Thunder Bay – Weather – The city is starting Monday on the cold side under mostly cloudy skies, but a noticeable warm-up is on the way.

As winds turn westerly this morning, temperatures climb above freezing this afternoon. A few flurries may brush through early, then conditions trend quieter tonight before another mild day Tuesday.

For today, as it warms up, make sure to top up your vehicle’s windshield washer fluid. Also realise that puddles at corners are likely.

Today’s Weather Overview

Thunder Bay is mostly cloudy with a crisp early-morning bite.

• Temperature: -17.2°C

• Wind: NNW 3 km/h

• Wind Chill: -20

• Humidity: 70%

• Dew Point: -21.4°C

• Pressure: 102.7 kPa (falling) — a hint that weather is on the move

• Visibility: 24 km

Today (Monday)

• Sky: A mix of sun and cloud

• Flurries: 40% chance of flurries this morning

• Wind: Becoming west 20 km/h gusting to 40 this morning

• High: +2°C

• UV Index: 2 (Low)

• Travel note: The jump from deep morning cold to above-freezing temps can create slippery spots on untreated sidewalks and parking lots, especially where melt begins.

Expected Conditions (Next Three Days)

Tonight (Monday Night)

• Sky: Partly cloudy this evening, becoming cloudy near midnight

• Wind: West 20 km/h becoming light early this evening

• Low: -9°C

• Wind Chill: Near -12 overnight

Tuesday, March 3

• Sky: Mainly cloudy

• Flurries: 30% chance in the morning and early afternoon

• High: +4°C

• Night: Cloudy periods, low -8°C

Wednesday, March 4

• Sky: A mix of sun and cloud

• High: +4°C

• Night: Cloudy with 30% chance of flurries, low -4°C

Wardrobe Recommendations

• This morning: Dress for -17°C and wind chill near -20—a warm parka, insulated gloves or mitts, toque, and a neck warmer will make a big difference.

• This afternoon: With +2°C expected, use layers you can shed (hoodie/fleece under a lighter winter coat works well).

• Tonight and Tuesday morning: It drops back to -9°C to -8°C, so keep winter gear handy—especially if you’re out early.

• Footwear: Waterproof boots are smart today as melting begins, with the risk of refreeze in shaded areas tonight.

Weather Trivia

A falling barometer (like today’s pressure trend) often signals an approaching change in weather. Even if the sky doesn’t look dramatic yet, that pressure drop is one of the best clues that winds and cloud cover can shift quickly.

Summary

Thunder Bay weather for Monday, March 2, 2026: mostly cloudy and -17°C early with wind chill -20 and falling pressure. A mix of sun and cloud today with a 40% chance of morning flurries, west wind gusting to 40 km/h, and a high of +2°C. Mild Tuesday near +4°C with a slight chance of flurries.