Ottawa weather live forecast

Today's maximum temperature in Ottawa is expected to be 73°F. Select a day from the live weather forecast for Ottawa, Ontario, Canada for more weather parameters.

5-day weather forecast updated at 04:00 on Sunday 17th August 2025 GMT

More about Ottawa

Ottawa by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Ontario

Hostelworld: Top deals on accommodation

  • Explore cheap accommodation around the world
  • Choose from over 36,000 properties across the globe
  • Get instant confirmation & 24/7 customer service
Go to Hostelworld deal >>

View all Hostelworld offers

The 5-day weather forecast for Ontario (Ottawa) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Ottawa weather forecast by day

Below are the detailed weather forecasts for Ottawa for the next 5 days.

Ottawa weather for Sunday 17th August 2025

Expect mostly cloudy with rain in Ottawa, Ontario with a maximum temperature of 73°F, maximum UV of 5 (Moderate) and 4 hours of bright sunshine. There are 5-10 mm of rainfall expected with 81% chance of some rain and a gentle breeze of 12 mph from the north.

  • 73°F maximum temperature73
    °F maximum temperature
  • 57°F minimum temperature57
    °F minimum temperature
  • Mostly cloudy with rain
    mostly cloudy with rain
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 81% chance of some rain81
    % chance of some rain
  • 5-10 mm of rainfall expected<10
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Gentle breeze of 12 mph from the North12
    mph wind from N

Back to top

Ottawa weather for Monday 18th August 2025

Expect scattered clouds in Ottawa, Ontario with a maximum temperature of 70°F, maximum UV of 7 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 8 mph from the north-east.

  • 70°F maximum temperature70
    °F maximum temperature
  • 52°F minimum temperature52
    °F minimum temperature
  • Scattered clouds
    scattered clouds
  • 12 hours of bright sunshine12
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Gentle breeze of 8 mph from the North-East8
    mph wind from NE

Back to top

Ottawa weather for Tuesday 19th August 2025

Expect overcast skies in Ottawa, Ontario with a maximum temperature of 70°F, maximum UV of 5 (Moderate) and no hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 8 mph from the east.

  • 70°F maximum temperature70
    °F maximum temperature
  • 55°F minimum temperature55
    °F minimum temperature
  • Overcast skies
    overcast skies
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Gentle breeze of 8 mph from the East8
    mph wind from E

Back to top

Ottawa weather for Wednesday 20th August 2025

Expect overcast skies in Ottawa, Ontario with a maximum temperature of 72°F, maximum UV of 3 (Moderate) and no hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 mph from the east.

  • 72°F maximum temperature72
    °F maximum temperature
  • 61°F minimum temperature61
    °F minimum temperature
  • Overcast skies
    overcast skies
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 7 mph from the East7
    mph wind from E

Back to top

Ottawa weather for Thursday 21st August 2025

Expect broken clouds in Ottawa, Ontario with a maximum temperature of 81°F, low levels of heat & humidity, maximum UV of 7 (High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 mph from the north-east.

  • 81°F maximum temperature81
    °F maximum temperature
  • 57°F minimum temperature57
    °F minimum temperature
  • Broken clouds
    broken clouds
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Light breeze of 7 mph from the North-East7
    mph wind from NE

Back to top

Marriott discount code: up to 20% off hotel stays

  • Save up to 20% when you book long stays with Marriott
  • 20% off - 4-6 nights, 15% off 3 nights
  • Book hotels in Europe, the Middle East & Africa
Show discount codeShow discount code ******UK8
Redeem Marriott discount code >>

View all Marriott offers

Metric (°C)  |  Imperial (°F)

Back to top

More about Ontario

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^