2019 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 2019 Old Farmer’s Almanac, available online and in stores.

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

Free 2-Month Weather Forecast

April 2019 Long Range Weather Forecast for Southern Ontario
DatesWeather Conditions
Apr 1-4Sunny, cool
Apr 5-11Rain, then sunny, mild
Apr 12-14Sunny, cool
Apr 15-19Rain, then sunny, cool
Apr 20-24Showers, warm
Apr 25-30Rainy periods, cool
Apriltemperature 6°C (1° below avg.)
precipitation 80mm (10mm below avg. east, 40mm above west)

May 2019 Long Range Weather Forecast for Southern Ontario
DatesWeather Conditions
May 1-4Rainy east, sunny west; cool
May 5-11Rainy periods, cool
May 12-14Sunny, cool
May 15-23A few showers; warm, then cool
May 24-28Sunny, cool
May 29-31Showers, warm
Maytemperature 10.5°C (2° below avg.)
precipitation 95mm (20mm 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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Aug 3-11

Weather forcast

the weather on May 24 long weekend

Hi John, I see you are pretty confident in your predictions reading through the comments. I was wondering if you can please tell me the weather for May 24 and 25 long weekends in Toronto area so I can plan my weekend accordingly? Thanks


Hi Oleksiy, these are my predictions for Victoria Day long weekend and the following weekend.
May 17: 26 C and sunny
May 18: 20 C and Rain
May 19: 17 C and a little Rain
May 20: 16 C with a very little rain
May 24: 19 C and a little Rain
May 25: 16 C and sunny
May 26: 21 C and sunny

I'm predicting a wet, cool long weekend unfortunately but the following weekend will be pretty nice.

outdoor wedding

I am getting married July 20 and it is being held outside, can you advise what kind of weather I could expect for that day.

July Forecast

This is a reply to Ellen. The July 20-21 weekend will most likely be very warm. A good chance it'll be 30 C. It is typically the warmest time of the year right around that time and the nights are very warm too. As for rain, id know better a month or two away but there's a good chance of a thunderstorm sometime that week. July will most likely be above normal as a whole.

Weather July 26/27, 2019 Weekend??

What is predicted for weather during this time? Any rain?

June 28/29/30 - prediction for outdoor wedding

We are holding an outdoor wedding in Bradford Ontario on the June 28-30 weekend. Any predictions on the weather for then? It seems it will be during a heat spell...

Late June Forecast

This is a reply to Brooke. The last few days of June will most likely be very warm. A good chance it'll be around 30 C. June is predicted to be below normal but it'll most likely start to get very warm the last few days and carry over into most of July. It'll most likely rain a bit over that weekend but most of the weekend will be sunny. I'd know better in a good month from now

outdoor tent celebration on august 28/29

planning an outdoor (tent) celebration on either august 28/ 29th
too cool? rainy?

Late August Forecast

This is a reply to Susie. There's probably a better chance of no rain on the 28th then the 29th because it's further away from the august 30th new moon. The labour day weekend will most likely see some rain so good chance it'll be dry a few days before the long weekend. The temperature is normally around 24 C around that time and even if it's a few degrees below it's still comfortable. By the way, late august is typically the calmest period of the year.