Alliston, Ontario

56° F
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Alliston, Ontario Weather
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Today

 Hourly Daily Radar MinuteCast Monthly Air Quality Health & Activities

Current Weather

4:47 PM

56°F
RealFeel® 54°
RealFeel Shade™ 50°
Air Quality Excellent
Wind NW 13 mph
Wind Gusts 22 mph
Partly sunny More Details

Current Air Quality

Today

5/17

12
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
Low
The risk of dust and dander allergy symptoms is low.
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
Low
The risk of catching a cold is low.
Flu
Low
The risk of catching the flu is low.
Migraine
Low
The risk of suffering from a weather-related migraine is low.
Asthma
Moderate
The risk of asthma symptoms is moderate.
Fishing
Fair
Fishing conditions are fair.
Running
Great
Conditions for running are great. Be sure to warm up and cool down adequately.
Golf
Good
Conditions for golfing are good. Wear sunscreen while out on the course.
Biking & Cycling
Great
Conditions for cycling are great. Be sure you have the correct gear to keep your core temperature warm during winter months and cool during hot weather.
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
Good
Conditions for stargazing are good. Be sure to move away from city lights or turn off nearby lights, including indoor and outdoor lights.
Hiking
Great
Conditions for hiking are great. Wear sunscreen and UV-protective clothing.
Lawn Mowing
Great
Conditions for lawn mowing are great. Ensure you are servicing your mower frequently to keep the blades sharp.
Composting
Poor
Composting conditions are poor. Keep your compost area covered.
Outdoor Entertaining
Fair
Conditions for outdoor entertaining will be fair. Pay attention to MinuteCast watch for upcoming rain showers.
Air Travel
Ideal
Conditions for flying are ideal. Have a safe trip.
Driving
Great
Conditions for driving are great. Remain prepared for changing weather by tracking ongoing forecasts.
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
Low
The risk for pest activity is low.
See all

TODAY’S WEATHER FORECAST

5/17
57°Hi
RealFeel® 59°
Partly sunny

TONIGHT’S WEATHER FORECAST

5/17
33°Lo
RealFeel® 35°
Cold with patchy clouds

TOMORROW’S WEATHER FORECAST

5/18
67°/ 45°
RealFeel® 68°
Becoming cloudy and milder

Looking Ahead

Thunderstorms, some strong, Saturday morning through Saturday evening

Alliston Weather Radar

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Alliston Weather Radar
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Weather Near Alliston:

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  • Mississauga Valley, Ontario ;
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