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St. Catharines, Ontario

45° F
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St. Catharines, Ontario Weather
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Today

 Hourly Daily Radar MinuteCast WinterCast Monthly Air Quality

Current Weather

5:51 PM

45°F
RealFeel® 28°
Air Quality Excellent
Wind W 27 mph
Wind Gusts 36 mph
Mostly cloudy More Details

WinterCast

Friday Evening - Late Friday Night

Little to no accumulation
Snow
1 Upcoming Storm See More

Current Air Quality

16
AQI

Excellent

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

Based on Current Pollutants

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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
Tree Pollen Low
Grass Pollen Low
Ragweed Pollen Low
Mold Low
Dust & Dander Moderate
See Weekly Outlook

TODAY’S WEATHER FORECAST

12/2
54°Hi
RealFeel® 43°
Strong winds subsiding

TONIGHT’S WEATHER FORECAST

12/2
32°Lo
RealFeel® 21°
Winds gradually subsiding

TOMORROW’S WEATHER FORECAST

12/3
38°/ 29°
RealFeel® 34°
Mostly cloudy and colder

Looking Ahead

Mixed rain and snow tomorrow evening

Snowfall Probability

Snow expected Saturday - see amounts

St. Catharines Weather Radar

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St. Catharines Weather Radar

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St. Catharines

Weather Near St. Catharines:

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  • Brampton, Ontario ;
  • Mississauga Valley, Ontario ;
  • Toronto, Ontario
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