AccuWeather

St. Catharines, Ontario

70° F
Use your current location
Recent

St. Catharines

Ontario

70°
No results found.
Try searching for a city, zip code or point of interest.
settings
St. Catharines, Ontario Weather
Today Hourly Daily Radar MinuteCast Monthly Air Quality

Around the Globe

Hurricane Tracker

right arrow

Severe Weather

right arrow

Radar & Maps

right arrow
News

News & Features

right arrow

Astronomy

right arrow

Business

right arrow

Climate

right arrow

Health

right arrow

Recreation

right arrow

Sports

right arrow

Travel

right arrow

Video

right arrow

Podcasts

right arrow

Winter Center

right arrow
Chevron left
Chevron right

Today

 Hourly Daily Radar MinuteCast Monthly Air Quality

Current Weather

10:50 AM

70°F
RealFeel® 69°
RealFeel Shade™ 68°
Air Quality Fair
Wind NNW 10 mph
Wind Gusts 10 mph
Mostly cloudy More Details

Current Air Quality

22
AQI

Fair

The air quality is generally acceptable for most individuals. However, sensitive groups may experience minor to moderate symptoms from long-term exposure.

Based on Current Pollutants

More Details Arrow

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.

Allergy Outlook
Dust & Dander Moderate
See Weekly Outlook

TODAY’S WEATHER FORECAST

9/18
75°Hi
RealFeel® 77°
Partly sunny and pleasant

TONIGHT’S WEATHER FORECAST

9/18
54°Lo
RealFeel® 55°
Clear

TOMORROW’S WEATHER FORECAST

9/19
73°/ 53°
RealFeel® 75°
Nice with plenty of sunshine

St. Catharines Weather Radar

See Interactive Map
St. Catharines Weather Radar
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
St. Catharines Weather Radar

Further Ahead

Hourly

right arrow

Daily

right arrow

Monthly

right arrow

Around the Globe

Hurricane Tracker

right arrow

Severe Weather

right arrow

Radar & Maps

right arrow

News

right arrow

Video

right arrow

Podcasts

right arrow

Winter Center

right arrow

Top Stories

Hurricane

Odette bringing rough surf and rip currents to East Coast

4 hours ago

Weather News

Fires close in on iconic sequoia believed to be largest tree in world

17 hours ago
Live Blog

Daily coronavirus briefing: Panel of experts votes against booster

LATEST ENTRY

Maine COVID-19 ICU hospitalizations reach highest point in pandemic

12 hours ago

NYC skyscrapers struck by lightning

4 days ago 0:22

Podcast: So you want to be a meteorologist?

 More Stories

Popular Topics

LOCAL PEST FORECAST

Featured Stories

Upgrade your patio space with weather-durable outdoor furniture Comfy mattresses you can pick up on sale this Labor Day Volcano created ‘one of the best climates in the world’
World Chevron right
North America Chevron right
Canada Chevron right
Ontario Chevron right
St. Catharines

Weather Near St. Catharines:

Chevron left
Chevron right
  • 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 Podcast
Apps & Downloads
iPhone App Android App See all Apps & Downloads
Subscription Services
AccuWeather Premium AccuWeather Professional
More
AccuWeather Shop AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Weather Blogs Winter Weather
AccuWeather Downloads Facebook Twitter AccuWeather TV
Company
Proven Superior Accuracy About AccuWeather Digital Advertising Careers Press Contact Us
Products & Services
For Business For Partners For Advertising AccuWeather APIs Podcast
Apps & Downloads
iPhone App Android App See all Apps & Downloads
Subscription Services
AccuWeather Premium AccuWeather Professional
More
AccuWeather Shop AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Weather Blogs Winter Weather
AccuWeather Downloads Facebook Twitter AccuWeather TV
© 2021 AccuWeather, Inc. "AccuWeather" and sun design are registered trademarks of AccuWeather, Inc. All Rights Reserved.
Terms of Use | Privacy Policy | Cookie Policy | TAG Disclosure | Do Not Sell My Data 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.

FEEDBACK