Thunder Bay 7-day weather forecast

Written by:
March 23, 2026
ESOlex // Shutterstock

Thunder Bay 7-day weather forecast

created the forecast for Thunder Bay, Ontario using data from . This week's high is 10 掳C on Thursday, while the low is -7 掳C on Sunday. There is expected to be 1 sunny day and rain on 3 days this week.

There are currently no weather alerts.

Monday, April 13

- High of 6 掳C, low of 2 掳C (99% humidity)
- Overcast with a 0% chance of snow
- Moderate risk of harm from sun exposure (3 UV index)
- Light breeze (23 km/h wind)
- Sunrise at 7:10 AM, sunset at 8:44 PM
1 / 6
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Tuesday, April 14

- High of 4 掳C, low of 1 掳C (98% humidity)
- Overcast with a 100% chance of rain (5 mm of rain)
- Light breeze (14 km/h wind)
- Sunrise at 7:08 AM, sunset at 8:45 PM
2 / 6
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Wednesday, April 15

- High of 2 掳C, low of 0 掳C (89% humidity)
- Overcast with a 0% chance of snow
- Moderate risk of harm from sun exposure (4 UV index)
- Light air (12 km/h wind)
- Sunrise at 7:06 AM, sunset at 8:46 PM
3 / 6
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Thursday, April 16

- High of 10 掳C, low of 1 掳C (75% humidity)
- Mostly sunny with a 0% chance of snow
- High risk of harm from sun exposure (5 UV index)
- Light air (11 km/h wind)
- Sunrise at 7:04 AM, sunset at 8:48 PM
4 / 6
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Friday, April 17

- High of 7 掳C, low of 2 掳C (97% humidity)
- Overcast with a 100% chance of rain (13 mm of rain)
- Light breeze (21 km/h wind)
- Sunrise at 7:02 AM, sunset at 8:49 PM
- New moon
5 / 6
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Saturday, April 18

- High of 6 掳C, low of -2 掳C (69% humidity)
- Overcast with a 100% chance of rain (5 mm of rain)
- Light breeze (20 km/h wind)
- Sunrise at 7:00 AM, sunset at 8:51 PM
6 / 6
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Sunday, April 19

- High of 4 掳C, low of -7 掳C (30% humidity)
- Mostly cloudy with a 0% chance of snow
- Gentle breeze (28 km/h wind)
- Sunrise at 6:58 AM, sunset at 8:52 PM

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