• Some clouds 50°
    Hair Frizz Current Weather
    • Relative Humidity
      41%
    • Wind
      Speed
      10 mph
    • Dew
      Point
      27°
  • Tonight

    Apr 19

    Lo 43°

    Mostly cloudy

    Hair Frizz Weather
    • Wind
      Gust
      14 mph
    • Precip
      6%
    • Hours of Precip
      0
    Day Details >
  • Tomorrow

    Apr 20

    Hi 60°

    Becoming windier; a.m. rain

    Watch for hair frizz
    • Wind
      Gust
      30 mph
    • Precip
      76%
    • Hours of Precip
      10.5
    Day Details >
  • Tuesday

    Apr 21

    Hi 56°

    A passing shower or two

    Watch for hair frizz
    • Wind
      Gust
      27 mph
    • Precip
      55%
    • Hours of Precip
      1.5
    Day Details >
Next

Expect rainy weather tomorrow morning through Tuesday afternoon

4/19 4/20 Now: 8:13pm
PM 8-12
  • 8pm Intermittent clouds 50° 0%
  • 9pm Intermittent clouds 49° 0%
  • 10pm Partly cloudy 49° 0%
  • 11pm Partly cloudy 48° 0%
  • 12am Intermittent clouds 48° 0%
AM 7-12
  • 7am Cloudy 43° 10%
  • 8am Rain 43° 67%
  • 9am Rain 45° 67%
  • 10am Cloudy 47° 49%
  • 11am Cloudy 48° 49%
  • 12pm Rain 49° 60%
PM 1-6
  • 1pm Rain 53° 60%
  • 2pm Cloudy 55° 47%
  • 3pm Showers 57° 55%
  • 4pm Showers 58° 55%
  • 5pm Cloudy 59° 40%
  • 6pm Cloudy 60° 34%
Hourly Forecast >
Apr 19, 2015; 6:08 PM ET
Five-day Weather Forecast for Ottawa, ON
Ottawa, ON Weather Forecast

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The History Behind the UV Index

Nov 12, 2012; 5:00 AM ET The UV index has been around since the early 1990s. It was created to help you plan outdoor activities in hopes to limit overexposure to the sun. Jeannette Calle has more.

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