Go Back

St. Catharines, Ontario

39°F
Location Chevron down
Location News Videos
Use Current Location
Recent

St. Catharines

Ontario

39°
No results found.
Try searching for a city, zip code or point of interest.
settings Let's Chat
St. Catharines, 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

Video

Winter Center

Today

 WinterCast Hourly Daily Radar MinuteCast Monthly Air Quality Health & Activities

Current Weather

10:59 PM

39°F
RealFeel® 34°
Air Quality Excellent
Wind WNW 5 mph
Wind Gusts 9 mph
Cloudy More Details

WinterCast

Late Sunday Night

Little to no accumulation
Snow
See More

Current Air Quality

Today

12/10

18
AQI

Excellent

The air quality is ideal for most individuals; enjoy your normal outdoor activities.

Based on Current Pollutants

More Details

Learn more at Plumb Labs Logo

Current Air Quality

Our current air quality index (AQI) provides information on the quality of air that you are breathing and its impact on your health. There are at least six different pollutants that we track that impact the cleanliness of air and your health.

Health & Activities
See all
Dust & Dander
Moderate
The risk of dust and dander allergy symptoms is moderate. Closing your windows on windy days can help prevent outside dust or dander from getting into your home.
Arthritis
Very High
The risk of experiencing weather-related arthritis pain is very high. Avoid high-impact exercises and embrace low-impact ones like walking.
Sinus Pressure
Moderate
The risk of weather-related sinus pressure is moderate. Make sure you stay hydrated.
Common Cold
Moderate
The risk of catching a cold is moderate.
Flu
Moderate
The risk of catching the flu is moderate.
Migraine
Low
The risk of suffering from a weather-related migraine is low.
Asthma
Low
The risk of asthma symptoms is low.
Fishing
Poor
Fishing conditions are poor.
Running
Poor
Conditions for running are poor. Lightening and extremely cold temperatures are unsafe for outdoor runners.
Golf
Poor
Conditions for golfing are poor. Do not play if there is a chance of lightning.
Biking & Cycling
Poor
Conditions for cycling are poor. Avoid outdoor activity if there is a chance of lightning or in extremely cold temperatures.
Beach & Pool
Poor
Conditions for a day at the beach or pool are poor. Stay out of the water if there is a chance of lightning. Only swim in water temperatures below 55 degrees if you have the proper gear.
Stargazing
Poor
Conditions for stargazing are poor.
Hiking
Poor
Conditions for hiking are poor.
Lawn Mowing
Poor
Conditions for lawn mowing are poor. Avoid mowing your lawn when it is wet, or temperatures are too cold.
Composting
Fair
Composting conditions are fair. All materials you add should be shredded or broken into smaller pieces.
Outdoor Entertaining
Poor
Conditions for outdoor entertaining will be poor. Consider moving your party indoors or under some form of cover.
Air Travel
Ideal
Conditions for flying are ideal. Have a safe trip.
Driving
Fair
Conditions for driving are fair. Keep up with your car maintenance, such as inspecting your windshield wipers and checking your tire treads.
Mosquitos
Low
The risk for mosquito activity are low.
Indoor Pests
High
The risk for pest activity is high. Replacing outdoor lights with yellow bug lights can attract less insects near your home.
Outdoor Pests
High
The risk for pest activity is high. Replacing outdoor lights with yellow bug lights can attract less insects.
See all

TONIGHT’S WEATHER FORECAST

12/10
35°Lo
RealFeel® 21°
Rain, then snow; breezy late

TOMORROW’S WEATHER FORECAST

12/11
39°/ 33°
RealFeel® 24°
Flurries; breezy, colder

Snowfall Probability

Snow expected tomorrow - see amounts

St. Catharines Weather Radar

See Interactive Map
St. Catharines Weather Radar
Static Radar Temporarily Unavailable
Thank you for your patience as we work to get everything up and running again.
Refresh Page
See Interactive Map

Further Ahead

Hourly

Daily

Monthly

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Weather News

Freezing temps, power outages as tornado cleanup begins

1 hour ago

Weather News

At least 6 dead after tornadoes rip through Tennessee

1 hour ago

Severe Weather

Heavy rain, high winds causing havoc along the Eastern Seaboard

7 hours ago

Winter Weather

Snow, cold winds to follow rainstorm in Northeast

7 hours ago

Astronomy

Geminids to sparkle with over 100 meteors per hour Wednesday night

8 hours ago

 More Stories

Featured Stories

Live Blog

Photo Blog: Mount Etna's fire and ice'

LATEST ENTRY

Fire and ice: Mount Etna spews lava onto snowy peak

2 days ago

Astronomy

Astronaut Frank Rubio lost a tomato in space. His colleagues found it

2 days ago

Travel

Almost half the men surveyed think they could land a passenger plane

4 days ago

Travel

The stunning 30-hour train ride that sells out in minutes

2 days ago

Weather News

Treat your elf to a stay in Santa Claus’ cabin this Christmas season

5 days ago
World North America Canada Ontario St. Catharines

Weather Near St. Catharines:

  • 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 RealFeel® and RealFeel Shade™
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™
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
© 2023 AccuWeather, Inc. "AccuWeather" and sun design are registered trademarks of AccuWeather, Inc. All Rights Reserved.
Terms of Use | Privacy Policy | Cookie Policy | Do Not Sell or Share My Personal Information checkmark Confirmed Not Selling Your Data

We have updated our Privacy Policy and Cookie Policy.

I Understand

Get AccuWeather alerts as they happen with our browser notifications.

Notifications Enabled

Thanks! We’ll keep you informed.

Let's Chat –
AccuAssistant™
ComScore