020  
CDUS45 KRIW 190733  
CLIP60  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE RIVERTON WY  
133 AM MDT THU SEP 19 2024  
   
...............................  
 
   
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR SEPTEMBER 18 2024  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1998 TO 2024  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................  
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 46 11:59 AM 75 2009 60 -14 MM  
MINIMUM 33 12:23 AM 18 2003 30 3 MM  
AVERAGE 40 45 -5 MM  
 
PRECIPITATION (IN)  
YESTERDAY 0.27 0.53 2013 0.06 0.21 0.00  
MONTH TO DATE 1.43 0.91 0.52 1.88  
SINCE SEP 1 1.43 0.91 0.52 1.88  
SINCE JAN 1 16.62 16.17 0.45 19.91  
 
DEGREE DAYS  
HEATING  
YESTERDAY 25 20 5 MM  
MONTH TO DATE 271 316 -45 246  
SINCE SEP 1 271 316 -45 246  
SINCE JUL 1 848 958 -110 779  
 
COOLING  
YESTERDAY 0 0 0 MM  
MONTH TO DATE 0 0 0 0  
SINCE SEP 1 0 0 0 0  
SINCE JAN 1 0 0 0 0    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION W (260)  
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION W (270)  
AVERAGE WIND SPEED 5.4  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 97 5:00 AM  
LOWEST 79 12:00 PM  
AVERAGE 88  
   
......................................................  
 
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 59 72 2009  
2010  
MINIMUM TEMPERATURE (F) 30 22 2003  
 
SUNRISE AND SUNSET  
SEPTEMBER 19 2024.....SUNRISE 7:06 AM MDT SUNSET 7:24 PM MDT  
SEPTEMBER 20 2024.....SUNRISE 7:07 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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