Measurements:
°C
°F
Ottawa
104°F
SE 3 mph
Feels like: 114°F
Precip: 1%
World Resorts USA Ottawa Weather May Weather in Ottawa

Ottawa Weather: May

Average Day Temperature: 71.7°F
Average Night Temperature: 55.1°F
Number of Sunny Days: 12 days
Sunshine Hours: 14.0 - 14.9 hours
Number of Rainy Days: 3 days
Precipitation Totals: 1.5 in

Air Temperature in May, °F

Select Year: 2026 2025 2024

The highest day temperature in May 2026 was 95°F. The lowest night temperature was 34°F. The average values for day and night temperatures during May were 76.7°F и 53.6°F respectivly.

Sunny, Cloudy and Gloomy days

You can expect various weather conditions during May. Be ready for sunny, cloudy or even gloomy days.

Precipitation Totals in May, in

Precipitation total in May for Ottawa is 1.5 in. It makes may the most rainy month of the year.

Wind Speed in May, mph

The average wind speed in May is 9.4 mph.

Average Sunny Hours Per Day

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Ottawa in May is 8.1 hours.

Best Time to Visit Ottawa
The most sunny months:
September 19 days
October 16 days
August 15 days
The most warm months:
August 85.1 °F
July 84.7 °F
June 83.0 °F
The most cold months:
January 26.5 °F
February 32.8 °F
December 35.5 °F
The most rainy months:
June 3 days
March 3 days
May 3 days
The most windy months:
March 11 mph
April 11 mph
November 10 mph

Ottawa on the Weather Map

USA Resorts:
NAME
Boston +92
Chicago +86
Hawaii +80
Houston +80
Las Vegas +120
Los Angeles +106
Maui +76
Miami +96
Myrtle Beach +96
New York +110
San Diego +96
San Francisco +76
Santa Monica +84
Sarasota +102
Tampa +100
24 Hours Weather Forecast
Ottawa
Local time: 14:56
15 jul, wednesday
1500 104°F
SE
3 mph
1800 100°F
E
3 mph
2100 88°F
SE
2 mph
16 jul, thursday
0000 82°F
S
2 mph
0300 76°F
SW
3 mph
0600 74°F
SW
3 mph
0900 82°F
SW
2 mph
1200 88°F
W
5 mph