• Today

    Apr 20

    77°Lo 54°

    Partly sunny

    Low indoor dust & dander levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      50 - Moderate
    more
  • Mon

    Apr 21

    75°Lo 46°

    Couple of showers, t-storms

    Low indoor dust & dander levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      50 - Moderate
  • Tue

    Apr 22

    62°Lo 39°

    Cooler with clouds breaking

    Low indoor dust & dander levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      50 - Moderate
    more
  • Wed

    Apr 23

    62°Lo 44°

    Partly sunny

    Low indoor dust & dander levels
    • Precip
      25%
    • Wind
      Speed
      6 mph
    • Cloud
      Cover
      33%
    more
  • Thu

    Apr 24

    69°Lo 51°

    A strong thunderstorm

    Low indoor dust & dander levels
    • Precip
      55%
    • Wind
      Speed
      12 mph
    • Cloud
      Cover
      94%
    more
Next Previous
Hi 75° RealFeel® 72° Precipitation 60%

Day

N

E

S

W

  • WSW 12 mph
  • Gusts: 23 mph

Mostly cloudy, breezy and more humid with a couple of showers and a thunderstorm, mainly later

  • Max UV Index: 4 (Moderate)
  • Thunderstorms: 40%
  • Precipitation: 0.11 in
  • Rain: 0.11 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 2 hrs
  • Hours of Rain: 2 hrs
Lo 46° RealFeel® 35° Precipitation 60%

Night

N

E

S

W

  • NW 13 mph
  • Gusts: 23 mph

A couple of evening showers and a thunderstorm; otherwise, partly cloudy and breezy

  • Max UV Index: N/A
  • Thunderstorms: 40%
  • Precipitation: 0.1 in
  • Rain: 0.1 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 1 hrs
  • Hours of Rain: 1 hrs

Ottawa Pollen Levels - April 21

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

    Pollen

    Low

  • Weed

    Pollen

    Low

  • Tree

    Pollen

    Moderate

  • Mold

    Pollen

    Low

Temperature History - Apr 21

more Historical Weather Data >
  Today Normal Record 4/21/2013
High 75° 65° 88° (1987) 58°
Low 46° 42° 25° (1904) 35°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:07 AM with 13:35 of sunlight, then sets at 7:42 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 1:13 AM with 10:19 of moolight, then sets at 11:32 AM

Top Story

Ottawa Weather Report

Warm Easter Day in Chicago but Rain Coming on Monday

April 20, 2014; 3:12 AM ET

It will be a partly sunny and warm Easter day across Chicago. more >

Is it a Cold or the Flu?

Apr 19, 2014; 5:00 AM ET Symptoms caused by the common cold can often resemble those associated with the influenza virus, so how do you differentiate between the two?

Mon. Pollen

Mon. Dust & Dander

Mon. Wind Maps