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

Cornwall, Ontario

19°F
Location Chevron down
Location News Videos
Use Current Location
Recent

Cornwall

Ontario

19°
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
Cornwall, Ontario Weather
Today WinterCast Local {stormName} Tracker Hourly Daily 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 WinterCast

Hourly

Daily Radar MinuteCast® Monthly Air Quality Health & Activities

View hourly forecasts 10-days ahead

Activate Your Premium+ Subscription

Chevron right

WinterCast

2 - 4 in

Wed, 2/25, 3:00 AM - Thu, 2/26, 7:00 AM

Snow

7 AM

17°
RealFeel® 1°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 40%
Chevron down
Flurries

RealFeel Shade™1°

WindWSW 13 mph

Air QualityFair

Max UV Index0.1 (Low)

Wind Gusts15 mph

Humidity71%

Indoor Humidity23% (Very Dry)

Dew Point9° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover99%

Snowtrace

Visibility10 mi

Cloud Ceiling8800 ft

8 AM

16°
RealFeel® -1°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 40%
Chevron down
Flurries

RealFeel Shade™-1°

WindWSW 14 mph

Air QualityFair

Max UV Index0.3 (Low)

Wind Gusts16 mph

Humidity73%

Indoor Humidity23% (Very Dry)

Dew Point8° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover100%

Snowtrace

Visibility10 mi

Cloud Ceiling4400 ft

9 AM

17°
RealFeel® 2°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 37%
Chevron down
Intermittent clouds

RealFeel Shade™2°

WindW 14 mph

Air QualityFair

Max UV Index0.9 (Low)

Wind Gusts16 mph

Humidity68%

Indoor Humidity22% (Very Dry)

Dew Point8° F

AccuLumen Brightness Index™6 (Medium)

Cloud Cover70%

Visibility10 mi

Cloud Ceiling4000 ft

10 AM

18°
RealFeel® 4°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 32%
Chevron down
Intermittent clouds

RealFeel Shade™2°

WindW 14 mph

Air QualityFair

Max UV Index1.1 (Low)

Wind Gusts17 mph

Humidity61%

Indoor Humidity21% (Very Dry)

Dew Point7° F

AccuLumen Brightness Index™6 (Medium)

Cloud Cover70%

Visibility10 mi

Cloud Ceiling3700 ft

11 AM

20°
RealFeel® 6°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 32%
Chevron down
Intermittent clouds

RealFeel Shade™3°

WindW 15 mph

Air QualityFair

Max UV Index1.4 (Low)

Wind Gusts20 mph

Humidity56%

Indoor Humidity21% (Very Dry)

Dew Point7° F

AccuLumen Brightness Index™6 (Medium)

Cloud Cover70%

Visibility10 mi

Cloud Ceiling3300 ft

12 PM

22°
RealFeel® 7°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 32%
Chevron down
Intermittent clouds

RealFeel Shade™5°

WindW 15 mph

Air QualityFair

Max UV Index1.4 (Low)

Wind Gusts22 mph

Humidity53%

Indoor Humidity22% (Very Dry)

Dew Point7° F

AccuLumen Brightness Index™6 (Medium)

Cloud Cover70%

Visibility10 mi

Cloud Ceiling2900 ft

1 PM

23°
RealFeel® 10°
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 32%
Chevron down
Cloudy

RealFeel Shade™10°

WindWSW 13 mph

Air QualityFair

Max UV Index0.8 (Low)

Wind Gusts22 mph

Humidity52%

Indoor Humidity22% (Very Dry)

Dew Point8° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover97%

Visibility10 mi

Cloud Ceiling2500 ft

2 PM

24°
RealFeel® 12°
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 32%
Chevron down
Cloudy

RealFeel Shade™12°

WindWSW 13 mph

Air QualityFair

Max UV Index0.7 (Low)

Wind Gusts21 mph

Humidity50%

Indoor Humidity22% (Very Dry)

