Montana Department of Transportation

Malcolm “Mack” Long, Director

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Main Content

Accidents and Incidents Report

Helena Climatic Report

CDUS45 KTFX 200744

CLIHLN



CLIMATE REPORT 

NATIONAL WEATHER SERVICE GREAT FALLS MT

144 AM MDT MON SEP 20 2021



...................................



...THE HELENA MT CLIMATE SUMMARY FOR SEPTEMBER 19 2021...



CLIMATE NORMAL PERIOD 1991 TO 2020

CLIMATE RECORD PERIOD 1866 TO 2021





WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST      

                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     

                                                  NORMAL           

...................................................................

TEMPERATURE (F)                                                          

 YESTERDAY                                                           

  MAXIMUM         64    103 AM  94    2009  72     -8       70       

  MINIMUM         49   1134 PM  25    1965  44      5       56       

  AVERAGE         57                        58     -1       63     



PRECIPITATION (IN)                                                    

  YESTERDAY        T             0.96 1925   0.04  -0.04     0.10     

  MONTH TO DATE    0.03                      0.64  -0.61     0.25     

  SINCE OCT 1      9.78                     11.08  -1.30     9.12     

  SINCE JAN 1      7.18                      9.25  -2.07     7.27     



SNOWFALL (IN)                                                              

  YESTERDAY        0.0           5.2  1925   0.0    0.0      0.0      

  MONTH TO DATE    0.0                       0.1   -0.1      0.0      

  SINCE SEP 1      0.0                       0.1   -0.1      0.0      

  SINCE JUL 1      0.0                       0.4   -0.4      0.0      

  SNOW DEPTH       0                                                 



DEGREE DAYS                                                           

 HEATING                                                              

  YESTERDAY        8                         8      0        2        

  MONTH TO DATE   44                       103    -59       69        

  SINCE SEP 1     44                       103    -59       69        

  SINCE JUL 1     91                       166    -75       88        



 COOLING                                                              

  YESTERDAY        0                         1     -1        0        

  MONTH TO DATE   37                        27     10       48        

  SINCE SEP 1     37                        27     10       48        

  SINCE JAN 1    778                       432    346      506        

...................................................................





WIND (MPH)                                                            

  HIGHEST WIND SPEED    28   HIGHEST WIND DIRECTION     W (290)       

  HIGHEST GUST SPEED    36   HIGHEST GUST DIRECTION     W (280)       

  AVERAGE WIND SPEED    12.5                                        





SKY COVER                                                             

  AVERAGE SKY COVER 0.6                                                 





WEATHER CONDITIONS                                                    

THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                         

  LIGHT RAIN                                                          





RELATIVE HUMIDITY (PERCENT)

 HIGHEST    65          1000 AM                                      

 LOWEST     31           100 AM                                      

 AVERAGE    48                                                        



..........................................................





THE HELENA MT CLIMATE NORMALS FOR TODAY

                         NORMAL    RECORD    YEAR                     

 MAXIMUM TEMPERATURE (F)   72        90      1922                      

 MINIMUM TEMPERATURE (F)   43        20      1983                      





SUNRISE AND SUNSET                                                    

SEPTEMBER 202021.....SUNRISE   713 AM MDT   SUNSET   729 PM MDT     

SEPTEMBER 21 2021.....SUNRISE   714 AM MDT   SUNSET   727 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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