Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be 22°C. Select a day from the live weather forecast for Thunder Bay, Ontario, Canada for more weather parameters.

Sunday
31st May
22

4

15

8
Monday
1st Jun
19

6

16

7
Tuesday
2nd Jun
21

6

16

7
Wednesday
3rd Jun
25

6

8

8
Thursday
4th Jun
22

9

0

6

5-day weather forecast updated at 04:00 on Sunday 31st 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 Sunday 31st May 2026

Expect clear skies in Thunder Bay, Ontario with a maximum temperature of 22°C, maximum UV of 8 (Very High) and 15 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the south-east.

22
°C maximum temperature
4
°C minimum temperature
clear skies
15
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
22
°C wind chill
10
kph wind from SE

Thunder Bay weather for Monday 1st June 2026

Expect clear skies in Thunder Bay, Ontario with a maximum temperature of 19°C, maximum UV of 7 (High) and 16 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the east.

19
°C maximum temperature
6
°C minimum temperature
clear skies
16
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
19
°C wind chill
17
kph wind from E

Thunder Bay weather for Tuesday 2nd June 2026

Expect clear skies in Thunder Bay, Ontario with a maximum temperature of 21°C, maximum UV of 7 (High) and 16 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the south-east.

21
°C maximum temperature
6
°C minimum temperature
clear skies
16
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
21
°C wind chill
12
kph wind from SE

Thunder Bay weather for Wednesday 3rd June 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 25°C, maximum UV of 8 (Very High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the south.

25
°C maximum temperature
6
°C minimum temperature
broken clouds
8
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
25
°C wind chill
17
kph wind from S

Thunder Bay weather for Thursday 4th June 2026

Expect isolated thunderstorms in Thunder Bay, Ontario with a maximum temperature of 22°C, maximum UV of 6 (High) and no hours of bright sunshine. There are 5-10 mm of rainfall expected with 66% chance of some rain and a gentle breeze of 14 kph from the south-west.

22
°C maximum temperature
9
°C minimum temperature
isolated thunderstorms
0
hours of sunshine
6
UV index (High)
66
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
14
kph wind from SW

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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