Montana Department of Transportation

Malcolm “Mack” Long, Director

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Accidents and Incidents Report

Great Falls Climatic Report

CDUS45 KTFX 200744

CLIGTF



CLIMATE REPORT 

NATIONAL WEATHER SERVICE GREAT FALLS MT

144 AM MDT MON SEP 20 2021



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



...THE GREAT FALLS MT CLIMATE SUMMARY FOR SEPTEMBER 19 2021...



CLIMATE NORMAL PERIOD 1991 TO 2020

CLIMATE RECORD PERIOD 1886 TO 2021





WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST      

                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     

                                                  NORMAL           

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

TEMPERATURE (F)                                                          

 YESTERDAY                                                           

  MAXIMUM         64    123 PM  92    2009  70     -6       69       

  MINIMUM         40   1159 PM  26    1957  42     -2       53       

  AVERAGE         52                        56     -4       61     



PRECIPITATION (IN)                                                    

  YESTERDAY        0.03          1.51 1925   0.05  -0.02      T       

  MONTH TO DATE    0.26                      0.86  -0.60     0.49     

  SINCE OCT 1     12.97                     14.29  -1.32    14.06     

  SINCE JAN 1      9.90                     12.01  -2.11    11.36     



SNOWFALL (IN)                                                              

  YESTERDAY        0.0           0.3  1983   0.0    0.0      0.0      

  MONTH TO DATE    T                         0.2   -0.2      0.0      

  SINCE SEP 1      T                         0.2   -0.2      0.0      

  SINCE JUL 1      T                         0.5   -0.5      0.0      

  SNOW DEPTH       0                                                 



DEGREE DAYS                                                           

 HEATING                                                              

  YESTERDAY       13                         9      4        4        

  MONTH TO DATE  102                       131    -29      108        

  SINCE SEP 1    102                       131    -29      108        

  SINCE JUL 1    206                       245    -39      174        



 COOLING                                                              

  YESTERDAY        0                         1     -1        0        

  MONTH TO DATE   18                        23     -5       24        

  SINCE SEP 1     18                        23     -5       24        

  SINCE JAN 1    534                       306    228      305        

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





WIND (MPH)                                                            

  HIGHEST WIND SPEED    25   HIGHEST WIND DIRECTION     W (250)       

  HIGHEST GUST SPEED    34   HIGHEST GUST DIRECTION     W (250)       

  AVERAGE WIND SPEED    10.2                                        





SKY COVER                                                             

  AVERAGE SKY COVER 0.4                                                 





WEATHER CONDITIONS                                                    

THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                         

  LIGHT RAIN                                                          





RELATIVE HUMIDITY (PERCENT)

 HIGHEST    70          1100 PM                                      

 LOWEST     56           600 PM                                      

 AVERAGE    63                                                        



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





THE GREAT FALLS MT CLIMATE NORMALS FOR TODAY

                         NORMAL    RECORD    YEAR                     

 MAXIMUM TEMPERATURE (F)   70        93      1917                      

 MINIMUM TEMPERATURE (F)   42        24      1995                      





SUNRISE AND SUNSET                                                    

SEPTEMBER 20 2021.....SUNRISE   710 AM MDT   SUNSET   727 PM MDT     

SEPTEMBER 21 2021.....SUNRISE   711 AM MDT   SUNSET   724 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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