Ottumwa (IA) monthly weather averages

Contents

Average daytime temperature

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

Ottumwa average temperature chart (Celsius) Ottumwa average temperature chart (Fahrenheit)
Average monthly temperatures in Ottumwa (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C -1.5 1.4 8.6 16.7 22.7 27.9 30 28.5 24.2 17.9 9.3 1
°F 29.2 34.5 47.6 62 72.9 82.3 86.1 83.3 75.6 64.2 48.7 33.8

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.

Ottumwa monthly rainfall chart (mm) Ottumwa monthly rainfall chart (inches)
Average monthly rainfall in Ottumwa (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 27 25 63 89 100 106 112 105 98 61 51 35
inches 1.1 1 2.5 3.5 3.9 4.2 4.4 4.1 3.9 2.4 2 1.4
Rainy days 8 8 10 11 12 10 9 9 9 8 8 9

Average annual rainfall in Ottumwa: 820.666mm (323.1 inches)

Average daily sunshine

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

Ottumwa average daily sunshine chart
Average daily sunshine Ottumwa
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.7 6.5 7 8.1 9.5 10.8 11.1 10.1 8.4 7.3 5.1 4.7

Day / night temperatures

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

Ottumwa average minimum / maximum temperatures (Celsius) Ottumwa average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Ottumwa (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -11.1 -8.7 -1.9 5.1 11 16.4 18.9 17.3 12.7 6.3 -0.3 -7.6
Max °C -1.3 1.7 8.9 17 23 28.2 30.3 28.8 24.5 18.2 9.5 1.2
Min °F 12 16.4 28.6 41.1 51.8 61.5 66 63.1 54.9 43.3 31.5 18.3
Max °F 20.8 25.7 38.3 51.8 62.6 72.1 76.3 73.4 65.5 54 40.3 26.2

Sea temperature

The graph below shows the average sea temperature.

Ottumwa average sea temperature chart (Celsius) Ottumwa average sea temperature chart (Fahrenheit)
Average sea temperature around Ottumwa in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 8.9 8.6 9.1 10.3 12.2 14.5 17.2 20.1 18.9 15.3 12.2 10.1
°F 48 47.5 48.4 50.6 53.9 58.1 62.9 68.1 66.1 59.5 53.9 50.2

Wind speed

The graph below shows the average wind speed.

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

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.

Ottumwa relative humidity averages
Average relative humidity in Ottumwa
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
71% 72% 69% 64% 66% 67% 70% 72% 72% 68% 72% 75%

Other monthly averages

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Ottumwa weather stats

Ottumwa weather statistics
Hottest month: July 30°C 86°F
Driest month: February 25mm 1ins
Sunniest month: July 11.1hrs
Coldest month: January -1.5°C 29.3°F
Wettest month: July 112mm 4.4ins
Warmest sea: August 20.1°C 68.2°F
Map showing location of Ottumwa (41.02001, -92.4113) Ottumwa map pin © Google

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