• Tonight

    Aug 20

    Lo 70°

    A couple of thunderstorms

    Ragweed Pollen Weather
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      30 - Moderate
    • Tree
      Pollen
      0 - Low
    more
  • Thu

    Aug 21

    88°Lo 73°

    An a.m. t-storm; partly sunny

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

    Aug 22

    91°Lo 72°

    A thunderstorm in the area

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

    Aug 23

    91°Lo 71°

    Clouds and sun, hot and humid

    Moderate ragweed pollen levels
    • Precip
      25%
    • Wind
      Speed
      6 mph
    • Cloud
      Cover
      46%
    more
  • Sun

    Aug 24

    92°Lo 69°

    Periods of sun; hot, humid

    Ragweed Pollen Weather
    • Precip
      17%
    • Wind
      Speed
      6 mph
    • Cloud
      Cover
      46%
    more
Next Previous
Hi 88° RealFeel® 96° Precipitation 57%

Day

N

E

S

W

  • SW 7 mph
  • Gusts: 14 mph

A morning shower or thunderstorm; otherwise, humid with intervals of clouds and sun

  • Max UV Index: 5 (Moderate)
  • Thunderstorms: 60%
  • Precipitation: 0.09 in
  • Rain: 0.09 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 1 hrs
  • Hours of Rain: 1 hrs
Lo 73° RealFeel® 74° Precipitation 55%

Night

N

E

S

W

  • SW 6 mph
  • Gusts: 10 mph

Clouds breaking with a t-storm; warm and humid; thunderstorms can bring hail and damaging winds

  • 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 - August 21

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

    Pollen

    Low

  • Weed

    Pollen

    Moderate

  • Tree

    Pollen

    Low

  • Mold

    Pollen

    Low

Temperature History - Aug 21

more Historical Weather Data >
  Today Normal Record 8/21/2013
High 88° 82° 101° (1947) 90°
Low 73° 62° 46° (1950) 58°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:10 AM with 13:36 of sunlight, then sets at 7:46 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 2:40 AM with 14:35 of moolight, then sets at 5:15 PM

Top Story

Ottawa Weather Report

Chicago: Threat of Thunderstorms Lingers After Heavy Rains Flood Wrigley Field

August 20, 2014; 10:50 PM ET

While there may be a mix of sunshine and clouds over the area, Chicago is facing more rounds of thunderstorms over the next several days. more >

Thu. Pollen

Thu. Dust & Dander

Thu. Wind Maps