CanadaCountries Canada Ontario September Temperatures
CanadaCanada Ontario
Ontario Canada
Temperatures in September
ClimateForecastSeptemberOctober >>

Ontario temperatures in September

Ontario is a region in Canada. September in has maximum daytime temperatures ranging from moderate in Niagara on the Lake with 17°C to high temperatures in Chatham with 24°C. Nighttime temperatures generally drop to 14°C in Chatham and 9°C in Niagara on the Lake. September is a summer month.

What is the temperature of the different cities in Ontario in September?

Explore the map below to discover average September temperatures at the top destinations in Ontario. For a deeper dive, simply click on any destination dot.

Weather conditions Weather
Temperatures
Precipitation
Map not visible? Whoops sorry! Please refresh the page.
Legend very warm warm pleasant moderate cold very cold
Very warm means maximum temperatures above 30°C. Warm: 22°C to 30°C. Pleasant: 18°C to 22°C Moderate: 12°C to 18°C. Cold: 2°C to 12°C. Very cold: lower than 2°C

  • What is the warmest city in September in Ontario?
    • Chatham tops the warmest city list in our database with average maximum daytime temperatures around 24°C and a minimum nighttime temperature of around 14°C.

  • What is the coldest city in September in Ontario?
    • When looking through our records, we find that Niagara on the Lake stands out as the coolest city in Ontario for the month of September. Daytime highs average 17°C and it cools down to about 9°C at night.

  • How much sun does Ontario get in September?
    • Toronto enjoys close to 195 hours of sunlight. This not only brightens the days but also uplifts the atmosphere during the month.

    Interested in more climate information?

    We have much more information about the climate in Ontario. Interested in the weather conditions in a specific month? Select the month below.

  • January      
  • February      
  • March      
  • April      
  • May      
  • June      
  • July      
  • August      
  • September      
  • October      
  • November      
  • December      

    • Weather and climate has detailed information for every country in the world. Are you going to Canada? Get detailed historical weather averages for many cities in Canada.

    Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.