2019 Long Range Weather Forecast for Southern Ontario


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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 annual Old Farmer’s Almanac, available online and in stores.

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

Free 2-Month Weather Forecast

September 2018 Long Range Weather Forecast for Southern Ontario
DatesWeather Conditions
Sep 1-7Sunny, turning cool
Sep 8-15Scattered t-storms, cool
Sep 16-20A couple t-storms, cool
Sep 21-30Scattered showers east, sunny west; warm
Septembertemperature 14.5°C (avg.)
precipitation 70mm (20mm below avg.)

October 2018 Long Range Weather Forecast for Southern Ontario
DatesWeather Conditions
Oct 1-3Sunny, warm
Oct 4-10T-storms, then sunny, cool
Oct 11-14Showers, cool
Oct 15-20Sunny, mild
Oct 21-26Showers, mild
Oct 27-31Sunny, cold
Octobertemperature 11°C (2° above avg.)
precipitation 75mm (10mm above avg.)

Annual Weather Summary: November 2018 to October 2019

Winter temperatures will be close to normal, on average, with above-normal precipitation and snowfall. The coldest periods will be in mid- and late December, early and late January, and early February. The snowiest periods will be in early December, mid-February, and early to mid-March. April and May will be cooler than normal, with above-normal precipitation. Summer will be cooler and rainier than normal. The hottest periods will be from late June into early July and in early to mid-July and mid-August. September and October will be cooler and rainier 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 2018 to October 2019

Temperature and Precipitation Chart, November 2018 to October 2019 for Southern Ontario Region

Reader Comments

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You obviously don’t spend time outdoors

Spending time out in the hot sun will always be better than a cool summer .. Whether you’re at the beach or out in your backyard, nothing beats a summer’s day in the sun. I’d sacrifice a bit of cash for the AC to have warm summers any day.

I hear ya sista!!! I can't

I hear ya sista!!! I can't stand the hot, humid weather.

Hot weather

We lived 50 years ago with no Ac in the summer and had wood stoves too heat the homes. Suck it up butter cups .. I want summers at 35 and winters at -35. We are Canadians.


We are ineed, Canadians! Heat and extreme cold! Enjoy it all!



Be calm. Don’t use so many !

Be calm. Don’t use so many !’s. It’s annoying me. I understand that you don’t like when people complain about weather. But it’s the internet, so get over it.


You lied to me. So said that March will be above average but it was below average. March wasn't as warm as February. You should be ashamed of yourself. I thought it was gonna be 20 degrees celsius in March. It was only single digit highs that time.

March Weather

It was spot on. As chilly as it was it was still above average. The March weather is usually a crap shoot, but this year's prediction was good enough for the girls I go out with.

lol. I feel you. I want it to

lol. I feel you. I want it to be warmer too. I can't stand the depressing cold weather especially since it is already April. Not all weather forecast predictions are accurate so you can't blame the people who own this website. Hold on, it should be getting warmer soon. The cold can't stay with us forever. ;)