- Become a Green Motion loyalty member for FREE
- Save up to 25% on future car rentals + extra offers
- Discount varies by membership tier & number of rentals
Ottawa weather in May 2021
Get the latest coronavirus (COVID-19) updates for Canada with current travel advice, statistics and online resources.
- 1818°C max day temperature
- 1212 days with some rainfall
- 77°C min night temperature
- 1515 hours of daylight per day
- 0No heat & humidity
- 7373 mm of monthly rainfall
- 66 (High) UV index
Recommended for Ontario
The May weather guide for Ottawa, Ontario shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
How hot is it in Ottawa in May?
Daytime temperatures usually reach 18°C in Ottawa in May, falling to 7°C at night.
How sunny is it in Ottawa in May?
There are normally 7 hours of bright sunshine each day in Ottawa in May - that's 50% of daylight hours.
Does it rain in Ottawa in May?
There are usually 12 days with some rain in Ottawa in May and the average monthly rainfall is 73mm.
Metric (°C / mm) | Imperial (°F / inches)
Discover more about Canada
Ottawa sunrise & sunset times for May 2021
Browse the sunrise & sunset times for Ottawa in May 2021. Select a month to view Ottawa sunrise & sunset times for the next twelve months.
|Date||Sunrise times||Sunset times|
|Saturday, 1st May 2021||05:51||20:10|
|Sunday, 16th May 2021||05:31||20:28|
|Monday, 31st May 2021||05:18||20:43|
- Save on last minute on holidays with Travelsphere
- Book tours to Africa, Asia, Europe, America & Oceania
- Check out holidays departing in the next few months
Where is hot in Ontario in May for 2021/2022?
Below are average maximum temperatures at popular destinations in Ontario in May. Select a destination to see more weather parameters.
Get your weekly fix of holiday inspiration from some of the world's best travel writers plus save on your next trip with the latest exclusive offers
We promise not to share your details
Popular travel offers
*affiliate links: find out how we are funded and why this helps us remain free to use.