Ottawa Weather in June
June Climate Overview
June is Ottawa's wettest month but also one of its most vibrant. Thunderstorms become common in the afternoons. The Ottawa Jazz Festival and Dragon Boat Festival headline a packed events calendar. Swimming season begins.
Source: Environment Canada Climate Normals 1991–2020 (Ottawa City station)
What to Expect
- Wettest month — thunderstorms common, especially late afternoon
- Warm and pleasant; good swimming weather by late June
- Longest days of the year (summer solstice June 20/21)
- Ottawa River at higher levels from snowmelt and rain
Things to Do in June
- Ottawa Jazz Festival (mid-to-late June, Confederation Park)
- Tim Hortons Ottawa Dragon Boat Festival (June 19–21, 2026, Mooney's Bay)
- Swimming at city beaches (Mooney's Bay, Petrie Island) — opens mid-June
- Whitewater rafting on the Ottawa River
- Rideau Canal boating season (lockstations open)
- Capital Pride events throughout June
What to Wear
Weather Tips for Visitors
- !Thunderstorms can be sudden and heavy — monitor Environment Canada radar
- !UV index routinely reaches 6-8 (high to very high) — sunscreen required
- !Ottawa River and lakes are still cold in early June for swimming
Seasonal Highlights
- Ottawa Jazz Festival: free and ticketed shows citywide
- Dragon Boat Festival at Mooney's Bay: races, music, food
- National Indigenous Peoples Day (June 21)
- Summer Solstice: ~15.5 hours of daylight
June in Ottawa — FAQ
What is the weather like in Ottawa in June?
June in Ottawa has an average high of 24.2°C and low of 13.3°C. June is Ottawa's wettest month but also one of its most vibrant. Thunderstorms become common in the afternoons. The Ottawa Jazz Festival and Dragon Boat Festival headline a packed events calendar. Swimming season begins.
What should I wear in Ottawa in June?
For June in Ottawa (24.2°C avg high), pack: Light summer clothing (T-shirts, shorts), Rain jacket or packable umbrella, Sunscreen and sunglasses, Light layers for evenings, Insect repellent (mosquitoes emerge after rains). Thunderstorms can be sudden and heavy — monitor Environment Canada radar
Is June a good time to visit Ottawa?
June is mild in Ottawa with 258 hours of sunshine. Top activities include: Ottawa Jazz Festival (mid-to-late June, Confederation Park); Tim Hortons Ottawa Dragon Boat Festival (June 19–21, 2026, Mooney's Bay); Swimming at city beaches (Mooney's Bay, Petrie Island) — opens mid-June.
Does it snow in Ottawa in June?
No, Ottawa does not typically receive snow in June. Monthly precipitation averages 95 mm, falling as rain.
What events happen in Ottawa in June?
Key events in June: Ottawa Jazz Festival: free and ticketed shows citywide. Dragon Boat Festival at Mooney's Bay: races, music, food. National Indigenous Peoples Day (June 21). Summer Solstice: ~15.5 hours of daylight. Jazz Festival & Dragon Boat Festival.
