• Friday

    May 15

    76°Lo 46°

    Warm with rain and a t-storm

    Advisory for hair frizz
    • Wind
      Gust
      18 mph
    • Precip
      65%
    • Hours of Precip
      6
    more
  • Saturday

    May 16

    68°Lo 54°

    Cloudy, a shower; not as warm

    Watch for hair frizz
    • Wind
      Gust
      29 mph
    • Precip
      55%
    • Hours of Precip
      1
    more
  • Sunday

    May 17

    81°Lo 57°

    Some sun, a shower; warmer

    Watch for hair frizz
    • Wind
      Gust
      32 mph
    • Precip
      55%
    • Hours of Precip
      1
    more
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St. Charles Weather Report

Chicago: Warm, Stormy Weather to Span the Week

May 6, 2015; 7:02 PM ET

Showers and thunderstorms are in the offing for the Chicago area through the end of the week, in addition to doses of above-average warmth. more >

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The History Behind the UV Index

Nov 12, 2012; 5:00 AM ET The UV index has been around since the early 1990s. It was created to help you plan outdoor activities in hopes to limit overexposure to the sun. Jeannette Calle has more.