15-Day Weather Forecast - Ottawa
15-day weather forecast for Ottawa: temperatures from 4°C (39°F) to 24°C (75°F). Average daily high 18°C (64°F) over the next 15 days.
Hourly Forecast by Day
15-Day Temperature Trend
15-Day Weather Forecast
Updated just nowWeather Insight
Ottawa's 15-day outlook ranges from a low of 4°C to a high of 24°C, with an average daytime high near 18°C. That's 4° below the long-term average high of 22°C for this time of year. It continues a recent pattern — 7 of the last 28 days with published data have run cooler than normal. Air quality is currently good (AQI 50), with no notable outdoor health concerns.
Today vs Normal
The long-term average high for today is 22°C.
7 of the last 28 days with published data ran above normal.
It continues that pattern - today's forecast is also running below normal.
Red = above normal, blue = at or below · last 12 days
Air Quality
Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.
Extended Outlook for Ottawa
Over the next 15 days, Ottawa is forecast to see temperatures ranging from 3°C to 24°C, averaging a daily high of 18°C. The extended outlook indicates significant rainfall totalling 42.1 mm spread across 7 days. Conditions are suitable for most outdoor activities; carry an umbrella on days with showers.