Dew Point8° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover95%

Visibility10 mi

Cloud Ceiling2900 ft

3 PM

26°
RealFeel® 15°
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 32%
Chevron down
Cloudy

RealFeel Shade™15°

WindW 12 mph

Air QualityFair

Max UV Index0.5 (Low)

Wind Gusts20 mph

Humidity47%

Indoor Humidity23% (Very Dry)

Dew Point8° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover95%

Visibility10 mi

Cloud Ceiling3300 ft

4 PM

25°
RealFeel® 14°
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 32%
Chevron down
Cloudy

RealFeel Shade™14°

WindW 10 mph

Air QualityFair

Max UV Index0.3 (Low)

Wind Gusts17 mph

Humidity50%

Indoor Humidity23% (Very Dry)

Dew Point9° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover95%

Visibility10 mi

Cloud Ceiling3700 ft

5 PM

23°
RealFeel® 14°
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 32%
Chevron down
Cloudy

RealFeel Shade™14°

WindW 8 mph

Air QualityFair

Max UV Index0.1 (Low)

Wind Gusts13 mph

Humidity53%

Indoor Humidity22% (Very Dry)

Dew Point8° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover95%

Visibility10 mi

Cloud Ceiling4800 ft

6 PM

21°
RealFeel® 17°
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 26%
Chevron down
Cloudy

WindWSW 6 mph

Air QualityFair

Wind Gusts7 mph

Humidity55%

Indoor Humidity22% (Very Dry)

Dew Point7° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover95%

Visibility10 mi

Cloud Ceiling5900 ft

7 PM

19°
RealFeel® 19°
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 15%
Chevron down
Partly cloudy

WindWSW 4 mph

Air QualityFair

Wind Gusts5 mph

Humidity59%

Indoor Humidity21% (Very Dry)

Dew Point6° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

8 PM

16°
RealFeel® 16°
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 15%
Chevron down
Partly cloudy

WindSSW 4 mph

Air QualityFair

Wind Gusts5 mph

Humidity65%

Indoor Humidity20% (Very Dry)

Dew Point6° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

9 PM

13°
RealFeel® 12°
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 15%
Chevron down
Partly cloudy

WindS 5 mph

Air QualityFair

Wind Gusts6 mph

Humidity72%

Indoor Humidity20% (Very Dry)

Dew Point6° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

10 PM

11°
RealFeel® 9°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 15%
Chevron down
Partly cloudy

WindS 5 mph

Air QualityFair

Wind Gusts6 mph

Humidity78%

Indoor Humidity20% (Very Dry)

Dew Point6° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

11 PM

11°
RealFeel® 9°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 15%
Chevron down
Partly cloudy

WindS 5 mph

Air QualityFair

Wind Gusts6 mph

Humidity78%

Indoor Humidity20% (Very Dry)

Dew Point6° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

Further Ahead

Tomorrow

Saturday

Daily

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Winter Weather

Arctic surge to fuel early-week winter storm for Midwest, Northeast

1 hour ago

Hurricane

Hurricane Melissa upgraded in report to 190 mph winds

14 hours ago

Severe Weather

Tornado season: What forecasters expect for severe weather in 2026

17 hours ago

Winter Weather

Blizzard blasts New England with 80+ mph winds, feet of snow

1 day ago

Weather News

Florida wildfire grows fast amid extreme drought

18 hours ago

More Stories

Featured Stories

Weather News

Famous eagle Jackie lays new eggs after recent loss

16 hours ago

Astronomy

March adds daylight fast, a change bigger than most people realize

18 hours ago

Weather News

A 4-month-old bird flew over 8,000 miles nonstop across the Pacific

15 hours ago

Astronomy

Webb reveals Uranus’s upper atmosphere in unprecedented detail

14 hours ago

Astronomy

6 planets, moon will align on Saturday evening

1 day ago

World North America Canada Ontario Cornwall

Weather Near Cornwall:

  • Laval, Quebec
  • Montreal, Quebec
  • Ottawa, 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

...

...

...