826  
CXUS55 KTFX 010917  
CLMHLN  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE GREAT FALLS MT  
317 AM MDT WED NOV 1 2017  
   
...............................
 
 
   
..THE HELENA MT CLIMATE SUMMARY FOR THE MONTH OF OCTOBER 2017
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1866 TO 2017  
 
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S  
VALUE DATE(S) VALUE FROM VALUE DATE(S)  
NORMAL    
............................................................
 
 
TEMPERATURE (F)  
RECORD  
HIGH 87 10/10/2015  
10/01/2001  
10/01/1997  
LOW -8 10/30/1991  
HIGHEST 78 10/19 64 14 73 10/09  
LOWEST 22 10/31 27 -5 22 10/12  
AVG. MAXIMUM 57.5 58.7 -1.2 58.4  
AVG. MINIMUM 32.4 32.5 -0.1 37.6  
MEAN 44.9 45.6 -0.7 48.0  
DAYS MAX >= 90 0 0.0 0.0 0  
DAYS MAX <= 32 0 0.6 -0.6 0  
DAYS MIN <= 32 17 13.6 3.4 6  
DAYS MIN <= 0 0 0.0 0.0 0  
 
PRECIPITATION (INCHES)  
RECORD  
MAXIMUM 2.81 1925  
MINIMUM 0.01 1996  
TOTALS 0.44 0.68 -0.24 1.68  
DAYS >= .01 7 6.2 0.8  
DAYS >= .10 3 2.1 0.9  
DAYS >= .50 0 0.2 -0.2  
DAYS >= 1.00 0 0.0 0.0  
GREATEST  
24 HR. TOTAL 0.14 10/02 TO 10/02  
 
SNOWFALL (INCHES)  
RECORDS  
TOTAL 27.7 1925  
24 HR TOTAL 14.0 10/11/1891 TO 10/11/1891  
TOTALS 1.2 2.4 -1.2 1.0  
SINCE 7/1 1.2 4.0 -2.8  
SNOWDEPTH AVG. 0  
DAYS >= TRACE 4 1.8 2.2  
DAYS >= 1.0 1 0.8 0.2  
GREATEST  
SNOW DEPTH 1 10/03  
24 HR TOTAL 1.2 10/02 TO 10/02  
 
DEGREE_DAYS  
HEATING TOTAL 616 602 14 519  
SINCE 7/1 886 908 -22 773  
COOLING TOTAL 0 0 0 0  
SINCE 1/1 702 406 296 455    
.............................................................
 
 
WIND (MPH)  
AVERAGE WIND SPEED 7.7  
HIGHEST WIND SPEED/DIRECTION 43/260 DATE 10/22  
HIGHEST GUST SPEED/DIRECTION 56/260 DATE 10/22  
 
SKY COVER  
AVERAGE SKY COVER 0.30  
 
AVERAGE RH (PERCENT) 58  
 
WEATHER CONDITIONS. NUMBER OF DAYS WITH  
THUNDERSTORM 0 MIXED PRECIP 0  
HEAVY RAIN 0 RAIN 1  
LIGHT RAIN 7 FREEZING RAIN 0  
LT FREEZING RAIN 0 HAIL 0  
HEAVY SNOW 0 SNOW 0  
LIGHT SNOW 6 SLEET 0  
FOG 9 FOG W/VIS <= 1/4 MILE 1  
HAZE 0  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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