Thunder Bay – Weather – Thunder Bay is starting Sunday with light snow falling at above-freezing temperatures, a sign of a very moist, unsettled air mass moving through. The barometer is low and falling (99.1 kPa), and wind will be the main headline today—gusts may reach 60 km/h early, then ease a bit later this afternoon. After a mild, damp stretch, colder air returns Monday night with temperatures dropping back below freezing.
Current Conditions (Observed 7:00 AM EDT, Sunday March 8, 2026)
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Condition: Light snow
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Temperature: 2.3°C (headline: 2°C)
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Wind: WSW 19 km/h, gusting 30 km/h
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Pressure: 99.1 kPa, falling
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Humidity: 86%
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Dew Point: 0.2°C
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Visibility: 24 km
With temperatures above 0°C and snow falling, expect wet snow/slushy buildup on untreated surfaces, especially early this morning.
Today (Sunday)
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Morning: Periods of snow ending early, then cloudy with 40% chance of flurries or rain showers
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Near noon: Becoming a mix of sun and cloud
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Wind: SW 20 gusting 40, becoming W 40 gusting 60 early this morning, easing to 20 gusting 40 late afternoon
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High: 9°C
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UV Index: 2 (Low)
Expected Conditions (Next Three Days)
Tonight (Sunday Night)
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Sky: Cloudy
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Precip: 60% chance of showers late evening and overnight
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Wind: W 20 gusting 40 becoming light early evening; wind becoming W 20 before morning
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Low: +2°C
Monday, March 9
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Sky: A mix of sun and cloud
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Precip: 60% chance of rain showers, changing to 30% chance of flurries or rain showers in the morning
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Wind: West 30 km/h, becoming light in the afternoon
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High: +3°C
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UV Index: 3 (Moderate)
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Night: Cloudy with 30% chance of flurries, low -9°C
Tuesday, March 10
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Day: A mix of sun and cloud, high -4°C
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Night: 30% chance of flurries, low -12°C
Wardrobe Recommendations
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This morning: Dress for wet snow + wind. A water-resistant outer layer and waterproof boots help a lot.
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Midday/afternoon: With 9°C possible, you’ll likely want layers you can peel off—but keep something windproof for the gusts.
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Tonight: Showers and damp air—bring a hood or umbrella.
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Monday night and Tuesday: The temperature drop is sharp. Keep winter gear handy again (gloves, toque, warmer coat), especially for early mornings.
Weather Trivia
When pressure drops into the 99 kPa range and keeps falling, it often signals a strong low-pressure system nearby. That’s why days like today tend to be windy and changeable, with precipitation flipping between snow, rain, and mixed showers as temperatures wobble around freezing.
Weather Overview
Thunder Bay weather update for Sunday, March 8, 2026: light snow at 2°C this morning with falling pressure (99.1 kPa). Wind increases with gusts up to 60 km/h early, then a mix of sun and cloud near noon and a high of 9°C. Tonight brings a 60% chance of showers and a low of +2°C. Monday stays unsettled with rain showers, then colder air returns Monday night with lows near -9°C.
