Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be 12°C. Select a day from the live weather forecast for Thunder Bay, Ontario, Canada for more weather parameters.

Friday
8th May
12

-1

8

4
Saturday
9th May
9

2

1

4
Sunday
10th May
7

1

3

4
Monday
11th May
9

-1

8

2
Tuesday
12th May
7

-1

0

5

5-day weather forecast updated at 04:00 on Friday 8th May 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 Friday 8th May 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 12°C, maximum UV of 4 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the west.

12
°C maximum temperature
-1
°C minimum temperature
broken clouds
8
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
16
kph wind from W

Thunder Bay weather for Saturday 9th May 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 9°C, maximum UV of 4 (Moderate) and 1 hour of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 20 kph from the north-west.

9
°C maximum temperature
2
°C minimum temperature
broken clouds
1
hour of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
6
°C wind chill
20
kph wind from NW

Thunder Bay weather for Sunday 10th May 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 7°C, maximum UV of 4 (Moderate) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the north-west.

7
°C maximum temperature
1
°C minimum temperature
broken clouds
3
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
4
°C wind chill
17
kph wind from NW

Thunder Bay weather for Monday 11th May 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 9°C, maximum UV of 2 (Low) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the south.

9
°C maximum temperature
-1
°C minimum temperature
broken clouds
8
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
6
°C wind chill
13
kph wind from S

Thunder Bay weather for Tuesday 12th May 2026

Expect overcast skies in Thunder Bay, Ontario with a maximum temperature of 7°C, maximum UV of 5 (Moderate) and no hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the east.

7
°C maximum temperature
-1
°C minimum temperature
overcast skies
0
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
4
°C wind chill
16
kph wind from E

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Ontario - quick facts
Flight time^✝	8 hours
Time difference	UK -5 to -6 hours
Language(s)	English, French
Currency	Canadian Dollar
Electricity	A + B plug (120V)
Driving side	Right
Visa^✝	Yes