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St. Catharines, Ontario

84°F
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St. Catharines, Ontario Weather
Today WinterCast Local {stormName} Tracker Hourly Daily Radar MinuteCast Monthly Air Quality Health & Activities

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Winter Center
Today

Hourly

 Daily Radar MinuteCast Monthly Air Quality Health & Activities

4 PM

85°
RealFeel® 91°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 7%
Chevron down
Partly sunny
alerts

Heat Warning

3:09 PM Monday - 10:00 AM Friday
alerts

Special Air Quality Statement

3:09 PM Monday - 4:09 AM Tuesday

RealFeel Shade™85°

WindWNW 7 mph

Air QualityUnhealthy

Max UV Index5 (Moderate)

Wind Gusts8 mph

Humidity55%

Indoor Humidity55% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover41%

Visibility10 mi

Cloud Ceiling30000 ft

5 PM

86°
RealFeel® 91°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 7%
Chevron down
Partly sunny
alerts

Heat Warning

3:09 PM Monday - 10:00 AM Friday
alerts

Special Air Quality Statement

3:09 PM Monday - 4:09 AM Tuesday

RealFeel Shade™86°

WindWSW 6 mph

Air QualityUnhealthy

Max UV Index3 (Moderate)

Wind Gusts7 mph

Humidity53%

Indoor Humidity53% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover31%

Visibility10 mi

Cloud Ceiling30000 ft

6 PM

85°
RealFeel® 88°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 7%
Chevron down
Partly sunny
alerts

Heat Warning

3:09 PM Monday - 10:00 AM Friday
alerts

Special Air Quality Statement

3:09 PM Monday - 4:09 AM Tuesday

RealFeel Shade™86°

WindSW 7 mph

Air QualityUnhealthy

Max UV Index2 (Low)

Wind Gusts10 mph

Humidity56%

Indoor Humidity56% (Very Humid)

Dew Point68° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover31%

Visibility10 mi

Cloud Ceiling30000 ft

7 PM

83°
RealFeel® 86°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 5%
Chevron down
Partly sunny
alerts

Heat Warning

3:09 PM Monday - 10:00 AM Friday
alerts

Special Air Quality Statement

3:09 PM Monday - 4:09 AM Tuesday

RealFeel Shade™84°

WindSSW 8 mph

Air QualityUnhealthy

Max UV Index1 (Low)

Wind Gusts16 mph

Humidity61%

Indoor Humidity61% (Very Humid)

Dew Point68° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover31%

Visibility10 mi

Cloud Ceiling30000 ft

8 PM

81°
RealFeel® 84°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 0%
Chevron down
Mostly sunny
alerts

Heat Warning

3:09 PM Monday - 10:00 AM Friday
alerts

Special Air Quality Statement

3:09 PM Monday - 4:09 AM Tuesday

RealFeel Shade™84°

WindSSW 7 mph

Air QualityUnhealthy

Max UV Index0 (Low)

Wind Gusts17 mph

Humidity68%

Indoor Humidity68% (Very Humid)

Dew Point70° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover11%

Visibility10 mi

Cloud Ceiling30000 ft

9 PM

79°
RealFeel® 81°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 0%
Chevron down
Mostly clear
alerts

Heat Warning

3:09 PM Monday - 10:00 AM Friday
alerts

Special Air Quality Statement

3:09 PM Monday - 4:09 AM Tuesday

WindSSW 8 mph

Air QualityUnhealthy

Wind Gusts16 mph

Humidity74%

Indoor Humidity74% (Very Humid)

Dew Point70° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover11%

Visibility10 mi

Cloud Ceiling30000 ft

10 PM

76°
RealFeel® 78°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 0%
Chevron down
Mostly clear
alerts

Heat Warning

3:09 PM Monday - 10:00 AM Friday
alerts

Special Air Quality Statement

3:09 PM Monday - 4:09 AM Tuesday

WindSSW 7 mph

Air QualityUnhealthy

Wind Gusts15 mph

Humidity81%

Indoor Humidity81% (Very Humid)

Dew Point70° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover11%

Visibility10 mi

Cloud Ceiling30000 ft

11 PM

73°
RealFeel® 75°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 0%
Chevron down
Mostly clear
alerts

Heat Warning

3:09 PM Monday - 10:00 AM Friday
alerts

Special Air Quality Statement

3:09 PM Monday - 4:09 AM Tuesday

WindSSW 7 mph

Air QualityUnhealthy

Wind Gusts13 mph

Humidity88%

Indoor Humidity88% (Very Humid)

Dew Point69° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover11%

Visibility10 mi

Cloud Ceiling30000 ft

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Weather Near St. Catharines:

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