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

Castleton, Ontario

13°F
Location Chevron down
Location News Videos
Use Current Location
Recent

Castleton

Ontario

13°
No results found.
Try searching for a city, zip code or point of interest.
Create Account Unlock extended daily forecasts and additional saved locations — all with your free account.
Let's Go Chevron right
Have an account already? Login
settings
Castleton, 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
Wednesday, February 18

Day

2/18
29°Hi
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
RealFeel Shade™ 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
Considerable cloudiness and colder

Max UV Index1.0 (Low)

WindWNW 18 mph

Wind Gusts32 mph

Probability of Precipitation25%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover95%

Night

2/18
16°Lo
RealFeel® 0°
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
Partly cloudy

WindW 16 mph

Wind Gusts31 mph

Probability of Precipitation25%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover73%

Sun & Moon

10 hrs 38 mins
Rise 7:06 AM
Set 5:44 PM
Waxing Crescent
Rise 7:38 AM
Set 7:19 PM

Temperature History

2/18
High
Low
Forecast
29°
16°
Average
29°
16°
Last Year
21°
10°

Further Ahead

Hourly

Daily

Monthly

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Winter Weather

Major snow, ice storm to affect 150 million across South, East U.S.

3 hours ago

Winter Weather

Snow buries Russia's Kamchatka Peninsula, but don't believe the videos

5 hours ago

Winter Weather

More snow, lake-effect to accumulate in the Midwest, Northeast

6 hours ago

Winter Weather

Dangerously cold air to surge through dozens of states later this week

6 hours ago

Weather News

Deadly wildfires burned across southern Chile amid extreme heat and wi...

7 hours ago

 More Stories

Featured Stories

Astronomy

Rare purple, blue aurora appeared during Monday night's solar storm

7 hours ago

Winter Weather

Massive 100-vehicle crash shuts down highway, multiple injured

12 hours ago

Climate

Western US faces worsening snow drought, with California the exception

4 days ago

Climate

Why this famous iceberg turned blue and what it says about melting ice

4 days ago

Weather News

High-speed train crash kills dozens in Spain, many more injured

1 day ago
World North America Canada Ontario Castleton

Weather Near Castleton:

  • Markham, 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

...

...

...