2020 Long Range Weather Forecast for Hamilton, ON

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 Hamilton, ON

Reader Comments

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I was just looking for

I was just looking for previous predictions about this past summer because it was one of the nicest in recent memory. I read that they were predicting a cool and wet summer for 2019 and got bummed out. But now I can see that it's potentially fake news.


Personally I wouldn’t give up the seasons in Canada for any other place in the world. Living here is like spinning a roulette wheel, you never know what you are going to get and each day is a surprise. Weather is unpredictable, after all Mother Nature takes care of it and she will deal out whatever her mood dictates. So sit back fellow Canadians and find some positive in the weather, being so negative must be exhausting. If you don’t trust what the Almanac predicts why are you following it?

2 thumbs up

2 thumbs up

Weather in Canada

I totally agree with you, the weather is so different each day.

Will this summer be a repeat of 1992?

I was just wondering if this summer will be a repeat of 1992 because I heard that 2019 will be a grand solar minimum. Solar minimums cool the entire globe.


are people really fighting in the comments of the the old farmer's almanac website? for real, y'all? relax.


Why?? are you stating the weather for S.Ontario the same for N.Ontario???...Our weather is completely different then that of S.Ont,..

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.


Why are we lumped in with Souther Ontario when we live in Northern Ontario.....not the same at all!

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. .