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St. Thomas, Ontario

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St. Thomas, Ontario Weather
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Winter Center

Today

 WinterCast Hourly Daily Radar MinuteCast Monthly Air Quality Health & Activities

Current Weather

1:43 AM

35°F
RealFeel® 37°
Air Quality Fair
Wind NW 2 mph
Wind Gusts 4 mph
Mostly cloudy More Details

MINUTECAST®

No precipitation for at least 60 min

1:43 AM
2:43 AM

WinterCast

Wednesday Afternoon

Little to no accumulation
Snow
See More

Current Air Quality

Today

3/28

21
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

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
Moderate
The risk of experiencing weather-related arthritis pain is moderate. Stay hydrated and stretch to help avoid arthritis symptoms.
Sinus Pressure
High
The risk of weather-related sinus pressure is high. Taking a hot shower may help ease sinus pressure.
Common Cold
High
The risk of catching a cold is high. Using a humidifier can help increase humidity, which may help fight symptoms.
Flu
Moderate
The risk of catching the flu is moderate.
Migraine
Moderate
The risk of suffering from a weather-related migraine is moderate.
Asthma
Moderate
The risk of asthma symptoms is moderate.
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
Poor
Composting conditions are poor. Keep your compost area covered.
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
Good
Conditions for driving are good. Stay alert of any changes to the weather forecast.
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
Moderate
The risk for pest activity is moderate. Do not leave garbage or food open and unattended.
See all

TODAY’S WEATHER FORECAST

3/28
45°Hi
RealFeel® 43°
Variable cloudiness

TONIGHT’S WEATHER FORECAST

3/28
30°Lo
RealFeel® 27°
Mainly clear

TOMORROW’S WEATHER FORECAST

3/29
43°/ 20°
RealFeel® 30°
Showers of rain and snow

Looking Ahead

Mixed rain and snow tomorrow afternoon

Snowfall Probability

Snow expected tomorrow - see amounts

St. Thomas Weather Radar

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St. Thomas Weather Radar
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Weather Near St. Thomas:

  • Cleveland, OH
  • Hamilton, Ontario
  • London, Ontario
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