2018 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. If your city is located inside a region, the region's forecast will apply to you.

Free 2-Month Weather Forecast

July 2018 Long Range Weather Forecast for Southern Ontario
DatesWeather Conditions
Jul 1-3Sunny, hot
Jul 4-13Scattered t-storms, warm
Jul 14-17Sunny, warm
Jul 18-26A few t-storms, cool
Jul 27-31Sunny, warm
Julytemperature 20.5°C (avg.)
precipitation 100mm (avg. east, 40mm above west)

August 2018 Long Range Weather Forecast for Southern Ontario
DatesWeather Conditions
Aug 1-5Scattered showers, warm
Aug 6-10Sunny, warm
Aug 11-18T-storms, then sunny, cool
Aug 19-28Scattered t-storms, hot
Aug 29-31Sunny, warm
Augusttemperature 22.5°C (3° above avg.)
precipitation 95mm (50mm below avg. east, 70mm above west)

Annual Weather Summary: November 2017 to October 2018

Winter temperatures will be above normal, with the coldest periods in mid-November, early and late December, early January, and early and mid-February. Precipitation and snowfall will be above normal in the east and below normal in the west, with the snowiest periods in late November, mid- and late December, and early to mid-March. April and May will be a bit cooler than normal, with near-normal precipitation. Summer will be hotter than normal, with rainfall below normal in Southwest Ontario and above normal elsewhere. The hottest periods will be in early and late June, early July, and mid- to late August. September and October will be warmer and slightly 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 2017 to October 2018

Temperature and Precipitation Graph

Reader Comments

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Weather opinions

Travel the world a little folks. Water is like gold in some parts with that goes food. Stop your bitching. Do like in the old days..." dip your finger in the well, shove it out the door see from which direction the wind is coming from" even sailors do this one. Think as to which direction warm,cold, wet or dry comes from per season and then dress up or dress down accordingly.

Really ? How very nice.

First time on this site and I thought I would read the comments . Wow . I can't believe how insulting people are to other people.

Truth be told , no one , yes I said no one , can predict the weather . It is the only job out there where the predictions can be wrong 98 % of the time and those predicting it still keep their jobs. In any other profession ,if that many mistakes were made, they would be fired long ago.

The best solution is to step out your door. If it is windy and cool put on a jacket , if it is stinky hot and humid , shorts and tee shirt works, if it snowing , sleeting , freezing rain .....dress accordingly and drive accordingly.

Oh, and stay away from nasty people . They deserve to spend their time with themselves. .

Weather is weather

Let's see simmer is hot winter is cold lol
Enough said

It's just weather

Why are people arguing in a weather forum? I wouldn't live anywhere else! Enjoying all 4 seasons, and the unpredictability of our weather makes me appreciate every day.


very lucky live this part the world we have to drink .we very blessed in this part the world


Could the almanac be more specific.....I would like to know about the weather for the Timmins area this coming summer and not lump us in with Sudbury which is 5 hrs away and weather forecasts could be totally different!


So far in my area all predictions have been 100% accurate. To everyone else, get over it, if you dont like your weather, move somwhere that will help you whine, complain and b*tch less. Have a great summer, happy planting everybody

Hot weather

On May 1-2, the temperature was 28 degrees Celsius in Etobicoke. Maybe May will be ABOVE average. They said May 1 mild. 28 degrees isn’t mild. It’s hot. At least it’s better to not have to wear winter coats.

Be Postive

Enjoy any weather we get . Can't control it ,hot ,cold, warm make the best of it . Remember Wynne says the carbon tax we pay help climate control. No that's smog at its best.Enjoy the weather .no tax can help it.lol


Dave, have you already forgotten all the real smog advisories of a few years ago? That's why we closed the coal fired plants. I hate higher gas prices as much as the next guy but the best way to move past dangerous fossil fuels is to make them more expensive than alternatives.
Enjoy the summer whatever may come!