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Thunder Bay weather live forecast
Today's maximum temperature in Thunder Bay is expected to be 8°C. Select a day from the live weather forecast for Thunder Bay, Ontario, Canada for more weather parameters.
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Wednesday
15th Apr -
Thursday
16th Apr -
Friday
17th Apr -
Saturday
18th Apr -
Sunday
19th Apr
5-day weather forecast updated at 04:00 on Wednesday 15th April 2026 GMT
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The 5-day weather forecast for Ontario (Thunder Bay) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.
Thunder Bay weather forecast by day
Below are the detailed weather forecasts for Thunder Bay for the next 5 days.
Thunder Bay weather for Wednesday 15th April 2026
Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 8°C, maximum UV of 5 (Moderate) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the north-west.
- °C maximum temperature
- °C minimum temperature
- broken clouds
- hours of sunshine
- UV index (Moderate)
- mm of rainfall expected
- °C wind chill
- kph wind from NW
Thunder Bay weather for Thursday 16th April 2026
Expect fog in low lying areas in Thunder Bay, Ontario with a maximum temperature of 9°C, maximum UV of 5 (Moderate) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the south-east.
- °C maximum temperature
- °C minimum temperature
- fog in low lying areas
- hours of sunshine
- UV index (Moderate)
- mm of rainfall expected
- °C wind chill
- kph wind from SE
Thunder Bay weather for Friday 17th April 2026
Expect isolated thunderstorms in Thunder Bay, Ontario with a maximum temperature of 7°C, maximum UV of 5 (Moderate) and 1 hour of bright sunshine. There are 5-10 mm of rainfall expected with 92% chance of some rain and a gentle breeze of 16 kph from the east.
- °C maximum temperature
- °C minimum temperature
- isolated thunderstorms
- hour of sunshine
- UV index (Moderate)
- % chance of some rain
- mm of rainfall expected
- °C wind chill
- kph wind from E
Thunder Bay weather for Saturday 18th April 2026
Expect cloudy with sleet or snow in Thunder Bay, Ontario with a maximum temperature of 3°C, maximum UV of 3 (Moderate) and 1 hour of bright sunshine. There are 2-5 mm of sleet/snow expected with 68% chance of some sleet or snow and a moderate breeze of 24 kph from the north-west.
- °C maximum temperature
- °C minimum temperature
- cloudy with sleet or snow
- hour of sunshine
- UV index (Moderate)
- % chance of some sleet or snow
- mm of sleet/snow expected
- °C wind chill
- kph wind from NW
Thunder Bay weather for Sunday 19th April 2026
Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of 2°C, maximum UV of 4 (Moderate) and 3 hours of bright sunshine. There are 0-2 cm of snow expected with 23% chance of some snow and a moderate breeze of 23 kph from the north-west.
- °C maximum temperature
- °C minimum temperature
- mostly cloudy with light snow
- hours of sunshine
- UV index (Moderate)
- % chance of some snow
- cm of snow expected
- °C wind chill
- kph wind from NW
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