Ottawa weather live forecast

Today's maximum temperature in Ottawa is expected to be 26°C. 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 Tuesday 16th September 2025 GMT

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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 Tuesday 16th September 2025

Expect clear skies in Ottawa, Ontario with a maximum temperature of 26°C, maximum UV of 6 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 kph from the east.

  • 26°C maximum temperature26
    °C maximum temperature
  • 12°C minimum temperature12
    °C minimum temperature
  • Clear skies
    clear skies
  • 12 hours of bright sunshine12
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 26°C wind chill26
    °C wind chill
  • Light breeze of 7 kph from the East7
    kph wind from E

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Ottawa weather for Wednesday 17th September 2025

Expect scattered clouds in Ottawa, Ontario with a maximum temperature of 25°C, maximum UV of 5 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 kph from the south-west.

  • 25°C maximum temperature25
    °C maximum temperature
  • 13°C minimum temperature13
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 9 hours of bright sunshine9
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 25°C wind chill25
    °C wind chill
  • Light breeze of 7 kph from the South-West7
    kph wind from SW

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Ottawa weather for Thursday 18th September 2025

Expect sunshine and showers in Ottawa, Ontario with a maximum temperature of 26°C, maximum UV of 5 (Moderate) and 7 hours of bright sunshine. There are 0-2 mm of rainfall expected with 19% chance of some rain and a gentle breeze of 14 kph from the north-west.

  • 26°C maximum temperature26
    °C maximum temperature
  • 14°C minimum temperature14
    °C minimum temperature
  • Sunshine and showers
    sunshine and showers
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 19% chance of some rain19
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 26°C wind chill26
    °C wind chill
  • Gentle breeze of 14 kph from the North-West14
    kph wind from NW

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Ottawa weather for Friday 19th September 2025

Expect scattered clouds in Ottawa, Ontario with a maximum temperature of 19°C, maximum UV of 5 (Moderate) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the north.

  • 19°C maximum temperature19
    °C maximum temperature
  • 9°C minimum temperature9
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 12 hours of bright sunshine12
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 19°C wind chill19
    °C wind chill
  • Gentle breeze of 16 kph from the North16
    kph wind from N

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Ottawa weather for Saturday 20th September 2025

Expect clear skies in Ottawa, Ontario with a maximum temperature of 19°C, maximum UV of 5 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the east.

  • 19°C maximum temperature19
    °C maximum temperature
  • 7°C minimum temperature7
    °C minimum temperature
  • Clear skies
    clear skies
  • 11 hours of bright sunshine11
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 19°C wind chill19
    °C wind chill
  • Light breeze of 9 kph from the East9
    kph wind from E

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Metric (°C / mm)  |  Imperial (°F / inches)

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