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    • Sun

      Oct 2

      69° /49°F
      Variable clouds
      • Ragweed Pollen
        • Ragweed Pollen
        • Grass Pollen
        • Tree Pollen
        • Mold
        • Dust & Dander
        • Air Quality Index
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
    • Mon

      Oct 3

      71° /49°
      Mainly cloudy
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    • Tue

      Oct 4

      72° /53°
      Periods of sun
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    • Wed

      Oct 5

      74° /52°
      Variable cloudiness
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    • Thu

      Oct 6

      71° /49°
      Cloudy with heavy showers
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More

    Day

    69°Hi RealFeel® 70° Precipitation 25%
    Variable clouds
    • NW 6 mph
    • Gusts: 8 mph
    • Max UV Index: 3 (Moderate)
    • Thunderstorms: 6%
    • Precipitation: 0 in
    • Rain: 0 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0 hrs
    • Hours of Rain: 0 hrs

    Night

    49°Lo RealFeel® 50° Precipitation 18%
    Partly cloudy
    • SSW 4 mph
    • Gusts: 6 mph
    • Max UV Index: N/A
    • Thunderstorms: 6%
    • Precipitation: 0 in
    • Rain: 0 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0 hrs
    • Hours of Rain: 0 hrs

    Temperature History

    more Historical Weather Data >
      Today Normal Record 10/2/2015
    High 69° 70° 91° (1971) 63°
    Low 49° 46° 26° (2003) 45°

    Sunrise/Sunset

    • Sunrise: 6:54 AM
    • Sunset: 6:34 PM
    • Duration: 11:40 hr

    Moonrise/Moonset

    • Moonrise: 8:18 AM
    • Moonset: 7:42 PM
    • Duration: 11:24 hr
    Astronomy

    Ottawa Weather Report

    Chilly winds to howl across Great Lakes early this week

    September 27, 2016; 11:53 AM ET

    Gusty winds will accompany a push of chilly air across the Great Lakes through Tuesday. More >