THUNDER BAY – WEATHER DESK – Thunder Bay is starting Sunday on a quieter note after Saturday’s messy mix of snow, drizzle, and slippery conditions. Environment Canada’s alert page showed no alerts in effect for the city Sunday morning, and the day began much colder than the near-freezing weather seen late Saturday.
Today’s Weather Overview
Current Conditions
At 7:00 AM EDT at Thunder Bay Airport, conditions were partly cloudy with a temperature of -10.0°C. The wind was northwest at 6 km/h, producing a wind chill of -14. Humidity was 77 percent, pressure was 101.9 kPa and rising, and visibility stood at 24 km. By comparison, the airport had been reporting light drizzle and temperatures near 0°C on Saturday evening, a sign that colder air moved back in overnight.
Environment Canada’s Sunday forecast calls for a mainly cloudy day with a 40 percent chance of flurries early this morning. Winds from the north at 20 km/h gusting to 40 were expected to ease this afternoon. The daytime high is forecast to reach -1°C, with a wind chill near -18 this morning and -5 this afternoon.
Tomorrow’s Forecast
Expected Conditions
Tonight turns cloudy with winds up to 15 km/h and a low of -9°C. The wind chill is expected to sit near -5 this eveningand drop to around -14 overnight.
Monday brings a modest improvement, with a mix of sun and cloud and a high of 2°C. South winds are expected to strengthen to 20 km/h near noon, but the morning will still feel cold, with a wind chill near -14. Monday night brings flurries and a low of -6°C. Tuesday stays mostly unsettled, with cloudy skies and a 60 percent chance of flurries, a high of 1°C, and a colder low of -14°C Tuesday night. By Wednesday, periods of snow return, with a daytime high of -4°C.
Wardrobe Recommendations
Thunder Bay is back in winter-clothing territory this morning. A warm coat, gloves, and a hat are a good idea early in the day, especially with the wind chill in the minus teens. Even though temperatures should moderate a bit Monday, the pattern remains cold enough that layered clothing and sturdy footwear still make sense for the next few days.
Weather Trivia
Environment Canada lists Thunder Bay’s normals for this stretch of March at 3°C for the daytime high and -8°C for the overnight low. Sunday’s forecast high of -1°C is therefore a little below seasonal, while the city is now enjoying longer daylight, with sunrise at 7:56 AM and sunset at 8:13 PM.
Synopsis
Thunder Bay weather for March 22, 2026: no alerts are in effect this morning as the city wakes to partly cloudy skies, a temperature of -10°C, and a colder start after Saturday’s near-freezing drizzle.
