2020 Long Range Weather Forecast for Southern Ontario

Get the Long Range Weather for Your Location

See long range weather forecasts for the next 60 days from The Old Farmer’s Almanac! Our long range forecasts can be used to make more informed decisions about future plans that depend on the weather, from vacations and weddings to sporting events and outdoor activities.

To see long term forecasts for the entire year, pick up a copy of The 2021 Old Farmer’s Almanac, available online and in stores.

Note: Long range forecasts are regional, not city-specific.

Free 2-Month Weather Forecast

September 2020 Long Range Weather Forecast for Southern Ontario
DatesWeather Conditions
Sep 1-4Showers, cool
Sep 5-8T-storms, then sunny, cool
Sep 9-15Rainy periods, cool
Sep 16-25A few showers, cool
Sep 26-30Sunny, turning warm
Septembertemperature 14°C (1°C below avg.)
precipitation 60mm (30mm below avg.)

October 2020 Long Range Weather Forecast for Southern Ontario
DatesWeather Conditions
Oct 1-9Showers, mild
Oct 10-14Showers east, sunny west; cool
Oct 15-19Rainy, mild
Oct 20-25Showers east; sunny, mild west
Oct 26-31Showers, mild
Octobertemperature 12°C (2°C above avg.)
precipitation 85mm (10mm above avg.)

Annual Weather Summary
November 2019 to October 2020

Winter temperatures, precipitation, and snowfall will be above normal. The coldest periods will be in mid- to late November, January, early and mid- to late February, and early March. The snowiest periods will be in early and mid-December, mid- to late January, mid-February, and early March. April and May will be warmer than normal, with precipitation above normal in the east and below normal in the west. Summer will be hotter than normal, with the hottest periods in late June and early to mid- and mid- to late July. Precipitation will be above normal in the east and below in the west. September and October will be slightly warmer and drier than normal.

Map showing Old Farmer's Almanac long range weather region number 3

About the Southern Ontario Region

The Southern Ontario long range weather region includes all or part of the following provinces: ONTARIO (Alliston, Amherstburg, Barrie, Bolton, Bradford, Brantford, Chatham, Cobourg, Collingwood, Elliot Lake, Fergus, Fort Erie, Georgetown, Guelph, Haileybury, Hamilton, Ingersoll, Kenora, Kitchener, Leamington, Lindsay, London, Midland, Milton, North Bay, Orangeville, Orillia, Oshawa, Owen Sound, Paris, Peterborough, Port Hope, Sarnia, Simcoe, Stouffville, Stratford, Strathroy, Sudbury, Thunder Bay, Tillsonburg, Timmins, Toronto, Uxbridge, Wallaceburg, Windsor, Woodstock).

Southern Ontario Neighboring Regions

Here are the regions that neighbor the Southern Ontario long range weather region:

Temperature and Precipitation November 2019 to October 2020

Temperature and Precipitation Chart, November 2019 to October 2020 for Southern Ontario Region

Reader Comments

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Oct 12 2019 Wedding

Getting married Thanksgiving weekend in Milton, ON. Hoping for an outdoor ceremony! What's our chances?

Congratulations!

The Editors's picture

Hi, Kimberly: Your chances for a happy marriage are 100%, take it from us! And your chances for an outdoor ceremony are great, too, although we would suggest considering seat warmers, as it might be cooler, even with a few of those F-words (uh, flurries). That’s the bad news. The great news is that this is right before a beautiful sunny spell, so if our forecast slides back in time just a little, you are into the clear in all senses of the word. Either way, it will be a wedding to remember, we’re sure!

Pig & Corn Roast

I’m having a Pig & Corn Roast with live entertainment in Rodney, Ontario on August 10th. Can you please let me know if I need tents or are we looking for a fabulous day and evening ☀️
Thank you!

Tents Subject

The Editors's picture

Hi, Margie: You are looking at a fabulous day and evening for sure! But maybe with a tent or two, as we are looking at some T-storms and maybe it not being really super hot. Plus heavy drool. Plus blizzards of napkins. Have fun and thanks for asking!

Really worried for June 27th outdoor wedding!!!

Looks like my wedding day is the one day their might be thunderstorms... any more accurate predictions than weather network and accuweather?? It's in Windsor, ON!

June 27

Hi Nella, June 27th is predicted to be a rain free day. It should be a nice day weather wise for a wedding but I don't control the weather lol, but there's a bigger chance of no rain then rain so that should be good news for you.. hopefully.

Weather forcast for September 14th 2019

Planning a Milestone party for my Spouse
Out doors in port mcnicoll midland Ontario.

July 20th outdoor wedding

Hi, Any idea the weather forecast for July 20th? My daughter is getting married outdoors in Astorville, On. We are hoping for a beautiful day :) thank you!

movie shoot

Planning a feature film shoot that starts either the last week of Sept or first week of Oct in North Bay. Was hoping for a few days of warmer, sunny weather - there are several scenes with a convertible (mainly stationary). How big a difference do you think it would make to start on the 26th vs the 30th of Sept?

Thanks!

Movie shoot

The weather should be fantastic only if you have me as an extra in it!

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