Jerseyville (IL) monthly weather averages

Contents

Average daytime temperature

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

Jerseyville average temperature chart (Celsius) Jerseyville average temperature chart (Fahrenheit)
Average monthly temperatures in Jerseyville (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 2.1 4.8 11.5 18.6 23.8 28.8 31 29.7 25.9 19.8 11.8 4.5
°F 35.8 40.6 52.8 65.4 74.9 83.8 87.7 85.5 78.6 67.6 53.3 40.1

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.

Jerseyville monthly rainfall chart (mm) Jerseyville monthly rainfall chart (inches)
Average monthly rainfall in Jerseyville (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 42 48 82 94 107 92 94 79 84 68 74 67
inches 1.7 1.9 3.2 3.7 4.2 3.6 3.7 3.1 3.3 2.7 2.9 2.6
Rainy days 9 8 12 11 11 9 9 8 8 8 10 10

Average annual rainfall in Jerseyville: 878.733mm (346 inches)

Average daily sunshine

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

Jerseyville average daily sunshine chart
Average daily sunshine Jerseyville
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.7 6.1 6.7 8 9.3 10.6 10.8 9.6 8.5 7.4 5.2 4.7

Day / night temperatures

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

Jerseyville average minimum / maximum temperatures (Celsius) Jerseyville average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Jerseyville (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -8 -5.7 0.4 6.8 11.9 17.2 19.6 18 14 7.6 1.5 -4.8
Max °C 2.4 5.1 11.8 18.9 24.1 29.1 31.3 30 26.2 20.1 12.1 4.8
Min °F 17.7 21.8 32.7 44.2 53.4 62.9 67.2 64.4 57.2 45.6 34.7 23.5
Max °F 27 31.5 43 55 64.4 73.6 77.7 75.2 68.2 56.8 44.2 32

Sea temperature

The graph below shows the average sea temperature.

Jerseyville average sea temperature chart (Celsius) Jerseyville average sea temperature chart (Fahrenheit)
Average sea temperature around Jerseyville in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 9.4 9 9.5 10.7 12.8 15.4 18.6 21.8 20.4 16.2 12.9 10.8
°F 49 48.2 49 51.3 55 59.6 65.5 71.3 68.7 61.1 55.3 51.4

Wind speed

The graph below shows the average wind speed.

Jerseyville average winspeed by month (km/h) Jerseyville average winspeed by month (mph)
Average wind speed in Jerseyville (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 19 19 21 20 17 16 14 14 14 16 18 19
mph 12 12 13 13 11 10 9 9 9 10 11 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.

Jerseyville relative humidity averages
Average relative humidity in Jerseyville
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
73% 73% 69% 64% 67% 67% 69% 71% 72% 69% 73% 76%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Jerseyville weather stats

Jerseyville weather statistics
Hottest month: July 31°C 87.8°F
Driest month: January 42mm 1.7ins
Sunniest month: July 10.8hrs
Coldest month: January 2.1°C 35.8°F
Wettest month: May 107mm 4.2ins
Warmest sea: August 21.8°C 71.2°F
Map showing location of Jerseyville (39.12005, -90.32845) Jerseyville map pin © Google

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