Calculated at 10:00 pm EST Thursday, December 4, 2025

| Period | Forecast maximum (Issued at 6:12 am EST December 4, 2025) | |
|---|---|---|
| Thursday | 2 - Low Risk | ![]() |
| Thursday night | 2 - Low Risk | ![]() |
| Friday | 3 - Low Risk | ![]() |
See the Ontario Ministry of the Environment, Conservation and Parks air quality health messages.
Note: AQHI readings on this web page are based on automatically polled data and have not undergone final verification.