Ottawa 7-day weather forecast

Written by:
September 8, 2025
ESOlex // Shutterstock

Ottawa 7-day weather forecast

Stacker created the forecast for Ottawa, Ontario using data from OpenWeather. This week's high is 26 °C on Wednesday, while the low is 7 °C on Tuesday. There are expected to be 4 sunny days and rain on 2 days this week.

There are currently no weather alerts.

Monday, September 8

- High of 24 °C, low of 8 °C (41% humidity)
- Sunny with a 0% chance of snow
- High risk of harm from sun exposure (5 UV index)
- Light breeze (13 km/h wind)
- Sunrise at 6:33 AM, sunset at 7:27 PM
1 / 6
afoto6267 // Shutterstock

Tuesday, September 9

- High of 23 °C, low of 7 °C (40% humidity)
- 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 6:34 AM, sunset at 7:26 PM
2 / 6
Onishchenko Natalya // Shutterstock

Wednesday, September 10

- High of 26 °C, low of 8 °C (43% humidity)
- Partly cloudy with a 0% chance of snow
- Moderate risk of harm from sun exposure (4 UV index)
- Light air (9 km/h wind)
- Sunrise at 6:35 AM, sunset at 7:24 PM
3 / 6
LeManna // Shutterstock

Thursday, September 11

- High of 23 °C, low of 11 °C (55% humidity)
- Sunny with a 0% chance of snow
- High risk of harm from sun exposure (5 UV index)
- Light breeze (19 km/h wind)
- Sunrise at 6:36 AM, sunset at 7:22 PM
4 / 6
Leonid Ikan // Shutterstock

Friday, September 12

- High of 20 °C, low of 7 °C (40% humidity)
- Sunny with a 0% chance of snow
- Light air (10 km/h wind)
- Sunrise at 6:37 AM, sunset at 7:20 PM
5 / 6
Jurga Jot // Shutterstock

Saturday, September 13

- High of 22 °C, low of 7 °C (43% humidity)
- Overcast with a 96% chance of rain (1 mm of rain)
- Light breeze (14 km/h wind)
- Sunrise at 6:39 AM, sunset at 7:18 PM
6 / 6
Jaromir Chalabala // Shutterstock

Sunday, September 14

- High of 17 °C, low of 12 °C (80% humidity)
- Overcast with a 100% chance of rain (4 mm of rain)
- Light breeze (14 km/h wind)
- Sunrise at 6:40 AM, sunset at 7:16 PM
- Last quarter moon

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