• Friday

    Sep 26

    16°Lo 12°

    Clouds giving way to some sun

    Low indoor dust & dander levels
    • Precip
      0%
    • Wind
      Speed
      10 k/h
    • Cloud
      Cover
      76%
    more
  • Saturday

    Sep 27

    21°Lo 11°

    Sunshine and patchy clouds

    Low indoor dust & dander levels
    • Precip
      6%
    • Wind
      Speed
      11 k/h
    • Cloud
      Cover
      29%
    more
  • Sunday

    Sep 28

    23°Lo 11°

    Mostly cloudy, a shower; warm

    Low indoor dust & dander levels
    • Precip
      55%
    • Wind
      Speed
      13 k/h
    • Cloud
      Cover
      78%
    more
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Ottawa Weather Report

Cold Snap, Widespread Frost Looms for Northeast

September 18, 2014; 9:00 PM ET

The chilliest air of the season so far will settle over much of the Northeast into Friday and will bring frost to a large area. more >

Ottawa Weekend Weather Chat