THUNDER BAY – Monday morning has a quieter feel across Thunder Bay. There are no weather alerts in effect, and the city is starting the day under partly cloudy skies with a colder early-morning bite than the recent milder stretch.
Today’s Weather Overview
Current Conditions
At 6:00 AM EDT at Thunder Bay Airport, the temperature was -8.8°C, rounded to -9°C on the forecast page. Winds were west-southwest at 8 km/h, creating a wind chill of -13. Humidity was 92 percent, barometric pressure was 102.7 kPa and rising, and visibility was 24 km under partly cloudy skies.
Environment Canada says Monday will begin mainly cloudy with a 30 percent chance of flurries early this morning, then clear through the morning. Winds will turn southerly near noon and increase to 20 km/h, with a daytime high of +2°C. The morning will feel much colder than the afternoon, with a wind chill near -14 early in the day.
Tomorrow’s Forecast
Expected Conditions
Tonight, clouds increase again, and Thunder Bay has a 60 percent chance of flurries late this evening and overnight. Winds will ease later in the evening, and the low will fall to -4°C, with an evening wind chill near -8.
Tuesday looks like the mildest day in the short-term forecast, with a mix of sun and cloud and a high of +4°C. Tuesday night turns cloudy with a low of -12°C. The middle of the week shifts back toward unsettled weather, with a 60 percent chance of snow Wednesday and a high of -3°C, followed by periods of snow Wednesday night and Thursday.
Wardrobe Recommendations
It is still a winter-coat morning in Thunder Bay. Gloves and a hat make sense early, especially with the wind chill in the minus teens. By afternoon, the sunshine and a temperature above freezing should make conditions more comfortable, but the evening cooldown and returning flurry risk mean layered clothing is still the best plan.
Weather Trivia
Thunder Bay’s seasonal normal for this point in March is a daytime high of 3°C and an overnight low of -8°C. Monday’s forecast high of +2°C is close to normal, even though the morning start feels sharper. The city is also enjoying longer spring daylight, with sunrise at 7:54 AM and sunset at 8:14 PM.
Weather Synopsis
Thunder Bay weather for March 23, 2026: no alerts are in effect as the city wakes to partly cloudy skies, a temperature near -9°C, and a colder start before sunshine and a high of +2°C.
