For Wednesday the predicted weather in Thunder Bay is mostly sunny with some rain. The maximum temperature is a pleasant 21°C (70°F), while the minimum temperature is a mild 14°C (57°F).

Tomorrow's weather - Thursday 1 Oct

The forecast for Thunder Bay on Thursday is mostly sunny. High temperatures will reach a mild 17°C (63°F), with lows dropping to around 11°C (52°F).

10-Day Weather Forecast

Over the next 10 days, temperatures in Thunder Bay will be will get cooler from 21°C (70°F) down to 15°C (59°F), with average daytime highs of 15°C (59°F) and nighttime lows of 8°C (46°F) over this period. Compared to September norms, this represents a bit cooler than usual weather. There will be plenty of sunshine during this period. Rainfall is expected to be a bit less than usual (compared to typical September conditions). The forecast shows mixed conditions, with some heavy rain showers especially on Sat, Sun, Wed. There will be rain on around 3 days (Sat, Sun, Wed).

Weather Forecast FAQ for Thunder Bay

When will be the warmest day next week?

The warmest day is expected to be Wednesday with a high of 21°C (70°F).

When will be the coldest day?

The coldest day is forecasted for Monday with a low of 3°C (37°F).

Will it rain next week in Thunder Bay?

Yes, rain is expected on 3 days , specifically on Sat, Sun, Wed.

How much rainfall is expected next week?

A total of 16 mm (0.6 in) of rain is forecasted for the 10-day period.

What will be the temperature range next week?

Temperatures will range from 3°C (37°F) to 21°C (70°F).

More about Thunder Bay

Explore the full Thunder Bay climate overview with monthly averages, or check rainfall data and temperature by month.

Thunder Bay weather by month

Browse monthly averages for Thunder Bay: climate by month with temperature, rainfall and sunshine.

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