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    • Today

      Jun 23

      85° /59°F
      Mostly cloudy and breezy
      • Ragweed Pollen
        • Ragweed Pollen
        • Grass Pollen
        • Tree Pollen
        • Mold
        • Dust & Dander
        • Air Quality Index
      • High
      • ragweed pollen levels
      • Grass Pollen: Moderate
      • Ragweed Pollen: High
      • Tree Pollen: Low
    • Sat

      Jun 24

      78° /55°
      Mostly sunny and not as warm
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Moderate
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
      More
    • Sun

      Jun 25

      79° /53°
      Breezy with clouds and sun
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Moderate
      • Ragweed Pollen: Moderate
      • Tree Pollen: Moderate
      More
    • Mon

      Jun 26

      77° /53°
      A passing afternoon shower
      • Low
      • ragweed pollen levels
      • Grass Pollen: Moderate
      • Ragweed Pollen: Low
      • Tree Pollen: Moderate
      More
    • Tue

      Jun 27

      81° /61°
      Mostly sunny and nice
      • Low
      • ragweed pollen levels
      • Grass Pollen: High
      • Ragweed Pollen: Low
      • Tree Pollen: High
      More

    Day

    85°Hi RealFeel® 91° Precipitation 25%
    Mostly cloudy and breezy; less humid this afternoon
    • NW 15 mph
    • Gusts: 29 mph
    • Max UV Index: 7 (High)
    • Thunderstorms: 24%
    • Precipitation: 0 in
    • Rain: 0 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0 hrs
    • Hours of Rain: 0 hrs

    Night

    59°Lo RealFeel® 58° Precipitation 8%
    Cooler and less humid with clearing
    • NW 6 mph
    • Gusts: 10 mph
    • Max UV Index: N/A
    • Thunderstorms: 24%
    • Precipitation: 0 in
    • Rain: 0 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0 hrs
    • Hours of Rain: 0 hrs

    O'Fallon Pollen Levels Jun 23

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

      Low

    • Ragweed Pollen

      High

    • Mold

      Low

    • Grass Pollen

      Moderate

    Temperature History

    more Historical Weather Data >
      Today Normal Record 6/23/2016
    High 85° 87° N/A 99°
    Low 59° 65° N/A 72°

    Sunrise/Sunset

    • Sunrise: 5:38 AM
    • Sunset: 8:32 PM
    • Duration: 14:54 hr

    Moonrise/Moonset

    • Moonrise: 5:22 AM
    • Moonset: 8:06 PM
    • Duration: 14:44 hr
    Astronomy

    Fri. Pollen

    Fri. Dust & Dander

    Fri. Wind Maps