172  
CDUS45 KRIW 220734  
CLIP60  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE RIVERTON WY  
133 AM MDT SUN OCT 22 2017  
 
   
...............................
 
 
   
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR OCTOBER 21 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 28 315 PM 63 2003 46 -18 49  
MINIMUM 18 315 AM 13 2007 22 -4 25  
AVERAGE 23 34 -11 37  
 
PRECIPITATION (IN)  
YESTERDAY 0.03 0.13 2008 0.04 -0.01 0.00  
MONTH TO DATE 0.48 0.85 -0.37 3.95  
SINCE SEP 1 3.81 2.15 1.66 6.60  
SINCE JAN 1 26.11 16.22 9.89 17.83  
 
DEGREE DAYS  
HEATING  
YESTERDAY 42 31 11 28  
MONTH TO DATE 654 578 76 623  
SINCE SEP 1 1251 1126 125 1186  
SINCE JUL 1 1804 1713 91 1769  
 
COOLING  
YESTERDAY 0 0 0 0  
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 12 HIGHEST WIND DIRECTION W (280)  
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION W (270)  
AVERAGE WIND SPEED 4.9  
 
 
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 92 1100 PM  
LOWEST 68 400 PM  
AVERAGE 80  
   
......................................................
 
 
 
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 45 66 2003  
MINIMUM TEMPERATURE (F) 22 5 2006  
 
 
SUNRISE AND SUNSET  
OCTOBER 22 2017.......SUNRISE 746 AM MDT SUNSET 625 PM MDT  
OCTOBER 23 2017.......SUNRISE 748 AM MDT SUNSET 624 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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