• Today

    Mar 4

    20°Lo 2°

    Some sun, breezy and colder

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      0 - Low
  • Thu

    Mar 5

    13°Lo 1°

    Sunny, but frigid

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      0 - Low
    more
  • Fri

    Mar 6

    28°Lo 24°

    Sunny and breezy

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      0 - Low
    more
  • Sat

    Mar 7

    40°Lo 23°

    Chilly with clouds and sun

    Low ragweed pollen levels
    • Precip
      4%
    • Wind
      Speed
      13 mph
    • Cloud
      Cover
      46%
    more
  • Sun

    Mar 8

    41°Lo 25°

    Chilly with clouds and sun

    Ragweed Pollen Weather
    • Precip
      9%
    • Wind
      Speed
      10 mph
    • Cloud
      Cover
      68%
    more
Next Previous
Hi 20° RealFeel® 8° Precipitation 8%

Day

N

E

S

W

  • NW 13 mph
  • Gusts: 25 mph

Breezy and colder with intervals of clouds and sunshine

  • Max UV Index: 4 (Moderate)
  • Thunderstorms: 0%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 2° RealFeel® -13° Precipitation 0%

Night

N

E

S

W

  • NW 12 mph
  • Gusts: 20 mph

Clear and bitterly cold; extreme cold can be dangerous for outdoor activities late

  • Max UV Index: N/A
  • Thunderstorms: 0%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Ottawa Pollen Levels - March 4

  • Extreme
  • Very High
  • High
  • Moderate
  • Low
  • Grass

    Pollen

    Low

  • Weed

    Pollen

    Low

  • Tree

    Pollen

    Low

  • Mold

    Pollen

    Low

Temperature History - Mar 4

more Historical Weather Data >
  Today Normal Record 3/4/2014
High 20° 43° 72° (1983) 29°
Low 25° -2° (2002) 14°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:26 AM with 11:23 of sunlight, then sets at 5:49 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 5:08 PM with 13:01 of moolight, then sets at 6:09 AM

Ottawa Weather Report

Chicago: Bitter Cold to Depart by the Weekend

March 4, 2015; 2:53 PM ET

While frigid conditions will encompass the Chicago area over the next couple of days, the weekend will offer a break from the bitter cold. more >

Making a Forecast: The Sixth Sense

Feb 16, 2015; 5:00 AM ET What steps go into making a forecast?

Wed. Pollen

Wed. Dust & Dander

Wed. Wind Maps