Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
Ottawa Weather in May
With daytime temperatures of 23°C (73°F) and nighttime lows of 10°C (50°F), May in Ottawa brings high temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 113 mm (4.4 in) falls on average.
Rainfall in Ottawa in May
This month experiences about 14 days of rain according to historical data, averaging 113 mm (4.4 in). When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in Ottawa in May
In May, Ottawa gets high temperatures, with highs of 23°C (73°F). Nights cool to around 10°C (50°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. With overnight lows of 10°C (50°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.If you prefer enjoying temperate temperatures and rain-free days, July and September typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Ottawa Temperature in May
Min Temperature
10°C (50°F)
Max Temperature
23°C (73°F)
Chance of Rain
47%
Precipitation
113 mm (4.4 in)
Rainy days
14 days
Ottawa Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Ottawa - and find the best time to visit.
Best Places in the United States of America in May
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in May →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Ottawa in May
For Ottawa in May, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho.
What To Do in Ottawa in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling9/10 -
Walking9/10 -
Camping6/10 -
Outdoor sports9/10
Ottawa 3-Day Forecast
More climate data for Ottawa
See the full Ottawa climate overview or explore weather in the United States of America.
Popular in May
Where to go in May - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Yosemite National Park is definitely worth a visit
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