Montana Department of Transportation

Malcolm “Mack” Long, Director

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Main Content

Accidents and Incidents Report

Helena Climatic Report

CDUS45 KTFX 100739

CLIHLN



CLIMATE REPORT 

NATIONAL WEATHER SERVICE GREAT FALLS MT

139 AM MDT MON MAY 10 2021



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



...THE HELENA MT CLIMATE SUMMARY FOR MAY 9 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         50    341 PM  84    1987  64    -14       61       

                                      1994                           

  MINIMUM         39   1159 PM  24    2002  39      0       36       

  AVERAGE         45                        52     -7       49     



PRECIPITATION (IN)                                                    

  YESTERDAY        0.05          1.12 1905   0.05   0.00     0.00     

  MONTH TO DATE    0.20                      0.37  -0.17     0.04     

  SINCE OCT 1      5.21                      4.55   0.66     3.86     

  SINCE JAN 1      2.61                      2.72  -0.11     2.01     



SNOWFALL (IN)                                                              

  YESTERDAY        0.0           8.0  1983   0.0    0.0      0.0      

  MONTH TO DATE    0.0                       0.1   -0.1      0.0      

  SINCE MAR 1      7.1                       7.6   -0.5     16.9      

  SINCE JUL 1     56.1                      37.2   18.9     40.4      

  SNOW DEPTH       0                                                 



DEGREE DAYS                                                           

 HEATING                                                              

  YESTERDAY       20                        13      7       16        

  MONTH TO DATE  118                       131    -13      132        

  SINCE MAR 1   1512                      1643   -131     1696        

  SINCE JUL 1   6655                      7137   -482     6893        



 COOLING                                                              

  YESTERDAY        0                         0      0        0        

  MONTH TO DATE    0                         0      0        0        

  SINCE MAR 1      0                         0      0        1        

  SINCE JAN 1      0                         0      0        1        

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





WIND (MPH)                                                            

  HIGHEST WIND SPEED    21   HIGHEST WIND DIRECTION     W (270)       

  HIGHEST GUST SPEED    30   HIGHEST GUST DIRECTION     W (280)       

  AVERAGE WIND SPEED     7.5                                        





SKY COVER                                                             

  AVERAGE SKY COVER 0.9                                                 





WEATHER CONDITIONS                                                    

THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                         

  LIGHT RAIN                                                          





RELATIVE HUMIDITY (PERCENT)

 HIGHEST    79           100 PM                                      

 LOWEST     50          1200 AM                                      

 AVERAGE    65                                                        



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THE HELENA MT CLIMATE NORMALS FOR TODAY

                         NORMAL    RECORD    YEAR                     

 MAXIMUM TEMPERATURE (F)   65        88      1940                      

 MINIMUM TEMPERATURE (F)   40        23      1946                      





SUNRISE AND SUNSETMAY 10 2021...........SUNRISE   600 AM MDT   SUNSET   850 PM MDT     

MAY 11 2021...........SUNRISE   559 AM MDT   SUNSET   851 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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