THUNDER BAY – Tuesday is starting on a calmer note across the city, with no alerts in effect and a cooler, partly cloudy morning at Thunder Bay Airport. The day should improve into a mix of sun and cloud with a high of 3°C, but the break will be short-lived as periods of snow are expected to begin before morning on Wednesday.
Today’s Weather Overview
Current Conditions
At 7:00 AM EDT Tuesday, Thunder Bay Airport was reporting partly cloudy skies, a temperature of -1.8°C, pressure at 102.3 kPa and rising, humidity at 74 percent, and visibility at 24 km. Winds were from the west-northwest at 11 km/h, creating a wind chill of -6.
Environment Canada says Tuesday will bring a mix of sun and cloud, with northwest winds at 20 km/h gusting to 40easing later this morning. The afternoon high is forecast to reach 3°C, although it will feel colder early, with a morning wind chill near -8.
Tomorrow’s Forecast
Expected Conditions
Tonight, skies will become cloudy, and periods of snow will begin before morning. The low is forecast to fall to -6°C, with an overnight wind chill near -10.
Wednesday looks unsettled, with periods of snow and expected accumulation of 2 to 4 cm. The daytime high should reach 2°C, but the morning will still feel colder, with a wind chill near -7. Snow is expected to continue Wednesday night, with a low of -8°C.
Beyond that, Thursday cools off again with a 40 percent chance of flurries and a high of -2°C, followed by a sharp overnight drop to -18°C under clear skies. Friday stays sunny but cold, with a high of -3°C, before temperatures recover into the weekend, including 5°C on Sunday and 6°C on Monday.
Wardrobe Recommendations
Tuesday still starts like a winter morning, so a warm jacket, gloves, and a hat make sense early in the day. By afternoon, lighter layers should be comfortable for many people, but with snow returning tonight and Wednesday, waterproof footwear and a winter coat should stay close at hand. This is one of those late-March stretches where spring shows up in short bursts, then backs away again.
Weather Trivia
Thunder Bay’s normal high for late March is typically just a few degrees above freezing, so Tuesday’s 3°C is close to where the season should be. What stands out more is the swing in conditions: sunshine today, fresh snow by Wednesday, and then a hard freeze again Thursday night. That kind of back-and-forth is classic northwestern Ontario spring weather. This last point is an inference based on the official forecast pattern.
Overview
Thunder Bay weather for March 24, 2026: partly cloudy and cooler this morning with no alerts in effect, a high of 3°C this afternoon, then snow returning tonight and Wednesday.
