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

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JULY 20 OUTDOOR BACKYARD ENGAGAMENT

Hi!

My daughter is having her outdoor engagement in Kitchener on July 20. What is the weather looking like for that Saturday?

Thanks !

Saturday July 20th 2019.

sunny and warm!

Forecast shows differently

Hi, the forecast is showing it is likely to thunderstorm. What are your thoughts on that?

JULY 18-20 VIDEO SHOOT

I'm planning an outdoor video shoot on July 18 and 19 with a weather day on July 20. What will the weather look like around those days?

JULY 18-20 VIDEO SHOOT

I forgot to add that the shoot will be in Ancaster from July 18-20. Thank you!

Aw, Shoot!

The Editors's picture

Hi, Cait: Looks like sunny and warm to us, but showers coming in on the 21st… have fun and thanks for asking!

August 10 wedding

Having an outdoor wedding August 10 in Bowmanville/Newcastle area. What will the weather be like?

Aug 24 Wedding

Hello :) ... curious to know what kind of weather I might hope to expect on my big day this year. The ceremony will be outdoors in Ajax.

The Weather

Can you tell me what the weather will be on the Labour Day long weekend in Windsor, ON, specifically on August 31 and September 1?

September 7 Outdoor Festival

Looking to throw an outdoor neighbourhood festival on Saturday, September 7. Are we looking at a sunny day, or rainy and cool? Thx!

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