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Thunder Bay
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Canada weather

10 day weather forecast for Thunder Bay

Monday, 20th July 2026, at 10:26
today
Squall Warning
Sunny
29° 16°
tomorrow
Patchy rain possible
18° 11°
Wednesday
Sunny
23° 8°
Thursday
Partly cloudy
25° 11°
Friday
Partly cloudy
19° 12°
Saturday
Patchy rain possible
27° 13°
Sunday
Patchy rain possible
26° 16°
 More Details See
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Thunder Bay Weather Pages

Thunder Bay weather forecast

The weather forecast for Thunder Bay for today indicates warm conditions with temperatures around 29 °C.

Rain is expected on Monday, Tuesday, and Friday.

Wind speeds are expected to be breezy, averaging around 19 km/h.

On Tuesday, expect a change in weather with temperatures reaching 18°C, and light showers with a 44% chance.

Weather today
Thunder Bay weather forecast

Thunder Bay 14 days weather forecast

This weeks weather in Thunder Bay. Click on a date for detailed forecasts
Mon. 20
29°
16°
Weather Alert
Sunny
5.3 mm
Tue. 21
18°
11°
Patchy rain possible
0.6 mm
Wed. 22
23°
8°
Sunny
0 mm
Thu. 23
25°
11°
Partly cloudy
0.1 mm
Fri. 24
19°
12°
Partly cloudy
0.9 mm
Sat. 25
27°
13°
Patchy rain possible
2.7 mm
Sun. 26
26°
16°
Patchy rain possible
3.9 mm
Mon. 27
22°
13°
Sunny
0 mm
Tue. 28
21°
11°
Sunny
0 mm
Wed. 29
20°
11°
Sunny
0 mm
Thu. 30
22°
11°
Sunny
0 mm
Fri. 31
27°
13°
Sunny
0 mm
Sat. 1
22°
12°
Sunny
0 mm
Sun. 2
17°
12°
Partly cloudy
2.5 mm
Further Ahead
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Access Thunder Bay weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
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Thunder Bay long range weather forecast

30 day weather forecast for Thunder Bay
June
August
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Patchy rain possible
24°
2
Overcast
23°
3
Overcast
22°
4
Overcast
21°
5
Patchy rain possible
21°
6
Overcast
21°
7
Patchy rain possible
22°
8
Partly cloudy
19°
9
Moderate rain at times
22°
10
Moderate or heavy rain shower
20°
11
Cloudy
21°
12
Overcast
25°
13
Sunny
27°
14
Cloudy
28°
15
Patchy rain possible
21°
16
Partly cloudy
20°
17
Heavy rain at times
20°
18
Patchy rain possible
23°
19
Sunny
22°
20
Weather Alert Sunny
29°
21
Patchy rain possible
18°
22
Sunny
23°
23
Partly cloudy
25°
24
Partly cloudy
19°
25
Patchy rain possible
27°
26
Patchy rain possible
26°
27
Sunny
22°
28
Sunny
21°
29
Sunny
20°
30
Sunny
22°
31
Sunny
27°
Important Notice
Our Thunder Bay long range weather forecast is based on historical data analysis rather than real-time forecasting models. While this provides a general outlook, weather conditions can change. We recommend checking the forecast closer to your planned date for the most current information.

Rain Forecast for the Next 14 Days in Thunder Bay

The chart displays the expected rainfall values (in mm) over the next 14 days in Thunder Bay, highlighting variations in precipitation levels for specific dates. ☔

Thunder Bay Wind Speed Forecast Chart

This chart illustrates the projected daily max wind speed (in km) in Thunder Bay over the next two weeks, providing insights into periods of increased or decreased wind activity. 🌀

Frequently asked questions about the weather in Thunder Bay

How warm is it in Thunder Bay over the next 14 days?
Over the next two weeks, temperatures in Thunder Bay are expected to range from around 8 °C on the coldest nights up to about 29 °C on the warmest days. Use this range to plan what to pack and wear.

Will it rain in Thunder Bay in the next two weeks?
Yes - rain is expected on about 7 of the next 14 days in Thunder Bay, with roughly 16 mm of rainfall in total. It is worth keeping an umbrella or raincoat handy.

How windy is it in Thunder Bay?
Maximum wind speeds in Thunder Bay are forecast to reach about 29 km/h at their peak over the next 14 days.

When is the best time to visit Thunder Bay?
For a month-by-month look at temperatures and rainfall, see our best time to visit Thunder Bay guide.

How accurate is the 14-day forecast for Thunder Bay?
Our Thunder Bay forecast uses leading meteorological models and is most reliable over the next few days. Long-range days beyond a week show general trends and can change, so check back closer to the date for updates.

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Location coordinates Where is Thunder Bay?

Get accurate weather forecasts for Thunder Bay, located at latitude 48.382 and longitude -89.25. Stay updated with localized weather information tailored for Thunder Bay.

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