Go Back
AccuWeather meteorologists release 2023 Canada summer forecast. Find out what's expected for the upcoming season. Chevron right

Alliston, Ontario

58°F
Location Chevron down
Location News Videos
Use Current Location
Recent

Alliston

Ontario

58°
No results found.
Try searching for a city, zip code or point of interest.
settings
Alliston, Ontario Weather
Today WinterCast Local {stormName} Tracker Hourly Daily Radar MinuteCast Monthly Air Quality Health & Activities

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

News & Features

Astronomy

Business

Climate

Health

Recreation

Sports

Travel

Video

Podcasts

Winter Center

Today

Hourly Daily Radar MinuteCast Monthly Air Quality Health & Activities

Current Weather

12:25 AM

58°F
RealFeel® 57°
Air Quality Fair
Wind ESE 5 mph
Wind Gusts 5 mph
Clear More Details

Current Air Quality

Tuesday

5/30

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

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
Low
The risk of experiencing weather-related arthritis pain is low.
Sinus Pressure
Moderate
The risk of weather-related sinus pressure is moderate. Make sure you stay hydrated.
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
Great
Fishing conditions are great. Find an area with less boat or human activity to avoid areas where fish are hiding.
Running
Great
Conditions for running are great. Be sure to warm up and cool down adequately.
Golf
Great
Conditions for golfing are great. Stay hydrated when spending time in the sun.
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
Great
Conditions for a day at the beach or pool are great. Remember to stay hydrated.
Stargazing
Ideal
Conditions for stargazing are ideal. Check a star chart or an astronomy app before you head out to make the most of the night.
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
Fair
Composting conditions are fair. All materials you add should be shredded or broken into smaller pieces.
Outdoor Entertaining
Great
Conditions for outdoor entertaining will be great. Pay attention to the mosquito or pest forecast and prepare deterrents.
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
Moderate
The risk for pest activity is moderate. Do not leave garbage or food open and unattended.
See all

TODAY’S WEATHER FORECAST

5/30
84°Hi
RealFeel® Sun 90°
Mostly sunny and very warm

TONIGHT’S WEATHER FORECAST

5/30
57°Lo
RealFeel® 56°
Clear

TOMORROW’S WEATHER FORECAST

5/31
86°/ 55°
RealFeel® Sun 93°
Sunny and very warm

Alliston Weather Radar

See Interactive Map
Alliston 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

Further Ahead

Hourly

Daily

Monthly

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Podcasts

Winter Center

Top Stories

Severe Weather

Severe thunderstorms to end May with a bang

6 hours ago

Severe Weather

Rough waters cause scare aboard Carnival Cruise

6 hours ago

Weather News

4 great white sharks detected in waters off NY and NJ

9 hours ago

Hurricane

Deadly Typhoon Mawar churns closer to Philippines

11 hours ago

Weather Forecasts

Temperatures to surge in Midwest, Northeast

6 hours ago

More Stories

Featured Topic

Your Local Asthma Forecast

Featured Stories

Weather News

Chasing the light: NYC’s Manhattanhenge returns this week

13 hours ago

Weather News

Four dead after tourist boat capsizes in Italy’s Lake Maggiore

10 hours ago

Time-lapse video shows tornado from beginning to end in Texas

19 hours ago 0:26
World North America Canada Ontario Alliston

Weather Near Alliston:

  • 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 AccuWeather Connect Podcast RealFeel® and RealFeel Shade™
Apps & Downloads
iPhone App Android App See all Apps & Downloads
Subscription Services
AccuWeather Premium AccuWeather Professional
More
AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center
Company
Proven Superior Accuracy About AccuWeather Digital Advertising Careers Press Contact Us
Products & Services
For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect Podcast RealFeel® and RealFeel Shade™
Apps & Downloads
iPhone App Android App See all Apps & Downloads
Subscription Services
AccuWeather Premium AccuWeather Professional
More
AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center
© 2023 AccuWeather, Inc. "AccuWeather" and sun design are registered trademarks of AccuWeather, Inc. All Rights Reserved.
Terms of Use | Privacy Policy | Cookie Policy | 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