• Today

    Aug 24

    84°Lo 71°

    A few strong thunderstorms

    High ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      5 - High
    • Tree
      Pollen
      1 - Low
    more
  • Thu

    Aug 25

    81°Lo 60°

    Mostly cloudy with a t-storm

    High ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      5 - High
    • Tree
      Pollen
      1 - Low
  • Fri

    Aug 26

    78°Lo 61°

    Periods of sun; less humid

    High ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      5 - High
    • Tree
      Pollen
      1 - Low
    more
  • Sat

    Aug 27

    81°Lo 68°

    An afternoon thunderstorm

    High ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      5 - High
    • Tree
      Pollen
      1 - Low
    more
  • Sun

    Aug 28

    84°Lo 66°

    Periods of sun with a t-storm

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
Next Previous
Hi 81° RealFeel® 92° Precipitation 55%

Day

N

E

S

W

  • W 6 mph
  • Gusts: 12 mph

Mostly cloudy and humid with a shower or thunderstorm around

  • Max UV Index: 4 (Moderate)
  • Thunderstorms: 60%
  • Precipitation: 0.35 in
  • Rain: 0.35 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 1.5 hrs
  • Hours of Rain: 1.5 hrs
Lo 60° RealFeel® 60° Precipitation 15%

Night

N

E

S

W

  • NNW 5 mph
  • Gusts: 7 mph

Mostly cloudy

  • Max UV Index: N/A
  • Thunderstorms: 20%
  • 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 25

  • Extreme
  • Very High
  • High
  • Moderate
  • Low
  • Tree Pollen

    Low

  • Ragweed Pollen

    High

  • Mold

    High

  • Grass Pollen

    Low

Temperature History - Aug 25

more Historical Weather Data >
  Today Normal Record 8/25/2015
High 81° 82° 98° (1936) 74°
Low 60° 61° 39° (1923) 54°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:15 AM with 13:23 of sunlight, then sets at 7:38 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 10:16 AM with 4:05 of moolight, then sets at 2:22 PM

Ottawa Weather Report

Strong thunderstorms to stretch across central US this week

August 24, 2016; 3:48 AM ET

The return of warmer and more humid air will trigger another round of strong thunderstorms across the central United States this week. more >

Thu. Pollen

Thu. Dust & Dander

Thu. Wind Maps