997  
CXUS55 KTFX 011210  
CLMHLN  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE GREAT FALLS MT  
508 AM MST THU FEB 1 2018  
   
...............................
 
 
   
..THE HELENA MT CLIMATE SUMMARY FOR THE MONTH OF JANUARY 2018
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1866 TO 2018  
 
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S  
VALUE DATE(S) VALUE FROM VALUE DATE(S)  
NORMAL    
............................................................
 
 
TEMPERATURE (F)  
RECORD  
HIGH 63 01/25/2015  
01/07/1902  
02/27/1932  
LOW -42 01/25/1957  
01/31/1893  
HIGHEST 51 01/30 33 18 45 01/30  
LOWEST -17 01/02 9 -26 -16 01/05  
AVG. MAXIMUM 32.0 33.3 -1.3 20.7  
AVG. MINIMUM 13.0 13.0 0.0 1.8  
MEAN 22.5 23.1 -0.6 11.2  
DAYS MAX >= 90 0 0.0 0.0 0  
DAYS MAX <= 32 12 11.8 0.2 24  
DAYS MIN <= 32 31 29.0 2.0 31  
DAYS MIN <= 0 5 6.3 -1.3 14  
 
PRECIPITATION (INCHES)  
RECORD  
MAXIMUM 3.75 1884  
MINIMUM T 1987  
TOTALS 0.34 0.36 -0.02 0.62  
DAYS >= .01 6 6.2 -0.2  
DAYS >= .10 2 1.1 0.9  
DAYS >= .50 0 0.0 0.0  
DAYS >= 1.00 0 0.0 0.0  
GREATEST  
24 HR. TOTAL 0.11 01/11 TO 01/11  
 
SNOWFALL (INCHES)  
RECORDS  
TOTAL 35.6 1969  
24 HR TOTAL 14.1 01/20/1969 TO 01/21/1969  
TOTALS 3.4 6.2 -2.8 12.7  
SINCE 7/1 35.4 22.3 13.1  
SNOWDEPTH AVG. 6  
DAYS >= TRACE 8 5.6 2.4  
DAYS >= 1.0 2 2.2 -0.2  
GREATEST  
SNOW DEPTH 9 01/05  
01/04  
01/03  
24 HR TOTAL 1.6 01/10 TO 01/10  
 
DEGREE_DAYS  
HEATING TOTAL 1311 1297 14 1661  
SINCE 7/1 4644 4518 126 4678  
COOLING TOTAL 0 0 0 0  
SINCE 1/1 0 0 0 0    
.............................................................
 
 
WIND (MPH)  
AVERAGE WIND SPEED 4.3  
HIGHEST WIND SPEED/DIRECTION 32/250 DATE 01/30  
HIGHEST GUST SPEED/DIRECTION 42/240 DATE 01/30  
 
SKY COVER  
AVERAGE SKY COVER 0.40  
 
AVERAGE RH (PERCENT) 75  
 
WEATHER CONDITIONS. NUMBER OF DAYS WITH  
THUNDERSTORM 0 MIXED PRECIP 0  
HEAVY RAIN 0 RAIN 0  
LIGHT RAIN 3 FREEZING RAIN 0  
LT FREEZING RAIN 1 HAIL 0  
HEAVY SNOW 0 SNOW 1  
LIGHT SNOW 8 SLEET 0  
FOG 15 FOG W/VIS <= 1/4 MILE 2  
HAZE 10  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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