Is Ottawa hot in May?
Days are typically mild at 19.6°C, while nights average 8.3°C.
Canada · 1991–2020 normal
Ottawa in
May.
Typical May weather in Ottawa: 19.6°C by day, 8.3°C at night, 80 mm of rain over 10.4 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high19.6°C
Typical low8.3°C
Rain80 mm
Wet days10.4
In the year-round weather comparison, May scores 60 out of 100 (June leads the year at 81). Daylight is calculated as 14 h 52 from latitude 45.41°.
May at a glance
What is Ottawa like in May?
Plain answers from the measured climate record—not a forecast or a promise about a particular trip.
Does it rain much?
The measured monthly average is 80 mm across about 10 wet days.
How much daylight is there?
There are about 14 h 52 between sunrise and sunset at mid-month, calculated from the place latitude.
Is May a good time to visit?
May ranks 5 of 12 in our weather comparison; June ranks first.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 6094817
- NOAA station
- CA006105976 · OTTAWA CDA
- Station distance
- 3.4 km from the place centre
- Coverage
- Strong coverage · 29 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.
Next step
Choose your month.
Then plan the details.
The weather comparison for Ottawa is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
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