Best year time to visit Ottawa

General weather information about Ottawa

Average annual temperature is 12.0 °C

Absolute maximum temperature: 37.3 °C

Absolute minimum temperature: -22.4 °C

Number of sunny days: 213 days

Number of rainy days: 132 days

Number of snow days: 20 days

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* Weather data for Ottawa United States is based on climate observations for 2026 year

Ottawa air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)12.314.422.727.331.232.735.537.334.932.319.614.7
Average daytime temperature (°C)1.25.68.618.025.228.829.229.127.218.711.27.2
Average temperature (°C)-2.9-0.82.610.918.723.023.824.021.213.75.83.0
Average night temperature (°C)-5.9-5.5-1.75.412.517.418.819.616.09.41.4-0.3
Absolute minimum temperature (°C)-20.7-22.4-12.5-4.32.19.713.413.810.1-3.8-10.8-6.1

Ottawa monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.015.015.014.013.011.010.09.0
Daylight mean duration (h)9.610.611.913.314.515.114.813.812.511.19.99.3
Daylight minimum duration (h)9.010.011.012.013.014.014.013.011.010.09.09.0
Sunshine mean duration (h)4.87.37.29.611.612.412.211.510.67.77.14.7
Precipitation (mm)4754514934531639429561250
Sunny days171716182117151617182318
Rainy days771311101316151312510
Snow days742100000123

Ottawa - weather forecast by months

Ottawa weather in januaryOttawa weather in februaryOttawa weather in marchOttawa weather in aprilOttawa weather in mayOttawa weather in juneOttawa weather in julyOttawa weather in augustOttawa weather in septemberOttawa weather in octoberOttawa weather in novemberOttawa weather in december

Best time to visit Ottawa:

The best time to visit Ottawa during the most sunny months:

  • May — 11.6(h)
  • June — 12.4(h)
  • July — 12.2(h)
  • August — 11.5(h)

The largest precipitation sum in Ottawa is at

  • July — 163(mm)
  • August — 94(mm)

    • Weather forecast in the closest to Ottawa admin centers

    Weather forecast in the closest towns to Ottawa

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    Frequently asked questions

    When is the best time to visit Ottawa?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Ottawa.
    What is the weather like in Ottawa?
    See average temperature, rainfall and daylight hours for Ottawa by month in the table above.
    How many sunny days does Ottawa have?
    The monthly weather statistics above show sunshine and rainfall patterns for Ottawa throughout the year.