Ottawa Weather in August

August weather in Ottawa

August feels properly summery: warm afternoons, mild evenings and plenty of daylight for exploring. It's also humid, with rain on many days, so a sunny stretch can turn sticky and a shower can interrupt an outdoor plan. Check out the Canadian Museum of History or the National Gallery when the weather turns; both are easy to pair with a walk around downtown.

You can still enjoy the Rideau Canal, bike paths and outdoor patios. If you're hiking in Gatineau Park, rain can make trails muddy, so choose a shorter route if the ground is wet. Skip long, exposed walks in the stickiest afternoon heat.

Events and crowds

Capital Pride brings parades and events to Ottawa in late summer, often around August. Across the river, Gatineau's Hot Air Balloon Festival is another well-known late-August event. Dates vary, so check the calendar for your visit.

If you hate crowds, August may not be your favourite month: it's a popular time for family trips, and central sights can feel busy. It's generally a pricier period for stays than quieter shoulder-season months such as May and September. September can also feel cooler, but it's a good alternative if you want fewer summer visitors.

A local tip

Travelling with kids? Make the Canadian Museum of History your rainy-day anchor, then cross the Alexandra Bridge for a view back toward Parliament Hill. The walk links two major sights without needing a car, and you can duck inside if a shower rolls through. Check the museum's hours before setting out, especially if you're planning around an event.