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

Castleton, Ontario

23°F
Location Chevron down
Location News Videos
Use Current Location
Recent

Castleton

Ontario

23°
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
Monday, January 19

Current Weather

1:03 PM

23°F
Light snow
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
RealFeel Shade™ 11°
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®
12°
RealFeel Shade™
11°
Max UV Index
0.5 (Low)
Wind
WSW 8 mph
Wind Gusts
21 mph
Humidity
90%
Indoor Humidity
31% (Dry)
Dew Point
20° F
Pressure
↓ 29.71 in
Cloud Cover
100%
Visibility
2 mi
Cloud Ceiling
5200 ft

Day

1/19
25°Hi
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
RealFeel Shade™ 11°
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
Cloudy with a little snow with little or no accumulation, then a leftover snow shower; very windy this afternoon; winds will be locally damaging
alerts

Yellow Warning - Snow Squall

12:24 PM Monday - 6:00 AM Tuesday

Max UV Index1.0 (Low)

AccuLumen Brightness Index™1 (Dark)

WindSW 18 mph

Wind Gusts47 mph

Probability of Precipitation90%

Probability of Thunderstorms5%

Precipitation0.07 in

Snow0.05 in

Hours of Precipitation5

Cloud Cover95%

Morning

Afternoon

Night

1/19
7°Lo
RealFeel® -10°
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
Strong winds subsiding; intermittent snow and flurries this evening with little or no accumulation; otherwise, mostly cloudy
alerts

Yellow Warning - Snow Squall

12:24 PM Monday - 6:00 AM Tuesday

WindW 18 mph

Wind Gusts43 mph

Probability of Precipitation65%

Probability of Thunderstorms0%

Precipitation0.00 in

Snow0.09 in

Hours of Precipitation3

Cloud Cover76%

Evening

Overnight

Sun & Moon

9 hrs 24 mins
Rise 7:40 AM
Set 5:04 PM
Waxing Crescent
Rise 8:27 AM
Set 5:59 PM

Temperature History

1/19
High
Low
Forecast
25°
7°
Average
30°
18°
Last Year
21°
11°

Further Ahead

Hourly

Daily

Monthly

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Winter Weather

Stormy late-January setup raises risk for snow and ice impacts

5 hours ago

Astronomy

Northern lights forecast: Aurora could reach as far south as Alabama

2 hours ago

Winter Weather

Clipper storm to spread snow over Upper Midwest, Northeast

7 hours ago

Astronomy

How to photograph aurora lights on your phone

2 hours ago

Climate

Western US faces worsening snow drought, with California the exception

2 days ago

More Stories

Featured Stories

Climate

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

2 days ago

Astronomy

NASA to roll out Artemis II rocket ahead of astronaut moon launch

2 days ago

Recreation

Death of 2 Florida students highlights risks of sand collapse

3 days ago

Astronomy

March’s total lunar eclipse will turn the moon red, here’s when to see...

5 days ago

Recreation

Rare and majestic sand sculptures only exist for minutes

3 days 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 RealFeel® and RealFeel Shade™ 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 RealFeel® and RealFeel Shade™ 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

...

...

...