Polson (MT) monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Polson

Polson average temperature chart (Celsius) Polson average temperature chart (Fahrenheit)
Average monthly temperatures in Polson (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C -1.3 2.5 7.2 13.1 18.1 22.6 27.2 26.7 20.2 13 4.2 -0.4
°F 29.6 36.4 44.9 55.6 64.7 72.6 81 80.1 68.4 55.4 39.6 31.3

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.

Polson monthly rainfall chart (mm) Polson monthly rainfall chart (inches)
Average monthly rainfall in Polson (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 34 23 27 32 57 62 32 35 36 26 29 34
inches 1.4 0.9 1.1 1.3 2.2 2.4 1.2 1.4 1.4 1 1.2 1.4
Rainy days 14 10 11 10 11 11 7 8 8 8 12 14

Average annual rainfall in Polson: 361.367mm (142.3 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Polson

Polson average daily sunshine chart
Average daily sunshine Polson
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 3 4.6 6.5 8 9.1 10.5 13.3 11.5 8.8 6.1 3.3 2.6

Day / night temperatures

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

Polson average minimum / maximum temperatures (Celsius) Polson average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Polson (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -9.9 -7.1 -4.3 -0.5 3.5 7.1 8.8 8.3 4 -0.8 -4.5 -8.6
Max °C -1.1 2.7 7.5 13.5 18.5 23 27.7 27.2 20.6 13.4 4.5 -0.2
Min °F 14.2 19.2 24.4 31.2 38.3 44.7 47.8 46.9 39.2 30.7 24 16.5
Max °F 22.1 28 34.9 43.7 51.8 59 64.8 63.9 54.1 43.3 32 24.1

Sea temperature

The graph below shows the average sea temperature.

Polson average sea temperature chart (Celsius) Polson average sea temperature chart (Fahrenheit)
Average sea temperature around Polson in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 7.4 7.3 7.4 7.9 8.8 10.4 12.3 13.7 13.1 11.2 9.2 7.9
°F 45.3 45.2 45.4 46.1 47.8 50.7 54.1 56.6 55.5 52.1 48.6 46.3

Wind speed

The graph below shows the average wind speed.

Polson average winspeed by month (km/h) Polson average winspeed by month (mph)
Average wind speed in Polson (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 11 11 13 15 14 13 12 12 12 10 11 10
mph 7 7 8 9 9 8 8 7 7 7 7 7

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.

Polson relative humidity averages
Average relative humidity in Polson
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
78% 76% 69% 60% 61% 61% 55% 55% 63% 70% 78% 81%