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

Mount St. Louis, Ontario

40°F
Location Chevron down
Location News Videos
Use Current Location
Recent

Mount St. Louis

Ontario

40°
No results found.
Try searching for a city, zip code or point of interest.
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
Mount St. Louis, 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

View hourly forecasts 10-days ahead

Activate Your Premium+ Subscription

Chevron right

5 PM

39°
RealFeel® 32°
Cold
RealFeel Guide
Cold
25° to 39°
Coats and hats are appropriate, consider gloves and a scarf.
LEARN MORE
rain drop 0%
Chevron down
Mostly sunny

RealFeel Shade™29°

WindSSE 13 mph

Air QualityFair

Max UV Index2.2 (Low)

Wind Gusts22 mph

Humidity43%

Indoor Humidity29% (Very Dry)

Dew Point18° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover29%

Visibility10 mi

Cloud Ceiling33400 ft

6 PM

38°
RealFeel® 28°
Cold
RealFeel Guide
Cold
25° to 39°
Coats and hats are appropriate, consider gloves and a scarf.
LEARN MORE
rain drop 0%
Chevron down
Partly sunny

RealFeel Shade™27°

WindSSE 14 mph

Air QualityFair

Max UV Index1.3 (Low)

Wind Gusts28 mph

Humidity48%

Indoor Humidity30% (Dry)

Dew Point20° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover39%

Visibility10 mi

Cloud Ceiling30000 ft

7 PM

37°
RealFeel® 26°
Cold
RealFeel Guide
Cold
25° to 39°
Coats and hats are appropriate, consider gloves and a scarf.
LEARN MORE
rain drop 0%
Chevron down
Intermittent clouds

RealFeel Shade™26°

WindSSE 14 mph

Air QualityFair

Max UV Index0.2 (Low)

Wind Gusts27 mph

Humidity53%

Indoor Humidity31% (Dry)

Dew Point21° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover67%

Visibility10 mi

Cloud Ceiling10100 ft

8 PM

35°
RealFeel® 26°
Cold
RealFeel Guide
Cold
25° to 39°
Coats and hats are appropriate, consider gloves and a scarf.
LEARN MORE
rain drop 0%
Chevron down
Intermittent clouds

WindSE 10 mph

Air QualityFair

Wind Gusts24 mph

Humidity60%

Indoor Humidity33% (Dry)

Dew Point23° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover70%

Visibility10 mi

Cloud Ceiling10100 ft

9 PM

33°
RealFeel® 24°
Very Cold
RealFeel Guide
Very Cold
10° to 24°
Caution advised. Older adults, infants, and those with sensitive medical conditions, should be well dressed to protect from hypothermia and frostbite. Coat, hat, gloves and a scarf are appropriate.
LEARN MORE
rain drop 0%
Chevron down
Intermittent clouds

WindSE 9 mph

Air QualityFair

Wind Gusts24 mph

Humidity67%

Indoor Humidity33% (Dry)

Dew Point23° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover65%

Visibility10 mi

Cloud Ceiling18600 ft

10 PM

33°
RealFeel® 25°
Cold
RealFeel Guide
Cold
25° to 39°
Coats and hats are appropriate, consider gloves and a scarf.
LEARN MORE
rain drop 0%
Chevron down
Partly cloudy

WindSSE 9 mph

Air QualityFair

Wind Gusts23 mph

Humidity68%

Indoor Humidity33% (Dry)

Dew Point23° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover46%

Visibility10 mi

Cloud Ceiling30000 ft

11 PM

32°
RealFeel® 24°
Very Cold
RealFeel Guide
Very Cold
10° to 24°
Caution advised. Older adults, infants, and those with sensitive medical conditions, should be well dressed to protect from hypothermia and frostbite. Coat, hat, gloves and a scarf are appropriate.
LEARN MORE
rain drop 0%
Chevron down
Partly cloudy

WindSSE 9 mph

Air QualityFair

Wind Gusts23 mph

Humidity70%

Indoor Humidity33% (Dry)

Dew Point23° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover46%

Visibility10 mi

Cloud Ceiling30000 ft

Hourly Weather Forecast for Mount St. Louis

AccuWeather's hourly forecast for Mount St. Louis provides hour-by-hour temperatures, RealFeel® Temperature, and precipitation probability through the next 10 days. The current hour shows 39° with a RealFeel® of 32°, mostly sunny with a 0% chance of precipitation. Each hourly forecast includes wind speed, humidity, air quality, UV index, and the AccuLumen Brightness Index™, AccuWeather's measure of perceived outdoor light intensity. Forecasts are generated by proprietary systems developed by AccuWeather meteorologists since 1962.

Further Ahead

Tomorrow

Friday

10-Day

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Climate

The US just experienced its hottest March on record

50 minutes ago

Severe Weather

Severe storms to threaten central US daily; building risk in mid-April

1 hour ago
Live Blog

Artemis II: Astronauts begin journey back to Earth after lunar flyby

LATEST ENTRY

How to wake up like an astronaut with music from Artemis II

5 hours ago

Weather Forecasts

Southeast warmth to build as Northeast has more temperature turmoil

2 hours ago

Weather Forecasts

Late-week storm to bring rain, mountain snow to California, Southwest

2 hours ago

 More Stories

Featured Stories

Sports

Tropicana Field reopens after Hurricane Milton as Rays secure home win

1 day ago

Sports

Masters at Augusta National: Driest forecast since 2011

9 hours ago

Recreation

Hikers rescued after believing a mountain lion stalked their campsite

6 hours ago

Weather News

Father dies saving children in Florida rip current as rescues surge st...

1 day ago

Astronomy

The upsidedown moon: Why the moon looks odd on the other side of the w...

2 hours ago
World North America Canada Ontario Mount St. Louis

Weather Near Mount St. Louis:

  • 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

...

...

...