| NWS Forecast for: Chicago/Romeoville, Lewis University Airport IL Issued by: National Weather Service Chicago, IL Last Update: 9:51 am CDT Jul 18, 2026 | |
Today: Showers and thunderstorms likely, mainly between 2pm and 5pm. Partly sunny, with a high near 90. Heat index values as high as 99. West wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms. Tonight: A 20 percent chance of showers and thunderstorms before 8pm. Patchy smoke after 10pm. Partly cloudy, with a low around 67. Northeast wind 5 to 10 mph. Sunday: Patchy smoke. Mostly sunny, with a high near 83. East northeast wind 5 to 10 mph. Sunday Night: Mostly clear, with a low around 64. East wind around 5 mph becoming south southeast after midnight. Winds could gust as high as 10 mph. Monday: Mostly sunny, with a high near 86. South southwest wind 5 to 15 mph, with gusts as high as 20 mph. Monday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 71. Chance of precipitation is 70%. Tuesday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 85. Tuesday Night: Mostly clear, with a low around 62. Wednesday: Sunny, with a high near 79. Wednesday Night: Mostly clear, with a low around 59. Thursday: Sunny, with a high near 81. Thursday Night: Partly cloudy, with a low around 62. Friday: Mostly sunny, with a high near 82. | |
| Chicago/Romeoville, Lewis University Airport IL 41.61°N 88.1°W | |
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