Ontario (CA) monthly weather averages

Contents

Average daytime temperature

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

Ontario average temperature chart (Celsius) Ontario average temperature chart (Fahrenheit)
Average monthly temperatures in Ontario (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 18.2 19.6 19.8 22.2 24.9 28.6 33.1 33.2 30.6 26.8 21.6 18.3
°F 64.8 67.3 67.6 72 76.8 83.5 91.6 91.8 87 80.2 70.9 64.9

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.

Ontario monthly rainfall chart (mm) Ontario monthly rainfall chart (inches)
Average monthly rainfall in Ontario (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 84 80 71 30 10 1 1 4 9 9 45 58
inches 3.3 3.1 2.8 1.2 0.4 0.1 0 0.2 0.4 0.4 1.8 2.3
Rainy days 5 5 5 3 1 0 0 1 2 2 4 4

Average annual rainfall in Ontario: 317mm (124.8 inches)

Average daily sunshine

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

Ontario average daily sunshine chart
Average daily sunshine Ontario
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 7.7 8.5 9 10.5 10.1 10.9 12.2 11.7 10.2 9.1 7.9 7.7

Day / night temperatures

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

Ontario average minimum / maximum temperatures (Celsius) Ontario average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Ontario (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 4.1 5.3 6.1 7.6 10.8 13.4 16.3 16.8 14.5 11.1 6.9 4
Max °C 18.6 20 20.1 22.6 25.3 29 33.5 33.7 31 27.2 22 18.6
Min °F 39.3 41.5 43 45.7 51.4 56.1 61.3 62.2 58 51.9 44.3 39.2
Max °F 52.3 54.7 55.6 59.2 64.4 70.2 76.8 77.4 72.9 66.4 57.9 52.3

Sea temperature

The graph below shows the average sea temperature.

Ontario average sea temperature chart (Celsius) Ontario average sea temperature chart (Fahrenheit)
Average sea temperature around Ontario in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 14.6 14.5 14.7 15 15.8 17.2 18.9 19.7 19.6 18.6 17 15.3
°F 58.2 58.1 58.4 58.9 60.5 62.9 66 67.5 67.3 65.6 62.6 59.6

Wind speed

The graph below shows the average wind speed.

Ontario average winspeed by month (km/h) Ontario average winspeed by month (mph)
Average wind speed in Ontario (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 11 12 14 15 14 14 14 13 13 12 11 11
mph 7 8 9 9 9 9 9 8 8 7 7 7

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.

Ontario relative humidity averages
Average relative humidity in Ontario
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
62% 62% 61% 58% 59% 60% 60% 62% 62% 61% 62% 63%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Ontario weather stats

Ontario weather statistics
Hottest month: August 33.2°C 91.8°F
Driest month: July 1mm 0ins
Sunniest month: August 11.7hrs
Coldest month: January 18.2°C 64.8°F
Wettest month: January 84mm 3.3ins
Warmest sea: August 19.7°C 67.5°F
Map showing location of Ontario (34.06334, -117.65089) Ontario map pin © Google

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