• Saturday

    Aug 23

    24°Lo 16°

    Partly sunny and humid

    Moderate ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      30 - Moderate
    • Tree
      Pollen
      0 - Low
    more
  • Sunday

    Aug 24

    26°Lo 15°

    More clouds than sun

    Moderate ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      30 - Moderate
    • Tree
      Pollen
      0 - Low
    more
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Markham Weather Report

Heavy Rain to Soak Great Falls, Bismarck, Winnipeg

August 22, 2014; 9:13 PM ET

A swath of soaking rain will slowly shift from the northern Plains to the Canadian Prairies this weekend, making people reach for their umbrellas and heightening concerns for flooding. more >

Markham Weekend Weather Chat