2021 Long Range Weather Forecast for Trenton, 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

January 2021 Long Range Weather Forecast for Southern Ontario
DatesWeather Conditions
Jan 1-5Flurries, cold
Jan 6-12Snow, then flurries; cold
Jan 13-19Snow showers, cold
Jan 20-25Flurries, cold
Jan 26-31Lake snows, cold
Januarytemperature -10°C (3°C below avg.)
precipitation 75mm (15mm above avg.)

February 2021 Long Range Weather Forecast for Southern Ontario
DatesWeather Conditions
Feb 1-7A few showers, quite mild
Feb 8-15Periods of rain and snow east, snow west; mild
Feb 16-20Sunny, mild
Feb 21-28Rain and snow showers east, flurries west; turning cold
Februarytemperature -2°C (3°C above avg.)
precipitation 85mm (25mm above avg.)

Annual Weather Summary
November 2020 to October 2021

Winter temperatures will be slightly below normal in the east and slightly above normal in the west, with the coldest periods in early to mid-December, from late December into early January, and in mid- and late January. Precipitation and snowfall will be much above normal, with the snowiest periods in mid-December, early to mid-January, and early to mid-March. April and May will be cooler and rainier than normal in the east and warmer and drier in the west. Summer will be slightly cooler and rainier than normal in the east and hotter with near-normal rainfall in the west. The hottest periods will be in early June and mid-August. September and October will be cooler than normal, with near-normal precipitation.

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 2020 to October 2021

Temperature and Precipitation Chart, November 2020 to October 2021 for Trenton, ON

Reader Comments

Leave a Comment

November

Pfft, mild in the west, they got hit with snow today (Oct 23, 2020)

Reply to comment made by Peter Daniel July 18. 2020 -

Peter commented July 18 - LOOKING for EASTERN ONTARIO Belleville Kingston Ottawa- I check both the South Western Quebec (west references) and Southern Ontario (eastern references) and try to mesh the forecasts. Reasonably successful but more time consuming. I am 150 km NE of Belleville during summer. Hope Peter gets this reply.

Looking for East of Ontario

Trenton / Belleville / Kingston and on to Ottawa.

Region Missing

Does anyone know how to view the forecast for the Lake Superior region of Ontario? When I type in names of towns along the north shore of Superior I get directed to this Southern Ontario page for some reason. I can't seem to find the Northern Ontario regional forecast page.

Southern Ontario Weather Forecast

It does not seem that the May weather is happening as forecast. We live in Barrie and it has been ..thus far..much cooler than predicted. Would be nice to be able to plan outdoor activities and be reasonably confident that if the forecast is shown as warm and dry .. that it will be.

Huh?

It says in the farmer's almanac will be above average for May. In Toronto, it says it's going to be a high of 4 degrees tomorrow (May 8). Isn't it EVER gonna warm up or is this as warm as it's ever gonna get? Does it have anything to do with the coronavirus? Needless to say, 4 degrees and a few other single digit high days in a row does not sound like above normal. I am also concerned if it will be 30 degrees this month. May 11-21 says that it will be turning hot. Maybe they mean hot like 24 or 25 degrees, I mean, I don't consider that hot.

Wow 3 degrees above normal

Wow 3 degrees above normal for May. The weather network says cooler than normal. I think summer will be cooler not hotter. Also, you did great with your winter forecast which was mild.

May weather

May won't be above normal, at least the first week of May will be cooler than normal.

Southern Ontario Weather

What happened to Kingston?

weather

So far spring has not sprung.......too much snow left!

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