• Today

    Aug 25

    90°Lo 71°

    A p.m. t-storm in spots

    Beneficial weather for sinus headaches
    • Hi
      RealFeel
      104°
    • UV
      5 - High
    • Cloud
      Cover
      56%
    more
  • Fri

    Aug 26

    87°Lo 72°

    A heavy thunderstorm

    Beneficial weather for sinus headaches
    • Hi
      RealFeel
      99°
    • UV
      4 - Moderate
    • Cloud
      Cover
      90%
    more
  • Sat

    Aug 27

    84°Lo 70°

    Variable clouds, a t-storm

    Beneficial weather for sinus headaches
    • Hi
      RealFeel
      97°
    • UV
      4 - Moderate
    • Cloud
      Cover
      87%
  • Sun

    Aug 28

    88°Lo 70°

    Clouds and sun with a t-storm

    Beneficial weather for sinus headaches
    • Hi
      RealFeel
      100°
    • UV
      4 - Moderate
    • Cloud
      Cover
      68%
    more
  • Mon

    Aug 29

    88°Lo 70°

    Partly sunny with a t-storm

    Beneficial weather for sinus headaches
    • Hi
      RealFeel
      101°
    • UV
      5 - High
    • Cloud
      Cover
      52%
    more
Next Previous
Hi 84° RealFeel® 97° Precipitation 63%

Day

N

E

S

W

  • SSE 6 mph
  • Gusts: 8 mph

More clouds than sun; humid with a shower or thunderstorm around

  • Max UV Index: 5 (Moderate)
  • Thunderstorms: 60%
  • Precipitation: 0.31 in
  • Rain: 0.31 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 1.5 hrs
  • Hours of Rain: 1.5 hrs
Lo 70° RealFeel® 74° Precipitation 21%

Night

N

E

S

W

  • S 4 mph
  • Gusts: 7 mph

Mostly cloudy and humid

  • 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

Temperature History - Aug 27

more Historical Weather Data >
  Today Normal Record 8/27/2015
High 84° 86° N/A 78°
Low 70° 63° N/A 53°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:28 AM with 13:11 of sunlight, then sets at 7:39 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 1:46 AM with 14:35 of moolight, then sets at 4:21 PM

O'Fallon Weather Report

Locally severe thunderstorms to target New York to Kansas into Thursday night

August 25, 2016; 1:04 PM ET

Thunderstorms with the risk of locally severe weather will extend from the central Plains to the eastern Great Lakes into Thursday evening. more >

Sat. Sinus Headache

Sat. UV Index