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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Toronto Post Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
The live forecast above shows current temperatures in the low teens with overcast skies, typical for an Ottawa autumn day. Highs today peak near 15°C under light northerly winds, and a chance of drizzle persists through the afternoon.
What will the weather be like tomorrow?
Tomorrow brings a slight warm-up: highs in the upper teens under partly sunny skies, according to the live forecast. A weak cold front arrives by evening, introducing a 40% chance of showers overnight. Winds remain light from the southwest at 10–15 km/h.
How does the UV index and air quality look?
UV index is low (2), so no special protection is needed for most outdoor activities. Air quality is rated as moderate, with fine particulate levels near the seasonal average. Sensitive individuals may want to limit prolonged exertion outdoors.
Will the rain affect my commute this evening?
Light drizzle is likely during the late afternoon and early evening, reducing visibility slightly and making roads damp. Carry an umbrella if you’re heading out between 4 and 7 PM; the rain is expected to taper off after dinner.
What is the weekend outlook for Ottawa?
Saturday looks partly cloudy with highs near 17°C, while Sunday sees a stronger system bringing steady rain and cooler temperatures around 12°C. Sunday afternoon winds may gust to 30 km/h from the northeast.
Is frost expected tonight?
No. Overnight lows are forecast to stay near 6°C, well above freezing. Gardeners and farmers do not need to worry about frost damage, though a light jacket is advisable for any late evening walks.
Sources
For a broader look at conditions across the country, visit the Canada weather hub or check the latest Ottawa-specific page for updates.