Helena Valley Southeast (MT) monthly weather averages

Contents

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Helena Valley Southeast

Helena Valley Southeast average temperature chart (Celsius) Helena Valley Southeast average temperature chart (Fahrenheit)
Average monthly temperatures in Helena Valley Southeast (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C -1.4 2.5 6.6 12.8 18 23.6 28.8 27.8 20.5 14.3 5.5 -0.5
°F 29.5 36.5 43.9 55 64.4 74.5 83.8 82 68.9 57.8 41.8 31.2

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Helena Valley Southeast monthly rainfall chart (mm) Helena Valley Southeast monthly rainfall chart (inches)
Average monthly rainfall in Helena Valley Southeast (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 15 11 19 27 49 52 31 32 27 18 15 14
inches 0.6 0.4 0.8 1 1.9 2.1 1.2 1.3 1.1 0.7 0.6 0.6
Rainy days 9 7 9 8 11 10 7 8 7 5 7 8

Average annual rainfall in Helena Valley Southeast: 243.666mm (95.9 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Helena Valley Southeast

Helena Valley Southeast average daily sunshine chart
Average daily sunshine Helena Valley Southeast
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 4.4 5.9 8 8.7 9.7 11 12.8 11.3 9.2 7.2 4.5 3.8

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Helena Valley Southeast average minimum / maximum temperatures (Celsius) Helena Valley Southeast average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Helena Valley Southeast (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -12.5 -9 -5.7 -1.1 3.9 8.6 11.4 10.4 4.7 -0.3 -6.4 -11.6
Max °C -1.1 2.8 6.9 13.1 18.4 24 29.2 28.2 20.9 14.7 5.8 -0.2
Min °F 9.5 15.8 21.7 30 38.9 47.5 52.5 50.7 40.5 31.5 20.6 11.1
Max °F 19.8 26.4 33.1 42.8 52 61.3 68.5 66.7 55 45 31.5 21.4

Sea temperature

The graph below shows the average sea temperature.

Helena Valley Southeast average sea temperature chart (Celsius) Helena Valley Southeast average sea temperature chart (Fahrenheit)
Average sea temperature around Helena Valley Southeast in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 7.6 7.5 7.7 8.1 9.1 10.8 12.8 14.5 13.8 11.7 9.6 8.2
°F 45.7 45.5 45.8 46.7 48.5 51.5 55.1 58 56.8 53.1 49.3 46.8

Wind speed

The graph below shows the average wind speed.

Helena Valley Southeast average winspeed by month (km/h) Helena Valley Southeast average winspeed by month (mph)
Average wind speed in Helena Valley Southeast (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 14 14 16 17 16 15 14 13 14 14 14 14
mph 9 9 10 11 10 9 9 8 9 9 9 9

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Helena Valley Southeast relative humidity averages
Average relative humidity in Helena Valley Southeast
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
66% 64% 60% 54% 54% 52% 46% 48% 55% 58% 65% 68%

Other monthly averages

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Helena Valley Southeast weather stats

Helena Valley Southeast weather statistics
Hottest month: July 28.8°C 83.8°F
Driest month: February 11mm 0.4ins
Sunniest month: July 12.8hrs
Coldest month: January -1.4°C 29.5°F
Wettest month: June 52mm 2ins
Warmest sea: August 14.5°C 58.1°F
Map showing location of Helena Valley Southeast (46.61527, -111.92156) Helena Valley Southeast map pin © Google

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