Glacier National Park (MT) monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Glacier National Park

Glacier National Park average temperature chart (Celsius) Glacier National Park average temperature chart (Fahrenheit)
Average monthly temperatures in Glacier National Park (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C -2.9 -0.4 2.2 7.5 12.7 17.3 21.5 21 15.7 10 1.7 -2.3
°F 26.8 31.3 36 45.5 54.9 63.1 70.7 69.7 60.3 50.1 35 27.8

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.

Glacier National Park monthly rainfall chart (mm) Glacier National Park monthly rainfall chart (inches)
Average monthly rainfall in Glacier National Park (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 62 51 56 60 79 82 50 54 54 43 55 58
inches 2.4 2 2.2 2.4 3.1 3.2 2 2.1 2.1 1.7 2.2 2.3
Rainy days 11 10 13 11 10 9 7 8 9 8 11 12

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Glacier National Park

Glacier National Park average daily sunshine chart
Average daily sunshine Glacier National Park
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 3.3 4.8 6 7.2 8.4 9.6 12 10.4 7.6 6.1 3.7 2.9

Day / night temperatures

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

Glacier National Park average minimum / maximum temperatures (Celsius) Glacier National Park average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Glacier National Park (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -12.4 -10.3 -7.3 -3 1.4 5.1 7.4 6.9 3.2 -0.7 -7.1 -11.5
Max °C -2.7 -0.2 2.5 7.8 13 17.6 21.9 21.3 16 10.3 1.9 -2.1
Min °F 9.8 13.6 19 26.7 34.5 41.1 45.2 44.4 37.8 30.7 19.2 11.3
Max °F 18.5 22.6 27.7 36.3 45 52.3 58.3 57.4 49.3 40.6 27.3 19.8

Sea temperature

The graph below shows the average sea temperature.

Glacier National Park average sea temperature chart (Celsius) Glacier National Park average sea temperature chart (Fahrenheit)
Average sea temperature around Glacier National Park in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 6.8 6.7 6.9 7.3 8.3 9.9 11.9 13.4 12.7 10.6 8.6 7.3
°F 44.2 44.1 44.3 45.1 46.9 49.8 53.3 56.1 54.9 51.2 47.5 45.1

Wind speed

The graph below shows the average wind speed.

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

Glacier National Park relative humidity averages
Average relative humidity in Glacier National Park
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
71% 70% 65% 59% 58% 60% 57% 57% 62% 63% 72% 73%

Other monthly averages

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Glacier National Park weather stats

Glacier National Park weather statistics
Hottest month: July 21.5°C 70.7°F
Driest month: October 43mm 1.7ins
Sunniest month: July 12hrs
Coldest month: January -2.9°C 26.8°F
Wettest month: June 82mm 3.2ins
Warmest sea: August 13.4°C 56.1°F
Map showing location of Glacier National Park (48.68306, -113.80031)

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