Ottawa weather on May 4, 2026, is set to start with rain showers, about 8°C and gusts up to 44 km/h before conditions ease later in the day. Morning rain carries a 40% chance, so commuters and anyone heading out early will face the wettest stretch first.
Temperatures rise steadily from 6°C early in the morning to 17°C by early afternoon, then reach 19°C in the afternoon. The rain chance drops to 30% later in the day, while the evening stays cloudy with temperatures near 17°C and a 20% rain chance.
Morning Showers in Ottawa
The early hours bring the most unsettled part of the forecast. A wind speed that starts around 14 km/h and builds toward 23 km/h comes with the stronger gusts, making a windbreaker useful along with an umbrella or rain jacket.
That combination leaves the morning commute as the most weather-sensitive part of the day. The rain risk is highest then, and the cooler start means outdoor plans in the first half of the day may need a quick adjustment.
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Afternoon Clouds Over Ottawa
By early afternoon, Ottawa turns milder, with temperatures climbing to 17°C and then 19°C in the afternoon. The sky is expected to stay cloudy, but the rain chance eases as the day goes on.
Light layers fit the warmer stretch better than the morning clothes. The forecast shift from wet and windy to cloudy and mild gives people a wider window for errands, outdoor work, and evening plans without the same early-day rain risk.
Evening Weather in Ottawa
The evening remains cloudy, with temperatures slipping back to 17°C and wind gusts easing to 37 km/h. The rain chance falls to 20%, which keeps the later hours drier than the morning.
For anyone planning to be outside after sunset, the day ends calmer than it begins. The main change is simple: wait for the afternoon if you can, and keep rain gear handy if you have to leave earlier.
