Alerts for: Greater Sudbury and vicinity


3:43 PM EDT Saturday 21 July 2018
Heat Warning in effect for:

  • Greater Sudbury and vicinity

Temperatures reaching 30 degrees Celsius are expected.

Hot conditions continue into the weekend.

A hot and moderately humid air mass has moved into the area and will remain in place through the weekend. Daytime temperatures are expected to reach 29 or 30 degrees. Overnight lows are forecast to fall to the upper teens providing little relief from the heat. Humidity levels are not expected to be particularly high, though humidex values to the mid-thirties will still be possible.

The passage of a cold front Sunday night will bring cooler temperatures and lower humidity for Monday and Monday night. The cool down is expected to be brief however, as high heat and humidity are forecast to return for the middle part of next week.

Extreme heat affects everyone.

Never leave people or pets inside a parked vehicle.

Heat warnings are issued when very high temperature or humidity conditions are expected to pose an elevated risk of heat illnesses, such as heat stroke or heat exhaustion.

Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to or tweet reports using #ONStorm.


What we are doing


Follow us on Twitter!

Get timely local #weather alerts directly to your Twitter feed

Lightning Safety

When thunder roars, GO INDOORS!

UV Index and sun protection

Be weather wise!

Date modified: