Ontario  Air Quality Health Index  Provincial Summary
Forecast Regions
Location and sublocations  Current Observation  Forecast Maximums  

Saturday  Saturday night  Sunday  
Barrie  1 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 
Belleville  2 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 
Brampton  2 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 
Brantford  2 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 
Burlington  2 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 
Chatham  2 Low Risk 
3 Low Risk 
3 Low Risk 
4 Moderate Risk 
Cornwall  1 Low Risk 
2 Low Risk 
2 Low Risk 
2 Low Risk 
Dorset  2 Low Risk 
2 Low Risk 
2 Low Risk 
2 Low Risk 
Grand Bend  2 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 
Guelph  2 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 
Hamilton  2 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 
2 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 

2 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 

2 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 

Kingston  1 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 
Kitchener  2 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 
London  2 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 
Mississauga  2 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 
Newmarket  2 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 
North Bay  1 Low Risk 
2 Low Risk 
2 Low Risk 
2 Low Risk 
Oakville  2 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 
Oshawa  2 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 
Ottawa  1 Low Risk 
2 Low Risk 
2 Low Risk 
2 Low Risk 
1 Low Risk 
2 Low Risk 
2 Low Risk 
2 Low Risk 

1 Low Risk 
2 Low Risk 
2 Low Risk 
2 Low Risk 

Parry Sound  1 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 
Petawawa  1 Low Risk 
2 Low Risk 
2 Low Risk 
2 Low Risk 
Peterborough  2 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 
Port Stanley  2 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 
Sarnia  2 Low Risk 
3 Low Risk 
3 Low Risk 
4 Moderate Risk 
Sault Ste. Marie  1 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 
St. Catharines  2 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 
Sudbury  1 Low Risk 
2 Low Risk 
2 Low Risk 
2 Low Risk 
Thunder Bay  1 Low Risk 
2 Low Risk 
2 Low Risk 
2 Low Risk 
Tiverton  2 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 
Toronto  2 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 
2 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 

2 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 

2 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 

2 Low Risk 
2 Low Risk 
2 Low Risk 
3 Low Risk 

Windsor  3 Low Risk 
3 Low Risk 
3 Low Risk 
4 Moderate Risk 
2 Low Risk 
3 Low Risk 
3 Low Risk 
4 Moderate Risk 

3 Low Risk 
3 Low Risk 
3 Low Risk 
4 Moderate Risk 
1. Forecast issued at: 6:00 AM EDT Saturday 19 August 2017
What we are doing
Weather Forecasts
Weather Alerts
Weather Resources
Features
UV Index and sun protection
Be weather wise!
Extreme Heat Protection
Be prepared!
Lightning Safety
When thunder roars, GO INDOORS!