, °F

Personalized Forecasts

Featured Forecast

My Favorite Forecasts

    My Recent Locations

    • Today

      Sep 25

      85° /54°F
      A heavy afternoon t-storm
      • Ragweed Pollen
        • Ragweed Pollen
        • Grass Pollen
        • Tree Pollen
        • Mold
        • Dust & Dander
        • Air Quality Index
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
    • Mon

      Sep 26

      67° /44°
      Mostly sunny and cooler
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
      More
    • Tue

      Sep 27

      66° /46°
      Partly sunny, breezy and cool
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
      More
    • Wed

      Sep 28

      64° /49°
      Clouds and sun with a shower
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
      More
    • Thu

      Sep 29

      71° /49°
      Mostly sunny and beautiful
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    68°/62° RealFeel® 67°/59°
    A shower or thunderstorm
    • 9 mph
    • Precipitation: 55%
    • Rain: 0.06 in
    • Snow: 0 in
    • Humidity: 86%
    • Cloud Cover: 98%
    • Dew Point: 61° F
    • Visibility: 9 mi

    Temperature History

    more Historical Weather Data >
      Today Normal Record 9/25/2015
    High 85° 73° 92° (1908) 83°
    Low 54° 50° 29° (1942) 55°

    Sunrise/Sunset

    • Sunrise: 6:47 AM
    • Sunset: 6:46 PM
    • Duration: 11:59 hr

    Moonrise/Moonset

    • Moonrise: 1:24 AM
    • Moonset: 3:55 PM
    • Duration: 14:31 hr
    Astronomy

    Ottawa Weather Report

    Chilly winds to howl across Great Lakes early this week

    September 25, 2016; 1:13 PM ET

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

    Sun. Pollen

    Sun. Dust & Dander

    Sun. Wind Maps