ClimateForecastMayJune >>

Climate in Ottawa (Ontario), Canada

The graphs below show the monthly weather averages over the year.

Average day and night temperature

The mean minimum and maximum temperatures over the year.

Monthly precipitation

The mean monthly precipitation over the year, including rain, snow, hail etc.

Forecast for Ottawa

Fri   May 17
24°C | 14°C
S 14 km/h
9.7 mm
broken clouds and  chance of rain

broken clouds and chance of rain

Sat   May 18
24°C | 14°C
SE 11 km/h
5.7 mm
partly cloudy and rain

partly cloudy and rain

Sun   May 19
26°C | 12°C
S 11 km/h
partly cloudy and no rain

partly cloudy and no rain

The best time of year to visit Ottawa in Canada

During the months of May, June and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:

  • When is winter in Ottawa?
    The coldest season / winter is in the following months: January, February and December.
  • Which is the warmest month in Ottawa?
    July has an average maximum temperature of 27°C and is the warmest month of the year.
  • Which is the coldest month in Ottawa?
    The coldest month is January with an average maximum temperature of -4°C.
  • Which is the wettest month in Ottawa?
    June tops the wettest month list with 105 mm of rainfall.
  • Which is the driest month in Ottawa?
    February is the driest month with 69 mm of precipitation.
  • Which is the sunniest month in Ottawa?
    July is the sunniest month with an average of 280 hours of sunshine.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.