Thunder Bay starts Thursday below freezing under mainly sunny skies, with a Yellow Frost Advisory in effect for the city.

Current Conditions

Observed at Thunder Bay Airport at 7:00 AM EDT:

Condition: Mainly sunny
Temperature: -1.7°C
Wind Chill: -4
Wind: WNW 5 km/h
Humidity: 91%
Pressure: 103.1 kPa and rising
Visibility: 32 km

Frost Advisory

Frost is expected this morning, with temperatures near or below freezing. Patchy frost may return tonight into Friday morning. Sensitive plants, trees, and crops could be damaged.

Gardeners should cover plants, bring containers indoors, and hold off planting tender annuals.

Today’s Forecast

Sunny skies dominate, with southeast winds increasing to 20 km/h late this morning.

High: 15°C
UV Index: 6, or high

Weekend Outlook

Tonight: Clear, low -1°C with patchy frost.
Friday: Sunny, high 13°C.
Saturday: Cloudy with a 60% chance of showers, high 12°C.
Sunday: Cloudy with a 40% chance of showers, high 11°C.

Looking Ahead

A major warm-up arrives Monday with highs near 24°C, followed by 22°C Tuesday and Wednesday.