Tomorrow's Weather Ottawa: Thunderstorms and Warm Temps

Tomorrow's forecast:

Morning Thunderstorms Bring Wet Start and Mild Temps

    Tomorrow morning in Ottawa kicks off with thunderstorms and a 70% chance of rain, bringing light showers and 1.6 mm of precipitation. Temperatures will hover around a mild 18°C with light winds gusting up to 27 km/h, making for a damp but not overly windy start compared to yesterday morning.

Activities Recommendations for the morning of Aug 27, 2026:

• Commute Dress in waterproof layers to stay dry during morning travel through scattered thunderstorms.

• Pet Walks Keep walks brief and close to home to avoid heavy rain and thunder activity.

• Running Opt for indoor workouts as outdoor conditions will be wet and stormy.

Temperatures will rise significantly from morning to afternoon, creating warm and humid conditions.

(Click above to view interactive map)

Afternoon Thunderstorms Peak with Warm, Humid Conditions

    The afternoon will see temperatures rise to a warm 23°C, feeling closer to 29°C due to humidity. Thunderstorms will intensify with a 90% chance of rain and 7 mm expected, accompanied by light winds increasing to gusts near 30 km/h. Outdoor activities may be interrupted by frequent showers and thunder.

Activities Recommendations for the afternoon of Aug 27, 2026:

• Outdoor Activities Plan indoor or sheltered activities as thunderstorms and rain will be at their peak.

• Commuting Allow extra travel time and carry rain gear to navigate wet roads safely.

• Hydration Stay hydrated despite the cooler rain as humidity will make it feel warmer.

Evening Storms Ease but Rain Continues with Cooler Temps

    Evening temperatures will cool to around 20°C with thunderstorms continuing at a 70% chance of rain and 3.3 mm expected. Winds will calm slightly with gusts up to 23 km/h. Clouds will begin to break up later, leading to partly cloudy skies overnight.

Activities Recommendations for the evening of Aug 27, 2026:

• Evening Walks Expect wet conditions; consider postponing or dressing in waterproof gear.

• Commuting Rain will persist, so drive cautiously and use headlights for visibility.

• Relaxation A cozy indoor evening is ideal as storms wind down but rain lingers.

Precipitation will increase through the day, with thunderstorms peaking in the afternoon and continuing into the evening.

(Click above to view detailed chart)

Packing preparations for tomorrow:

• Waterproof jacket or raincoat

• Compact umbrella

• Light, breathable clothing for warm temperatures

• Comfortable waterproof footwear

• Water bottle to stay hydrated

• Light layers for cooler evening temperatures

For active alerts in your area, visit your Alerts page. This article was generated with the use of OpenAI and The Weather Network's forecast data. The article was reviewed by the editorial team for accuracy and clarity. For more details visit our AI Code of Ethics. For feedback, visit our survey.