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    • Today

      Sep 25

      83° /51°F
      An afternoon thunderstorm
      • Ragweed Pollen
        • Ragweed Pollen
        • Grass Pollen
        • Tree Pollen
        • Mold
        • Dust & Dander
        • Air Quality Index
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
    • Mon

      Sep 26

      65° /45°
      Clouds breaking and windy
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
      More
    • Tue

      Sep 27

      64° /47°
      Cool with sun and some clouds
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
      More
    • Wed

      Sep 28

      63° /48°
      A morning shower in spots
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
      More
    • Thu

      Sep 29

      69° /49°
      Mostly sunny
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More

    Day

    83°Hi RealFeel® 88° Precipitation 59%
    Mostly cloudy and warmer; a shower or thunderstorm this afternoon
    • S 9 mph
    • Gusts: 17 mph
    • Max UV Index: 4 (Moderate)
    • Thunderstorms: 60%
    • Precipitation: 0.15 in
    • Rain: 0.15 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 1 hrs
    • Hours of Rain: 1 hrs

    Night

    51°Lo RealFeel® 42° Precipitation 57%
    Plenty of clouds with a shower or thunderstorm around until after midnight; breezy
    • W 16 mph
    • Gusts: 29 mph
    • Max UV Index: N/A
    • Thunderstorms: 40%
    • Precipitation: 0.21 in
    • Rain: 0.21 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 1.5 hrs
    • Hours of Rain: 1.5 hrs

    St. Charles Pollen Levels Sep 25

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

      Low

    • Ragweed Pollen

      Moderate

    • Mold

      Low

    • Grass Pollen

      Low

    Temperature History

    more Historical Weather Data >
      Today Normal Record 9/25/2015
    High 83° 71° 85° (2007) 75°
    Low 51° 50° 38° (2001) 55°

    Sunrise/Sunset

    • Sunrise: 6:45 AM
    • Sunset: 6:44 PM
    • Duration: 11:59 hr

    Moonrise/Moonset

    • Moonrise: 1:20 AM
    • Moonset: 3:54 PM
    • Duration: 14:34 hr
    Astronomy

    St. Charles Weather Report

    Chilly winds to howl across Great Lakes early this week

    September 25, 2016; 4:43 AM ET

    Gusty winds will accompany a push of chilly air across the Great Lakes from Sunday night through Tuesday. More >

    Sun. Pollen

    Sun. Dust & Dander

    Sun. Wind Maps