133  
CDUS45 KRIW 180728  
CLILND  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE RIVERTON WY  
1228 AM MST MON DEC 18 2023  
   
...............................
 
 
   
..THE LANDER WY CLIMATE SUMMARY FOR DECEMBER 17 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 49 1:57 PM 62 1980 32 17 7  
MINIMUM 24 11:43 PM -29 1924 9 15 -6  
AVERAGE 37 21 16  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.38 1924 0.02 -0.02 0.00  
MONTH TO DATE 0.03 0.36 -0.33 0.91  
SINCE DEC 1 0.03 0.36 -0.33 0.91  
SINCE JAN 1 17.04 12.96 4.08 13.51  
 
SNOWFALL (IN)  
YESTERDAY 0.0 5.5 1968 0.3 -0.3 0.0  
MONTH TO DATE 0.1 5.3 -5.2 9.1  
SINCE DEC 1 0.1 5.3 -5.2 9.1  
SINCE JUL 1 24.3 27.9 -3.6 23.3  
SNOW DEPTH 2  
 
DEGREE DAYS  
HEATING  
YESTERDAY 28 44 -16 64  
MONTH TO DATE 651 721 -70 777  
SINCE DEC 1 651 721 -70 777  
SINCE JUL 1 2259 2549 -290 2524  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 361 485 -124 720    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION SW (240)  
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION SW (230)  
AVERAGE WIND SPEED 5.8  
 
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 68 1:00 AM  
LOWEST 30 2:00 PM  
AVERAGE 49  
   
......................................................
 
 
THE LANDER WY CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 32 55 1954  
1979  
MINIMUM TEMPERATURE (F) 9 -36 1924  
 
SUNRISE AND SUNSET  
DECEMBER 18 2023......SUNRISE 7:41 AM MST SUNSET 4:42 PM MST  
DECEMBER 19 2023......SUNRISE 7:41 AM MST SUNSET 4:43 PM MST  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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