Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be 28°C. Select a day from the live weather forecast for Thunder Bay, Ontario, Canada for more weather parameters.

Friday
29th May
28

7

14

7
Saturday
30th May
14

7

15

7
Sunday
31st May
21

4

16

7
Monday
1st Jun
18

6

15

7
Tuesday
2nd Jun
20

6

16

7

5-day weather forecast updated at 04:00 on Friday 29th 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 29th May 2026

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 7 (High) and 14 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the east.

28
°C maximum temperature
7
°C minimum temperature
scattered clouds
14
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
12
kph wind from E

Thunder Bay weather for Saturday 30th May 2026

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 14°C, maximum UV of 7 (High) and 15 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the east.

14
°C maximum temperature
7
°C minimum temperature
scattered clouds
15
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
17
kph wind from E

Thunder Bay weather for Sunday 31st May 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 10 kph from the south.

21
°C maximum temperature
4
°C minimum temperature
clear skies
16
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
10
kph wind from S

Thunder Bay weather for Monday 1st June 2026

Expect clear skies in Thunder Bay, Ontario with a maximum temperature of 18°C, maximum UV of 7 (High) and 15 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the east.

18
°C maximum temperature
6
°C minimum temperature
clear skies
15
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
18
°C wind chill
14
kph wind from E

Thunder Bay weather for Tuesday 2nd June 2026

Expect clear skies in Thunder Bay, Ontario with a maximum temperature of 20°C, maximum UV of 7 (High) and 16 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the south-east.

20
°C maximum temperature
6
°C minimum temperature
clear skies
16
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
10
kph wind from SE

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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