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

Chelmsford, Ontario

21°F
Location Chevron down
Location News Videos
Use Current Location
Recent

Chelmsford

Ontario

21°
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
Chelmsford, 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

Tue, 3/10, 8:00 PM - Thu, 3/12, 2:00 AM

Snow

0.15 - 0.25 in

Wed, 3/11, 7:00 AM - Thu, 3/12, 12:00 AM

Ice

9 AM

23°
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 49%
Chevron down
Cloudy
alerts

Yellow Warning - Winter Storm

2:25 AM Wednesday - 11:00 AM Wednesday

RealFeel Shade™4°

WindNE 20 mph

Air QualityFair

Max UV Index0.3 (Low)

Wind Gusts33 mph

Humidity80%

Indoor Humidity29% (Very Dry)

Dew Point18° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover100%

Visibility10 mi

Cloud Ceiling1600 ft

10 AM

23°
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 49%
Chevron down
Cloudy
alerts

Yellow Warning - Winter Storm

2:25 AM Wednesday - 11:00 AM Wednesday

RealFeel Shade™4°

WindNE 20 mph

Air QualityFair

Max UV Index0.5 (Low)

Wind Gusts32 mph

Humidity81%

Indoor Humidity29% (Very Dry)

Dew Point18° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover100%

Visibility10 mi

Cloud Ceiling1600 ft

11 AM

23°
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 70%
Chevron down
Sleet

RealFeel Shade™2°

WindNE 18 mph

Air QualityFair

Max UV Index0.6 (Low)

Wind Gusts31 mph

Humidity82%

Indoor Humidity30% (Dry)

Dew Point19° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover100%

Snowtrace

Ice0.02 in

Visibility6 mi

Cloud Ceiling1600 ft

12 PM

24°
RealFeel® 3°
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 71%
Chevron down
Sleet

RealFeel Shade™3°

WindNE 18 mph

Air QualityFair

Max UV Index0.7 (Low)

Wind Gusts30 mph

Humidity83%

Indoor Humidity30% (Dry)

Dew Point19° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover100%

Snowtrace

Ice0.02 in

Visibility6 mi

Cloud Ceiling2200 ft

1 PM

24°
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 49%
Chevron down
Cloudy

RealFeel Shade™6°

WindNE 18 mph

Air QualityFair

Max UV Index0.9 (Low)

Wind Gusts28 mph

Humidity84%

Indoor Humidity30% (Dry)

Dew Point19° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover100%

Visibility10 mi

Cloud Ceiling2200 ft

2 PM

24°
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 48%
Chevron down
Cloudy

RealFeel Shade™4°

WindNNE 21 mph

Air QualityFair

Max UV Index0.8 (Low)

Wind Gusts32 mph

Humidity85%

Indoor Humidity30% (Dry)

Dew Point20° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover100%

Visibility10 mi

Cloud Ceiling2100 ft

3 PM

24°
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 49%
Chevron down
Cloudy

RealFeel Shade™4°

WindNNE 21 mph

Air QualityFair

Max UV Index0.7 (Low)

Wind Gusts31 mph

Humidity84%

Indoor Humidity30% (Dry)

Dew Point20° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover100%

Visibility10 mi

Cloud Ceiling2100 ft

4 PM

23°
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 67%
Chevron down
Flurries

RealFeel Shade™2°

WindNNE 21 mph

Air QualityFair

Max UV Index0.5 (Low)

Wind Gusts30 mph

Humidity85%

Indoor Humidity30% (Dry)

Dew Point19° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover100%

Snowtrace

Visibility10 mi

Cloud Ceiling2000 ft

5 PM

22°
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 65%
Chevron down
Sleet

RealFeel Shade™-1°

WindNNE 21 mph

Air QualityFair

Max UV Index0.3 (Low)

Wind Gusts30 mph

Humidity86%

Indoor Humidity30% (Dry)

Dew Point19° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover100%

Snowtrace

Ice0.02 in

Visibility6 mi

Cloud Ceiling2000 ft

6 PM

22°
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 66%
Chevron down
Sleet

RealFeel Shade™-2°

WindN 20 mph

Air QualityFair

Max UV Index0.1 (Low)

Wind Gusts29 mph

Humidity87%

Indoor Humidity29% (Very Dry)

Dew Point18° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover100%

Snowtrace

Ice0.02 in

Visibility6 mi

Cloud Ceiling2000 ft

7 PM

21°
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
rain drop 49%
Chevron down
Cloudy

RealFeel Shade™0°

WindN 20 mph

Air QualityFair

Max UV Index0.0 (Low)

Wind Gusts31 mph

Humidity87%

Indoor Humidity29% (Very Dry)

Dew Point18° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover100%

Visibility10 mi

Cloud Ceiling2000 ft

8 PM

20°
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 44%
Chevron down
Cloudy

WindNNW 15 mph

Air QualityFair

Wind Gusts25 mph

Humidity86%

Indoor Humidity28% (Very Dry)

Dew Point17° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover94%

Visibility10 mi

Cloud Ceiling2000 ft

9 PM

19°
RealFeel® 3°
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 48%
Chevron down
Cloudy

WindNNW 14 mph

Air QualityFair

Wind Gusts27 mph

Humidity87%

Indoor Humidity28% (Very Dry)

Dew Point16° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover94%

Visibility10 mi

Cloud Ceiling2000 ft

10 PM

18°
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 52%
Chevron down
Sleet

WindNNW 14 mph

Air QualityFair

Wind Gusts25 mph

Humidity88%

Indoor Humidity27% (Very Dry)

Dew Point15° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover94%

Snow0.28 in

Ice0.03 in

Visibility3 mi

Cloud Ceiling2000 ft

11 PM

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 65%
Chevron down
Sleet

WindNNW 14 mph

Air QualityFair

Wind Gusts25 mph

Humidity88%

Indoor Humidity26% (Very Dry)

Dew Point14° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover94%

Snow0.27 in

Ice0.03 in

Visibility3 mi

Cloud Ceiling2000 ft

Further Ahead

Tomorrow

Friday

Daily

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Severe Weather

Severe outbreak in 20+ states brings nighttime tornado danger

7 minutes ago
Live Blog

Live updates: Tornadoes hit central US amid severe weather outbreak

LATEST ENTRY

Deadly night as tornadoes, record-breaking hail sweep Texas, Illinois and Indiana

23 minutes ago

Winter Weather

High winds to roar from Rockies to Northeast with northern tier snow

2 hours ago

Severe Weather

Why nighttime tornadoes are 2.5 times more deadly

19 hours ago

Weather Forecasts

Wintry weather to return: Arctic air to whisk away warmth in East

2 hours ago

 More Stories

Featured Stories

Travel

FAA launches air taxi test program in 26 states

21 hours ago

Weather News

Indiana just changed the law for rescuing pets trapped in hot cars

20 hours ago

Weather News

Huge fire in Scotland triggers train chaos, partial collapse of histor...

22 hours ago

Recreation

25-year-old becomes 1st American woman to row solo across Atlantic

4 days ago

Weather News

Louisiana rocked by 4 earthquakes days after strongest quake in decade...

1 day ago
World North America Canada Ontario Chelmsford

Weather Near Chelmsford:

  • Barrie, Ontario
  • Greater Sudbury, Ontario
  • Rouyn-Noranda, Quebec
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

...

...

...