Denison (IA) monthly weather averages

Contents

Average daytime temperature

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

Denison average temperature chart (Celsius) Denison average temperature chart (Fahrenheit)
Average monthly temperatures in Denison (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C -2.9 0.2 6.9 15.7 22.3 27.4 29.6 27.9 23.4 17.2 7.8 -0.9
°F 26.7 32.3 44.5 60.3 72.1 81.3 85.3 82.3 74.1 63 46 30.3

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.

Denison monthly rainfall chart (mm) Denison monthly rainfall chart (inches)
Average monthly rainfall in Denison (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 18 20 52 74 107 115 102 102 88 57 34 22
inches 0.7 0.8 2 2.9 4.2 4.5 4 4 3.5 2.2 1.3 0.9
Rainy days 7 7 9 10 12 10 10 9 9 7 7 8

Average annual rainfall in Denison: 737.166mm (290.2 inches)

Average daily sunshine

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

Denison average daily sunshine chart
Average daily sunshine Denison
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 6 6.3 7.3 8.2 9.5 11.1 11.5 10.2 8.6 7.4 5.2 4.8

Day / night temperatures

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

Denison average minimum / maximum temperatures (Celsius) Denison average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Denison (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -14 -11.1 -4.6 2.2 8.8 14.1 16.9 15.2 10.1 3.7 -3.5 -11.1
Max °C -2.7 0.5 7.2 16.1 22.6 27.7 30 28.3 23.7 17.6 8.1 -0.7
Min °F 6.9 12.1 23.7 35.9 47.8 57.4 62.3 59.3 50.2 38.6 25.8 12
Max °F 17.1 22.5 34.3 48.4 60.3 69.6 74.1 71.1 62.4 51.1 36.1 21.4

Sea temperature

The graph below shows the average sea temperature.

Denison average sea temperature chart (Celsius) Denison average sea temperature chart (Fahrenheit)
Average sea temperature around Denison in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 8.6 8.4 8.9 9.9 11.6 13.8 16.4 19.1 18 14.6 11.6 9.7
°F 47.6 47.1 47.9 49.9 52.9 56.9 61.6 66.4 64.4 58.3 52.9 49.4

Wind speed

The graph below shows the average wind speed.

Denison average winspeed by month (km/h) Denison average winspeed by month (mph)
Average wind speed in Denison (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 19 19 21 22 19 17 16 15 16 17 18 18
mph 12 12 13 14 12 11 10 9 10 11 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.

Denison relative humidity averages
Average relative humidity in Denison
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
72% 72% 68% 62% 63% 66% 69% 71% 72% 67% 72% 75%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Denison weather stats

Denison weather statistics
Hottest month: July 29.6°C 85.3°F
Driest month: January 18mm 0.7ins
Sunniest month: July 11.5hrs
Coldest month: January -2.9°C 26.8°F
Wettest month: June 115mm 4.5ins
Warmest sea: August 19.1°C 66.4°F
Map showing location of Denison (42.01777, -95.35528) Denison map pin © Google

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