Superior (WI) monthly weather averages

Average daytime temperature

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

Superior average temperature chart (Celsius) Superior average temperature chart (Fahrenheit)
Average monthly temperatures in Superior (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C -7.6 -4.5 1.6 9.8 16.7 21.7 25.3 23.8 18.5 12.3 3 -5
°F 18.3 23.9 34.9 49.7 62.1 71.1 77.6 74.9 65.3 54.1 37.3 23

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.

Superior monthly rainfall chart (mm) Superior monthly rainfall chart (inches)
Average monthly rainfall in Superior (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 27 18 44 56 80 98 93 100 96 60 44 29
inches 1.1 0.7 1.7 2.2 3.2 3.8 3.7 3.9 3.8 2.4 1.7 1.1
Rainy days 12 9 11 10 12 12 11 11 12 10 10 11

Average annual rainfall in Superior: 699.867mm (275.5 inches)

Average daily sunshine

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

Superior average daily sunshine chart
Average daily sunshine Superior
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 4.9 5.9 6.7 8.3 9.3 10 10.9 9.3 7.1 5.4 3.7 3.8

Day / night temperatures

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

Superior average minimum / maximum temperatures (Celsius) Superior average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Superior (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -18.1 -15.4 -8.3 -1.1 4.4 9.2 13 12.3 7.7 2.3 -5 -14
Max °C -7.4 -4.3 1.9 10.1 17 22.1 25.7 24.1 18.8 12.5 3.2 -4.8
Min °F -0.5 4.4 17.2 30 39.9 48.5 55.3 54.1 45.8 36.1 23.1 6.8
Max °F 9.1 14.4 26.2 40.1 51.3 60.1 66.7 64.8 55.8 45.3 30.4 15.1

Sea temperature

The graph below shows the average sea temperature.

Superior average sea temperature chart (Celsius) Superior average sea temperature chart (Fahrenheit)
Average sea temperature around Superior in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 5.2 5 5.2 6 7.3 9.3 12.4 16.4 15.3 11.3 8.1 6.2
°F 41.4 40.9 41.4 42.8 45.1 48.7 54.4 61.5 59.5 52.4 46.7 43.1

Wind speed

The graph below shows the average wind speed.

Superior average winspeed by month (km/h) Superior average winspeed by month (mph)
Average wind speed in Superior (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 18 17 18 19 17 16 14 14 16 17 17 17
mph 11 10 11 12 11 10 9 9 10 10 11 11

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.

Superior relative humidity averages
Average relative humidity in Superior
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
72% 70% 69% 64% 63% 70% 71% 74% 76% 71% 75% 76%