660  
CDUS45 KRIW 180729  
CLIP60  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE RIVERTON WY  
129 AM MDT FRI AUG 18 2017  
 
   
...............................
 
 
   
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR AUGUST 17 2017
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1998 TO 2017  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 69 451 PM 82 2013 72 -3 74  
MINIMUM 41 1159 PM 28 2009 39 2 39  
AVERAGE 55 55 0 57  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.62 2007 0.05 -0.05 0.00  
MONTH TO DATE 0.77 0.79 -0.02 0.06  
SINCE JUN 1 4.55 4.26 0.29 1.92  
SINCE JAN 1 21.76 13.34 8.42 10.98  
 
DEGREE DAYS  
HEATING  
YESTERDAY 10 10 0 8  
MONTH TO DATE 189 146 43 97  
SINCE JUN 1 911 922 -11 773  
SINCE JUL 1 415 429 -14 405  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE JUN 1 0 0 0 0  
SINCE JAN 1 0 0 0 0    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION W (280)  
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION W (280)  
AVERAGE WIND SPEED 3.5  
 
 
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 96 300 AM  
LOWEST 26 300 PM  
AVERAGE 61  
   
......................................................
 
 
 
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 72 80 2013  
2001  
MINIMUM TEMPERATURE (F) 38 29 2015  
 
 
SUNRISE AND SUNSET  
AUGUST 18 2017........SUNRISE 628 AM MDT SUNSET 822 PM MDT  
AUGUST 19 2017........SUNRISE 629 AM MDT SUNSET 820 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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