Clouds, rain on the forecast for Race Weekend

A cloudy spring day in Ottawa. May 3, 2026. (CTV News)

It’s the Tamarack Ottawa Race Weekend and the forecast calls for mild temperatures and a mix of clouds and rain.

On Saturday, as racers line up for the Ottawa Kids Marathon, 5K and 10K events, expect a mainly cloudy day with a temperature high of 19 C.

Rain is expected to begin around midnight, and the temperature will lower to 9 C.

• Hourly and 7-day forecast on our CTVNewsOttawa.ca weather hub

On Sunday, the day of the marathon and half marathon, expect periods of rain and a high of 13 C.

On Monday, expect 21 C and a 40 per cent chance of showers.

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