Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™

Alliston, Ontario

85°F
Location Chevron down
Location News Videos
Use Current Location
Recent

Alliston

Ontario

85°
No results found.
Try searching for a city, zip code or point of interest.
Get Premium+
Create Your Account Unlock extended daily and hourly forecasts — all with your free account.
Let's Go Chevron right
Have an account already? Log In
settings
Help
Alliston, Ontario Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day 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

For Business

Warnings

Data Suite

Forensics

Advertising

Superior Accuracy™

Video

Winter Center

Today

Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities
Orange Warning - Heat

Today's Weather

Thu, Jul 2

Sunny to partly cloudy, hot and humid; a strong thunderstorm in the area this afternoon; storms can bring flooding downpours and localized damaging wind gusts Hi: 91°

Tonight: A thunderstorm in spots early this evening; otherwise, partly cloudy, very warm and humid Lo: 70°

Current Weather

12:34 PM

85°F
RealFeel® 95°
Sunny More Details
RealFeel Shade™ 87°
Heat Index 89°
Wind WSW 9 mph
Wind Gusts 9 mph
Air Quality Poor

Looking Ahead

Watch for a strong thunderstorm this afternoon

Alliston Weather Radar

Alliston Weather Radar
Static Radar Temporarily Unavailable
Thank you for your patience as we work to get everything up and running again.
Refresh Page
Clouds
Temperature

Hourly Weather

1 PM 88°
rain drop 6%
2 PM 89°
rain drop 19%
3 PM 90°
rain drop 19%
4 PM 91°
rain drop 24%
5 PM 90°
rain drop 43%
6 PM 87°
rain drop 47%
7 PM 85°
rain drop 51%
8 PM 82°
rain drop 43%
9 PM 80°
rain drop 51%
10 PM 77°
rain drop 47%
11 PM 76°
rain drop 34%
12 AM 74°
rain drop 34%

10-Day Weather Forecast

Today

7/2

91° 70°

Hot; a strong p.m. t-storm

Night: A t-storm around this evening

55%

Fri

7/3

84° 66°

Very warm with a thunderstorm

A thunderstorm in spots

55%

Sat

7/4

80° 58°

Variable clouds, a t-storm

Partly cloudy

55%

Sun

7/5

79° 60°

Some sun, then turning cloudy

Cloudy

1%

Mon

7/6

77° 60°

Partly sunny and pleasant

A crystal-clear sky

25%

Tue

7/7

80° 60°

Mostly sunny

A crystal-clear sky

25%

Wed

7/8

81° 60°

An afternoon t-storm or two

A crystal-clear sky

62%

Thu

7/9

85° 61°

Plenty of sunshine

Mainly clear

1%

Fri

7/10

81° 60°

Mostly sunny

Rain tapering to showers

17%

Sat

7/11

82° 63°

A couple of showers

Clear

68%

Sun & Moon

15 hrs 26 mins
Rise 5:40 AM
Set 9:06 PM
Waning Gibbous
Rise 11:01 PM
Set 9:05 AM

Air Quality

See More
Air Quality Poor

The air has reached a high level of pollution and is unhealthy for sensitive groups. Reduce time spent outside if you are feeling symptoms such as difficulty breathing or throat irritation.

Allergy Outlook

See All
Dust & Dander Extreme Data is not supported in this location

Top Stories

Weather Forecasts

Fourth of July week furnace: Dangerous heat dome for 250 million

6 hours ago

Weather News

America 250 events are being canceled, reshaped as heat dome grips US

4 hours ago

Weather Forecasts

Heat furnace to flip from eastern to western U.S. next week

28 minutes ago

Live Blog

Live: World Cup 2026 weather updates

LATEST ENTRY

USA wins first World Cup knockout match in decades, advances to Round of 16

2 hours ago

Severe Weather

Thunderstorms to circle massive heat furnace into Fourth of July

6 hours ago

More Stories

Featured Stories

Weather News

2 climbers scale Empire State Building during dangerous heat wave

21 hours ago

Astronomy

Asteroid Day marks 1908 impact as scientists ready for new discoveries

2 days ago

Weather News

Chicks fly from nest of famous California eagles Jackie and Shadow

2 days ago

Astronomy

A viral sunset and dueling meteor showers are coming in July

1 day ago

Recreation

12-year-old injured by bison in Yellowstone National Park

3 days ago

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 Personal Weather Stations
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 Personal Weather Stations
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
© 2026 AccuWeather, Inc. "AccuWeather" and sun design are registered trademarks of AccuWeather, Inc. All Rights Reserved.
Terms of Use | Privacy Policy | Cookie Policy | About Your Privacy Do Not Sell or Share My Personal Information | Data Sources

...

...

...