Olney (IL) monthly weather averages

Contents

Average daytime temperature

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

Olney average temperature chart (Celsius) Olney average temperature chart (Fahrenheit)
Average monthly temperatures in Olney (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 2.1 4.8 11.5 18.2 23.8 29 30.7 29.6 26.2 19.7 11.9 4.8
°F 35.7 40.7 52.7 64.8 74.8 84.1 87.2 85.2 79.1 67.5 53.5 40.7

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.

Olney monthly rainfall chart (mm) Olney monthly rainfall chart (inches)
Average monthly rainfall in Olney (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 65 66 105 106 110 95 94 82 76 75 104 88
inches 2.6 2.6 4.1 4.2 4.3 3.8 3.7 3.2 3 3 4.1 3.5
Rainy days 10 9 12 12 11 9 9 8 8 8 10 11

Average annual rainfall in Olney: 1017.267mm (400.5 inches)

Average daily sunshine

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

Olney average daily sunshine chart
Average daily sunshine Olney
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.2 5.8 6.7 8.1 9.6 11.1 11 10.2 8.8 7.6 5.1 4.4

Day / night temperatures

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

Olney average minimum / maximum temperatures (Celsius) Olney average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Olney (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -7.7 -5.5 0.7 6.5 11.8 16.8 18.9 17.6 13.5 7 1.6 -4.3
Max °C 2.3 5.1 11.8 18.5 24.1 29.3 31 29.9 26.5 20.1 12.2 5.1
Min °F 18.1 22.1 33.2 43.7 53.2 62.2 65.9 63.6 56.3 44.5 34.9 24.4
Max °F 27.1 31.6 43.2 54.5 64.2 73.4 76.8 74.7 68 56.3 44.4 32.7

Sea temperature

The graph below shows the average sea temperature.

Olney average sea temperature chart (Celsius) Olney average sea temperature chart (Fahrenheit)
Average sea temperature around Olney in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 9.6 9.1 9.4 10.8 13.2 16.7 20.6 23.2 21.6 17.2 13.6 11.2
°F 49.3 48.3 48.9 51.4 55.8 62.1 69.2 73.7 70.9 63 56.5 52.1

Wind speed

The graph below shows the average wind speed.

Olney average winspeed by month (km/h) Olney average winspeed by month (mph)
Average wind speed in Olney (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 17 17 19 18 15 14 12 12 12 14 16 17
mph 11 11 12 11 9 9 7 7 8 9 10 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.

Olney relative humidity averages
Average relative humidity in Olney
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
73% 72% 69% 65% 67% 67% 71% 73% 73% 69% 72% 76%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Olney weather stats

Olney weather statistics
Hottest month: July 30.7°C 87.3°F
Driest month: January 65mm 2.6ins
Sunniest month: July 11hrs
Coldest month: January 2.1°C 35.8°F
Wettest month: May 110mm 4.3ins
Warmest sea: August 23.2°C 73.8°F
Map showing location of Olney (38.73088, -88.08532) Olney map pin © Google

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