Decorah (IA) monthly weather averages

Contents

Average daytime temperature

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

Decorah average temperature chart (Celsius) Decorah average temperature chart (Fahrenheit)
Average monthly temperatures in Decorah (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C -5 -1.6 5.3 14.3 21.2 26.2 28.4 27 22.2 15.8 6.3 -2.3
°F 23 29.1 41.6 57.8 70.1 79.2 83.2 80.7 72 60.4 43.3 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.

Decorah monthly rainfall chart (mm) Decorah monthly rainfall chart (inches)
Average monthly rainfall in Decorah (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 24 25 52 83 99 107 108 106 92 61 48 33
inches 0.9 1 2 3.3 3.9 4.2 4.3 4.2 3.6 2.4 1.9 1.3
Rainy days 8 7 10 11 11 11 10 9 10 8 8 9

Average annual rainfall in Decorah: 789.3mm (310.7 inches)

Average daily sunshine

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

Decorah average daily sunshine chart
Average daily sunshine Decorah
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.7 7.4 7.5 8.5 10 10.7 10.9 9.9 7.9 7 4.7 4.5

Day / night temperatures

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

Decorah average minimum / maximum temperatures (Celsius) Decorah average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Decorah (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -15.1 -12.3 -5 2 8.3 13.3 15.9 14.5 9.9 3.7 -3.3 -11.3
Max °C -4.8 -1.4 5.6 14.7 21.5 26.6 28.8 27.4 22.6 16.1 6.5 -2.1
Min °F 4.9 10 23 35.5 46.9 55.9 60.5 58 49.7 38.7 26.1 11.7
Max °F 14.2 19.8 32.5 46.9 58.8 67.8 72.1 69.6 61.2 49.8 34.9 19.9

Sea temperature

The graph below shows the average sea temperature.

Decorah average sea temperature chart (Celsius) Decorah average sea temperature chart (Fahrenheit)
Average sea temperature around Decorah in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 6.9 6.6 6.9 7.9 9.5 11.7 14.9 18.6 17.4 13.3 10.1 8.1
°F 44.5 43.9 44.5 46.2 49 53 58.8 65.4 63.2 55.9 50.2 46.6

Wind speed

The graph below shows the average wind speed.

Decorah average winspeed by month (km/h) Decorah average winspeed by month (mph)
Average wind speed in Decorah (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 19 18 20 21 18 17 15 15 16 18 19 18
mph 12 11 12 13 11 11 9 9 10 11 12 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.

Decorah relative humidity averages
Average relative humidity in Decorah
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
74% 74% 72% 66% 66% 69% 72% 75% 76% 71% 75% 78%

Other monthly averages

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Decorah weather stats

Decorah weather statistics
Hottest month: July 28.4°C 83.1°F
Driest month: January 24mm 0.9ins
Sunniest month: July 10.9hrs
Coldest month: January -5°C 23°F
Wettest month: July 108mm 4.3ins
Warmest sea: August 18.6°C 65.5°F
Map showing location of Decorah (43.30331, -91.78571) Decorah map pin © Google

Locations nearby

Top United States locations