• Today

    Aug 4

    82°Lo 58°

    Mostly sunny and beautiful

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      3 - Moderate
  • Wed

    Aug 5

    84°Lo 65°

    Mostly cloudy

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      3 - Moderate
    more
  • Thu

    Aug 6

    82°Lo 65°

    Mostly cloudy and humid

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      3 - Moderate
    more
  • Fri

    Aug 7

    83°Lo 65°

    Some sun, a t-storm; humid

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      3 - Moderate
    more
  • Sat

    Aug 8

    85°Lo 66°

    Mostly sunny and humid

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
Next Previous
Hi 82° RealFeel® 86° Precipitation 3%

Day

N

E

S

W

  • WNW 7 mph
  • Gusts: 10 mph

Mostly sunny and beautiful

  • Max UV Index: 7 (High)
  • Thunderstorms: 2%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 58° RealFeel® 59° Precipitation 3%

Night

N

E

S

W

  • WSW 2 mph
  • Gusts: 6 mph

Rather cloudy

  • Max UV Index: N/A
  • Thunderstorms: 1%
  • 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 - August 4

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

    Low

  • Ragweed Pollen

    Low

  • Tree Pollen

    Moderate

  • Mold Pollen

    Low

Temperature History - Aug 4

more Historical Weather Data >
  Today Normal Record 8/4/2014
High 82° 83° 103° (1947) 86°
Low 58° 64° 46° (1912) 66°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:53 AM with 14:16 of sunlight, then sets at 8:09 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 10:48 PM with 13:14 of moolight, then sets at 12:02 PM

Ottawa Weather Report

Chicago: Cooler Conditions to Last Through Week

August 4, 2015; 4:40 AM ET

The Chicagoland area will experience cooler weather throughout the week. more >

Tue. Pollen

Tue. Dust & Dander

Tue. Wind Maps