
St. John's 7-day weather forecast
Written by:
September 8, 2025
ESOlex // Shutterstock
St. John's 7-day weather forecast
Stacker created the forecast for St. John's, Newfoundland and Labrador using data from OpenWeather. This week's high is 20 °C on Friday, while the low is 7 °C on Sunday. There is expected to be 1 sunny day and rain on 6 days this week.
There are currently no weather alerts.
Monday, September 15
- High of 16 °C, low of 10 °C (67% humidity)- Sunny with a 53% chance of rain (2 mm of rain)
- Moderate risk of harm from sun exposure (4 UV index)
- Light breeze (18 km/h wind)
- Sunrise at 6:38 AM, sunset at 7:13 PM

1 / 6
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Tuesday, September 16
- High of 14 °C, low of 9 °C (80% humidity)
- Overcast with a 58% chance of rain (1 mm of rain)
- Moderate risk of harm from sun exposure (4 UV index)
- Light breeze (23 km/h wind)
- Sunrise at 6:39 AM, sunset at 7:11 PM
- Overcast with a 58% chance of rain (1 mm of rain)
- Moderate risk of harm from sun exposure (4 UV index)
- Light breeze (23 km/h wind)
- Sunrise at 6:39 AM, sunset at 7:11 PM

2 / 6
Jaromir Chalabala // Shutterstock
Wednesday, September 17
- High of 14 °C, low of 8 °C (81% humidity)
- Overcast with a 60% chance of rain (1 mm of rain)
- Moderate risk of harm from sun exposure (2 UV index)
- Light breeze (19 km/h wind)
- Sunrise at 6:41 AM, sunset at 7:09 PM
- Overcast with a 60% chance of rain (1 mm of rain)
- Moderate risk of harm from sun exposure (2 UV index)
- Light breeze (19 km/h wind)
- Sunrise at 6:41 AM, sunset at 7:09 PM

3 / 6
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Thursday, September 18
- High of 18 °C, low of 11 °C (76% humidity)
- Mostly cloudy with a 24% chance of rain (0 mm of rain)
- Moderate risk of harm from sun exposure (5 UV index)
- Light breeze (20 km/h wind)
- Sunrise at 6:42 AM, sunset at 7:07 PM
- Mostly cloudy with a 24% chance of rain (0 mm of rain)
- Moderate risk of harm from sun exposure (5 UV index)
- Light breeze (20 km/h wind)
- Sunrise at 6:42 AM, sunset at 7:07 PM

4 / 6
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Friday, September 19
- High of 20 °C, low of 14 °C (73% humidity)
- Partly sunny with a 0% chance of snow
- Gentle breeze (31 km/h wind)
- Sunrise at 6:43 AM, sunset at 7:05 PM
- Partly sunny with a 0% chance of snow
- Gentle breeze (31 km/h wind)
- Sunrise at 6:43 AM, sunset at 7:05 PM

5 / 6
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Saturday, September 20
- High of 15 °C, low of 8 °C (94% humidity)
- Overcast with a 100% chance of rain (37 mm of rain)
- Gentle breeze (33 km/h wind)
- Sunrise at 6:45 AM, sunset at 7:03 PM
- Overcast with a 100% chance of rain (37 mm of rain)
- Gentle breeze (33 km/h wind)
- Sunrise at 6:45 AM, sunset at 7:03 PM

6 / 6
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Sunday, September 21
- High of 13 °C, low of 7 °C (56% humidity)
- Overcast with a 93% chance of rain (1 mm of rain)
- Gentle breeze (45 km/h wind)
- Sunrise at 6:46 AM, sunset at 7:01 PM
- New moon
- Overcast with a 93% chance of rain (1 mm of rain)
- Gentle breeze (45 km/h wind)
- Sunrise at 6:46 AM, sunset at 7:01 PM
- New moon