Thunder Bay Weather: Snowy Start, But Sunshine is on the Way

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Toys for the North 2023
The HUD on the Hercules RCAF at Thunder Bay International Airport - Toys for the North 2023

Flurries Today, but a Brighter Midweek Ahead

Thunder Bay sees snow today with 2–4 cm expected. A warming trend brings sunshine midweek, but cold mornings and flurries stick around

Thunder Bay is starting Monday under cloudy skies, with the temperature sitting at -4.5°C. A light north wind at 4 km/h is making it feel like -6°C, but with humidity at 78%, it’s a damp cold that lingers in the air.

The barometric pressure is at 101.7 kPa, and visibility is 16 km, indicating stable but snowy conditions on the horizon.

Monday: Snowfall on the Way

Expect a 60% chance of early morning flurries, followed by periods of steady snow beginning later this morning. Snowfall amounts will range from 2 to 4 cm. Winds will remain light, up to 15 km/h, and temperatures will climb slightly to a high of 1°C.

The wind chill will make it feel like -12°C this morning, so don’t let the thermometer fool you—layers are still essential. The UV index remains low at 1, meaning it’s not a particularly bright day.

Tonight: More Snow Before Clouds Take Over

Snow will continue through the evening, tapering off by midnight, though a 40% chance of flurries lingers overnight. Another 2 to 4 cm of snow is possible. Winds remain light at up to 15 km/h, with temperatures dropping to -5°C and a wind chill of -8°C.

Tuesday: A Cloudy Start, but a Warm-Up

Tuesday begins with mainly cloudy skies and a 40% chance of morning flurries. The wind will shift north at 20 km/h by late morning, adding a bite to the air. However, temperatures will rise to 6°C, marking the start of a warming trend. The morning wind chill will still feel like -9°C, so winter gear is still recommended early in the day.

Tuesday night will bring cloudy periods with a 40% chance of snow and a low of -7°C.

Midweek Outlook: Sun Returns, but Cold Nights Persist

  • Wednesday: Sunny with a high of 4°C—a break from the recent gloom!
  • Wednesday Night: Clear skies, but temperatures dip to -12°C.
  • Thursday: A mix of sun and cloud with a 30% chance of flurries, high of 2°C.
  • Thursday Night: Clear and cold, low of -12°C.
  • Friday: Sunny with a high of 3°C—a promising start to the weekend!

What to Wear?

For today, a winter coat, gloves, and a hat are still needed, especially with the wind chill. Snow boots will also come in handy. By Tuesday afternoon, a lighter jacket may be an option, but cold mornings will stick around, so don’t pack away the winter gear just yet!

Weather Trivia: March in Thunder Bay—Unpredictable as Ever

March in Thunder Bay has seen everything from spring-like warmth to deep winter cold. The warmest March 17th on record was 19.5°C in 2012, while the coldest was a bone-chilling -35.0°C in 1965. Today’s mix of snow and mild temperatures sits somewhere in the middle!

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