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

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.)

October 2019 Long Range Weather Forecast for Southern Ontario
DatesWeather Conditions
Oct 1-7Showers, cool
Oct 8-12Rain, then flurries, cold
Oct 13-21Sunny, turning mild
Oct 22-25Showers, mild
Oct 26-31Showers, cool
Octobertemperature 10°C (avg.)
precipitation 75mm (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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Outdoor Wedding

Any changes in your forcast for July 20?

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

Late June Forecast Cont'd

Any prediction for the weekend of June 22nd?

Hi John - any update on the

Hi John - any update on the weather for June 29 in Bradford?

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.

Something has to be done about global warming

I lived in Toronto all my life, and the winters in my childhood were a lot snowier and a lot colder than they are now. I mean the difference is very huge now compared to many years ago, so I am hoping a return to our old fashioned normal winters where normal lows ranged for -19c to - 31c before the windchill.

September weather

We have an outdoor wedding planned in Parry Sound, Ontario September 7. Any predictions for then??