2023  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 72 4:20 PM 89 2010 68 4 MM  
MINIMUM 49 7:23 AM 22 1985 40 9 49  
AVERAGE 61 54 7  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.37 2014 0.05 -0.05 0.00  
MONTH TO DATE 0.56 0.89 -0.33 0.95  
SINCE SEP 1 0.56 0.89 -0.33 0.95  
SINCE JAN 1 13.78 10.33 3.45 10.67  
 
SNOWFALL (IN)  
YESTERDAY 0.0 3.2 1985 0.2 -0.2 0.0  
MONTH TO DATE 0.0 1.3 -1.3 0.0  
SINCE SEP 1 0.0 1.3 -1.3 0.0  
SINCE JUL 1 0.0 1.3 -1.3 0.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 4 11 -7 MM  
MONTH TO DATE 88 170 -82 100  
SINCE SEP 1 88 170 -82 100  
SINCE JUL 1 134 209 -75 101  
 
COOLING  
YESTERDAY 0 0 0 MM  
MONTH TO DATE 29 31 -2 102  
SINCE SEP 1 29 31 -2 102  
SINCE JAN 1 361 483 -122 720    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION N (340)  
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION NW (330)  
AVERAGE WIND SPEED 5.7  
 
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 45 11:00 PM  
LOWEST 18 12:00 AM  
AVERAGE 32  
   
......................................................
 
 
THE LANDER WY CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 68 84 1969  
MINIMUM TEMPERATURE (F) 39 23 1985  
 
SUNRISE AND SUNSET  
SEPTEMBER 29 2023.....SUNRISE 7:10 AM MDT SUNSET 7:00 PM MDT  
SEPTEMBER 30 2023.....SUNRISE 7:11 AM MDT SUNSET 6:58 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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