Weather in Ottawa: May
 |
Average day temperature: | 69.5°F |
| Average night temperature: | 54.6°F | |
 |
Number of sunny days: | 12 days |
| Day length: | 14.0 - 14.9 hours | |
 |
Number of rainy days: | 3 days |
| Precipitation totals: | 1.5 in. | |
| more information | ||
14 days
forecast
forecast
| Ottawa |
weather in
June
June
| Ottawa |
Air temperature in May, °F
Show year:
2026
2025
2024
The highest day temperature during May of 2026 was 90°F. At the same time the lowest night temperature was 35°F. Daily and nightly averages during May were 74.0°F and 53.3°F.
Sunny, partly cloudy and cloudy days
Number of sunny, partly cloudy and cloudy days in May is almost equal.
Precipitation total in May, in.
Precipitation total value in Ottawa in May is 1.5 in. Other months of the year show relatively similar values.
Wind speed in May, mph
The average wind speed value in May is 9.4 mph
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in May is: 8.4.
Best time for vacation in Ottawa
Ottawa on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Ottawa
Local time: 03:14
June 29, monday
0600
73°F
N
8 mph
8 mph
0900
84°F
N
12 mph
12 mph
1200
86°F
N
15 mph
15 mph
1500
88°F
N
15 mph
15 mph
1800
86°F
N
14 mph
14 mph
2100
79°F
N
10 mph
10 mph
June 30, tuesday
0000
77°F
N
9 mph
9 mph
0300
73°F
N
9 mph
9 mph
