Princeton (IL) monthly weather averages

Contents

Average daytime temperature

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

Princeton average temperature chart (Celsius) Princeton average temperature chart (Fahrenheit)
Average monthly temperatures in Princeton (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C -2.3 0.5 7.8 15.9 22.2 27.6 29.3 28.2 24.4 17.8 8.8 0.6
°F 27.9 32.8 46 60.5 72 81.8 84.8 82.8 75.9 64 47.9 33.1

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.

Princeton monthly rainfall chart (mm) Princeton monthly rainfall chart (inches)
Average monthly rainfall in Princeton (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 35 31 70 97 98 104 97 98 97 66 64 52
inches 1.4 1.2 2.8 3.8 3.9 4.1 3.8 3.9 3.8 2.6 2.5 2
Rainy days 10 8 11 12 11 10 10 9 9 9 10 11

Average annual rainfall in Princeton: 860.5mm (338.8 inches)

Average daily sunshine

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

Princeton average daily sunshine chart
Average daily sunshine Princeton
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.2 6 6.5 7.8 9.4 10.8 10.7 9.7 8.2 7 4.5 4.2

Day / night temperatures

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

Princeton average minimum / maximum temperatures (Celsius) Princeton average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Princeton (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -12 -9.5 -2.4 3.9 9.9 15.1 17.4 16.1 11.7 5.3 -1.1 -8.2
Max °C -2.1 0.7 8 16.2 22.6 28 29.6 28.5 24.7 18.1 9.1 0.8
Min °F 10.5 14.9 27.7 38.9 49.7 59.1 63.3 61 53.1 41.5 30.1 17.2
Max °F 19.4 24.1 37 50 61.2 70.7 74.3 72.1 64.8 53.1 39.2 25.3

Sea temperature

The graph below shows the average sea temperature.

Princeton average sea temperature chart (Celsius) Princeton average sea temperature chart (Fahrenheit)
Average sea temperature around Princeton in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 7 6.5 6.6 7.6 9.4 12.4 16.7 20.5 18.8 14.1 10.6 8.3
°F 44.5 43.6 43.9 45.6 48.9 54.3 62.1 68.9 65.9 57.4 51.1 47

Wind speed

The graph below shows the average wind speed.

Princeton average winspeed by month (km/h) Princeton average winspeed by month (mph)
Average wind speed in Princeton (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 19 19 21 21 18 16 14 13 14 17 18 18
mph 12 12 13 13 11 10 9 8 9 10 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.

Princeton relative humidity averages
Average relative humidity in Princeton
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
74% 73% 70% 65% 65% 66% 71% 74% 73% 70% 74% 77%

Other monthly averages

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Princeton weather stats

Princeton weather statistics
Hottest month: July 29.3°C 84.7°F
Driest month: February 31mm 1.2ins
Sunniest month: July 10.7hrs
Coldest month: January -2.3°C 27.9°F
Wettest month: June 104mm 4.1ins
Warmest sea: August 20.5°C 68.9°F
Map showing location of Princeton (41.36809, -89.46481) Princeton map pin © Google

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