2019-2020 Long Range Weather Forecast for London, 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 2020 Old Farmer’s Almanac, available online and in stores.

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

Free 2-Month Weather Forecast

August 2019 Long Range Weather Forecast for Southern Ontario
DatesWeather Conditions
Aug 1-8Scattered showers, warm
Aug 9-12T-storms, cool
Aug 13-17Scattered t-storms, hot
Aug 18-26A few showers, cool
Aug 27-31Sunny, cool
Augusttemperature 19°C (1° below avg.)
precipitation 100mm (20mm above avg.)

September 2019 Long Range Weather Forecast for Southern Ontario
DatesWeather Conditions
Sep 1-3Showers, cool
Sep 4-6T-storms, warm
Sep 7-20A few showers, cool
Sep 21-28Rain, then sunny, cool
Sep 29-30Rain east, snow west
Septembertemperature 13°C (2° below avg.)
precipitation 110mm (20mm 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 London, ON

Reader Comments

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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!

Dry October

Hi Evan, I'd wait until September 30 as there will most likely be some rain over the 28-29 weekend and then a good chance it'll be dry for a little stretch after that.

October 19, 2019 Wedding

Any predictions for weather on Oct 19, 2019 in the Simcoe region area?

September 14th wedding

planning an outdoor wedding in Midland, ON on September 14th, 2019 in my mother's backyard, what does the forecast say?

Thank you

August 10th wedding

Hi!
What does the weather in Bradford, ON look like on August 10th for an outdoor wedding? Thank-you!

Weather for August 10 in Alliston, Ontario

Checking on prediction of weather for August 10 in Alliston, Ontario. Having a large outdoor 80th birthday party and praying for no rain.

October 5 wedding

I'm planning on having a backyard wedding October 5th, 2019 in Kitchener, Ontario. Weather forecast?

Fall Leaves

Looking to view the fall leaves in Huntsville either weekend of September 28 or weekend of October 19...which do you think is better? Will the fall colours be early or late this year?

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