
ESOlex // Shutterstock
Thunder Bay 7-day weather forecast
Stacker created the forecast for Thunder Bay, Ontario using data from OpenWeather. This week's high is 7 °C on Wednesday, while the low is -1 °C on Tuesday. There are expected to be 0 sunny days, snow on 1 day, and 4 days of rain this week.
There are currently no weather alerts.
Monday, April 21
- High of 5 °C, low of 1 °C (95% humidity)- Overcast with a 100% chance of rain (5 mm of rain)
- Moderate risk of harm from sun exposure (2 UV index)
- Light breeze (22 km/h wind)
- Sunrise at 6:54 AM, sunset at 8:56 PM

1 / 6
Cari Rubin Photography // Shutterstock
Tuesday, April 22
- High of 4 °C, low of -1 °C (85% humidity)
- Mostly cloudy with a 0% chance of snow
- Moderate risk of harm from sun exposure (4 UV index)
- Light breeze (13 km/h wind)
- Sunrise at 6:52 AM, sunset at 8:57 PM
- Mostly cloudy with a 0% chance of snow
- Moderate risk of harm from sun exposure (4 UV index)
- Light breeze (13 km/h wind)
- Sunrise at 6:52 AM, sunset at 8:57 PM

2 / 6
Marian Weyo // Shutterstock
Wednesday, April 23
- High of 7 °C, low of 1 °C (95% humidity)
- Overcast with a 20% chance of snow (0 mm of snow)
- Light breeze (13 km/h wind)
- Sunrise at 6:51 AM, sunset at 8:59 PM
- Overcast with a 20% chance of snow (0 mm of snow)
- Light breeze (13 km/h wind)
- Sunrise at 6:51 AM, sunset at 8:59 PM

3 / 6
alisalipa // Shutterstock
Thursday, April 24
- High of 4 °C, low of 2 °C (94% humidity)
- Overcast with a 100% chance of rain (5 mm of rain)
- Moderate risk of harm from sun exposure (3 UV index)
- Light breeze (16 km/h wind)
- Sunrise at 6:49 AM, sunset at 9:00 PM
- Overcast with a 100% chance of rain (5 mm of rain)
- Moderate risk of harm from sun exposure (3 UV index)
- Light breeze (16 km/h wind)
- Sunrise at 6:49 AM, sunset at 9:00 PM

4 / 6
Zyabich // Shutterstock
Friday, April 25
- High of 6 °C, low of 2 °C (90% humidity)
- Overcast with a 100% chance of rain (3 mm of rain)
- Light breeze (18 km/h wind)
- Sunrise at 6:47 AM, sunset at 9:01 PM
- Overcast with a 100% chance of rain (3 mm of rain)
- Light breeze (18 km/h wind)
- Sunrise at 6:47 AM, sunset at 9:01 PM

5 / 6
VOJTa Herout // Shutterstock
Saturday, April 26
- High of 7 °C, low of 1 °C (53% humidity)
- Partly cloudy with a 0% chance of snow
- Light breeze (17 km/h wind)
- Sunrise at 6:45 AM, sunset at 9:03 PM
- Partly cloudy with a 0% chance of snow
- Light breeze (17 km/h wind)
- Sunrise at 6:45 AM, sunset at 9:03 PM

6 / 6
1981 Rustic Studio kan // Shutterstock
Sunday, April 27
- High of 7 °C, low of 0 °C (65% humidity)
- Partly cloudy with a 58% chance of rain (0 mm of rain)
- Light breeze (14 km/h wind)
- Sunrise at 6:44 AM, sunset at 9:04 PM
- New moon
- Partly cloudy with a 58% chance of rain (0 mm of rain)
- Light breeze (14 km/h wind)
- Sunrise at 6:44 AM, sunset at 9:04 PM
- New moon