Saint John 7-day weather forecast

Written by:
August 11, 2025
ESOlex // Shutterstock

Saint John 7-day weather forecast

Stacker created the forecast for Saint John, New Brunswick using data from OpenWeather. This week's high is 31 °C on Monday, while the low is 11 °C on Saturday. There is expected to be 1 sunny day and rain on 3 days this week.

There are currently no weather alerts.

Monday, August 11

- High of 31 °C, low of 16 °C (63% humidity)
- Partly cloudy with a 0% chance of snow
- Very high risk of harm from sun exposure (7 UV index)
- Light breeze (16 km/h wind)
- Sunrise at 6:20 AM, sunset at 8:38 PM
1 / 6
Leonid Ikan // Shutterstock

Tuesday, August 12

- High of 27 °C, low of 15 °C (55% humidity)
- Partly cloudy with a 0% chance of snow
- High risk of harm from sun exposure (7 UV index)
- Light breeze (13 km/h wind)
- Sunrise at 6:22 AM, sunset at 8:36 PM
2 / 6
Marian Weyo // Shutterstock

Wednesday, August 13

- High of 25 °C, low of 16 °C (61% humidity)
- Mostly cloudy with a 100% chance of rain (1 mm of rain)
- High risk of harm from sun exposure (7 UV index)
- Light breeze (13 km/h wind)
- Sunrise at 6:23 AM, sunset at 8:35 PM
3 / 6
Leonid Ikan // Shutterstock

Thursday, August 14

- High of 23 °C, low of 16 °C (78% humidity)
- Overcast with a 100% chance of rain (2 mm of rain)
- High risk of harm from sun exposure (7 UV index)
- Light breeze (14 km/h wind)
- Sunrise at 6:24 AM, sunset at 8:33 PM
4 / 6
VOJTa Herout // Shutterstock

Friday, August 15

- High of 23 °C, low of 13 °C (38% humidity)
- Mostly sunny with a 0% chance of snow
- Light breeze (17 km/h wind)
- Sunrise at 6:25 AM, sunset at 8:31 PM
5 / 6
Onishchenko Natalya // Shutterstock

Saturday, August 16

- High of 22 °C, low of 11 °C (56% humidity)
- Mostly cloudy with a 0% chance of snow
- Light breeze (18 km/h wind)
- Sunrise at 6:26 AM, sunset at 8:30 PM
- Last quarter moon
6 / 6
Leonid Ikan // Shutterstock

Sunday, August 17

- High of 21 °C, low of 15 °C (75% humidity)
- Mostly cloudy with a 100% chance of rain (6 mm of rain)
- Light breeze (22 km/h wind)
- Sunrise at 6:28 AM, sunset at 8:28 PM

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