Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™

St. Marys, Ontario

66°F
Location Chevron down
Location News Videos
Use Current Location
Recent

St. Marys

Ontario

66°
No results found.
Try searching for a city, zip code or point of interest.
Get Premium+
Create Your Account Unlock extended daily and hourly forecasts — all with your free account.
Let's Go Chevron right
Have an account already? Log In
settings
Help
St. Marys, Ontario Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps
News

News & Features

Astronomy

Business

Climate

Health

Recreation

Sports

Travel
For Business

Warnings

Data Suite

Forensics

Advertising

Superior Accuracy™

Video

Winter Center
Today Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities
Monday, October 12

Day

10/12
68°Hi
RealFeel® 68°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
RealFeel Shade™ 67°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
Warmer with a blend of sun and clouds

Max UV Index4.0 (Moderate)

AccuLumen Brightness Index™5 (Medium)

WindSW 10 mph

Wind Gusts20 mph

Probability of Precipitation70%

Probability of Thunderstorms14%

Precipitation0.02 in

Rain Amount0.02 in

Total Hours of Precipitation0.5

Total Hours of Rain0.5

Cloud Cover67%

Morning

Afternoon

Night

10/12
62°Lo
RealFeel® 57°
Cool
RealFeel Guide
Cool
53° to 62°
Light jacket or sweater may be appropriate.
LEARN MORE
Mostly cloudy and warm; a couple of evening showers followed by periods of rain late

WindSSW 7 mph

Wind Gusts18 mph

Probability of Precipitation96%

Probability of Thunderstorms23%

Precipitation0.16 in

Rain Amount0.16 in

Total Hours of Precipitation2.5

Total Hours of Rain2.5

Cloud Cover82%

Evening

Overnight

Sun & Moon

11 hrs 12 mins
Rise 7:34 AM
Set 6:46 PM
Waxing Crescent
Rise 9:52 AM
Set 7:20 PM

Temperature History

10/12
High
Low
Forecast
68°
62°
Average
57°
41°
Last Year
68°
49°
Record
77°
1995
30°
1964

Further Ahead

Hourly

10-Day

Monthly

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Weather Forecasts

Coldest air of the season so far on the way for Northeast, snowflakes

2 hours ago

Hurricane

Isaias made hurricane history before unleashing 117-mph winds, tornado...

47 minutes ago

Hurricane

Hurricane Simon bringing destructive winds, flooding to Mexico

1 hour ago

Hurricane

Family evacuates right before Isaias tears top floor off condo

1 day ago

Hurricane

Hurricane Isaias winds fuel shed fire as crews protect Florida home

5 hours ago

 More Stories

Featured Stories

Winter Weather

Winter forecast 2026-2027: El Niño to reshape snow, cold across US

4 days ago

Weather News

Flooding washes away homes, bridges, damages power station in Nepal

5 hours ago

Recreation

Utah ultramarathon canceled after heavy rain leaves about 70 stranded

1 hour ago

Recreation

Text from lost hiker sparks overnight search in California redwood par...

1 hour ago

Weather News

Hilarious animal photos from this year’s Comedy Wildlife Awards

1 day ago
World North America Canada Ontario St. Marys

Weather Near St. Marys:

  • Brampton, Ontario
  • Mississauga Valley, Ontario
  • Toronto, Ontario
Company
Proven Superior Accuracy™ About AccuWeather Digital Advertising Careers Press Contact Us
Products & Services
For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect Personal Weather Stations
Apps & Downloads
iPhone App Android App See all Apps & Downloads
Subscription Services
AccuWeather Premium AccuWeather Professional
More
AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center
Company
Proven Superior Accuracy™ About AccuWeather Digital Advertising Careers Press Contact Us
Products & Services
For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect Personal Weather Stations
Apps & Downloads
iPhone App Android App See all Apps & Downloads
Subscription Services
AccuWeather Premium AccuWeather Professional
More
AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center
© 2026 AccuWeather, Inc. "AccuWeather" and sun design are registered trademarks of AccuWeather, Inc. All Rights Reserved.
Terms of Use | Privacy Policy | Cookie Policy | About Your Privacy Do Not Sell or Share My Personal Information | Data Sources

...

...

...