THUNDER BAY – WEATHER – Thunder Bay is opening the new week with a raw winter feel rather than a spring warm-up. Environment Canada’s hourly forecast showed flurries around 8:00 AM EDT Monday, temperatures near -4°C, and northwest winds around 20 km/h, while the detailed forecast called for a day of lingering flurries, gusty winds, and a temperature that would fall to -8°C this morning before rising later. The temperature normals for this day are Max7°C.Min-5°C..
Before heading out on the roads today, it is a good idea to check 511on.ca for the latest updates. As of 7:00 AM all roads show open across the region.
Today’s Weather Overview
Current Conditions
This is one of those April days that looks deceptive on the calendar. Environment Canada says flurries will end this morning, followed by mainly cloudy skies and a 30 percent chance of more flurries, with a local amount near 2 cm. Winds are expected to become northwest 20 km/h gusting to 40, and the wind chill will sit near -15 for part of the day.
The hourly forecast sharpens that picture: temperatures were expected to dip from about -4°C at 8:00 AM to -8°C by late morning, with wind chills hovering in the -14 to -15 range before moderating slightly later in the afternoon. By late day, skies should begin to break a little, shifting from mainly cloudy toward a mix of sun and cloud.
Tomorrow’s Forecast
Expected Conditions
Tonight will be the coldest part of this short stretch. Environment Canada calls for partly cloudy skies, clearing late this evening, and a low of -15°C. The wind should ease late tonight, but wind chill values are still expected to drop to around -20 overnight.
Tuesday, April 7 looks much better. Sunshine returns with a high of 3°C, light wind, and a bright sky, though the day starts bitterly cold with a morning wind chill near -19. Tuesday night then turns cloudier again, with a 40 percent chance of flurries and a low of -6°C.
The midweek forecast keeps Thunder Bay in a stop-and-start spring pattern. Wednesday, April 8 brings periods of snowand a high near 0°C, followed by a 60 percent chance of snow or rain Wednesday night and a low of -1°C. Conditions improve again on Thursday and Friday, with a mix of sun and cloud and highs around 5°C, then a slightly milder 7°C on Saturday.
Wardrobe Recommendations
Monday still calls for winter layers. A heavier coat, gloves, and a hat are a smart choice this morning, especially with wind chills in the mid-minus teens and gusty northwest winds. Tuesday afternoon will feel better in the sun, but the early morning cold still means winter gear stays relevant for school runs and commutes.
Travel Outlook
There may be no active alert in effect, but Monday morning is still not especially friendly for travel. Flurries, gusty winds, and the colder early-day temperatures mean drivers should stay alert for patchy slick spots, especially on exposed roads, bridges, ramps, and untreated side streets. That caution is an inference based on the forecast for morning flurries, gusty winds, and sub-freezing temperatures.
Weather Trivia
Thunder Bay’s forecast high of 3°C on Tuesday and 5°C later this week shows how uneven early April can be on the north shore of Lake Superior. One day still looks and feels like February, and two days later the city edges back toward more typical spring weather. That final sentence is an interpretation based on Environment Canada’s multi-day forecast.
Summary: Thunder Bay weather for April 6, 2026: a cold, windy Monday brings flurries, gusty northwest winds, and wind chills near -15 before clearing tonight and sunnier weather returns Tuesday.
