621  
CDUS45 KTFX 190842  
CLIHLN  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE GREAT FALLS MT  
242 AM MDT TUE SEP 19 2017  
 
   
...............................
 
 
   
..THE HELENA MT CLIMATE SUMMARY FOR SEPTEMBER 18 2017
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1866 TO 2017  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 64 203 PM 91 1966 72 -8 73  
MINIMUM 44 635 AM 19 1965 42 2 51  
AVERAGE 54 57 -3 62  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 2.10 1882 0.03 -0.03 T  
MONTH TO DATE 1.73 0.70 1.03 0.49  
SINCE OCT 1 9.98 10.82 -0.84 8.39  
SINCE JAN 1 7.00 9.25 -2.25 6.69  
 
SNOWFALL (IN)  
YESTERDAY 0.0 13.1 1957 0.0 0.0 0.0  
MONTH TO DATE 0.0 0.6 -0.6 0.0  
SINCE SEP 1 0.0 0.6 -0.6 0.0  
SINCE JUL 1 0.0 0.9 -0.9 0.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 11 9 2 3  
MONTH TO DATE 88 107 -19 137  
SINCE SEP 1 88 107 -19 137  
SINCE JUL 1 90 176 -86 181  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 66 22 44 12  
SINCE SEP 1 66 22 44 12  
SINCE JAN 1 702 405 297 454    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 31 HIGHEST WIND DIRECTION W (250)  
HIGHEST GUST SPEED 36 HIGHEST GUST DIRECTION W (250)  
AVERAGE WIND SPEED 7.6  
 
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 83 700 AM  
LOWEST 34 200 PM  
AVERAGE 59  
   
......................................................
 
 
 
THE HELENA MT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 71 94 2009  
MINIMUM TEMPERATURE (F) 42 25 1965  
 
 
SUNRISE AND SUNSET  
SEPTEMBER 19 2017.....SUNRISE 711 AM MDT SUNSET 731 PM MDT  
SEPTEMBER 20 2017.....SUNRISE 713 AM MDT SUNSET 729 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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