| National Weather Service Forecast for:
Plainfield, IL Issued by: National Weather Service Chicago/Romeoville, IL |
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| Updated: 07/18/2026 3:55am | ||||||||||||||||||||||||||||||||||||||||
| Westmont, Illinois | ||||||||||||||||||||||||||||||||||||||||
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Air Quality Alert issued July 18 at 12:13AM CDT
| Overnight |
Mostly clear, with a low around 73. West southwest wind around 10 mph, with gusts as high as 20 mph. |
| Saturday |
Showers and thunderstorms likely after noon. Mostly sunny. High near 90, with temperatures falling to around 86 in the afternoon. Heat index values as high as 101. West northwest 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 possible. |
| Saturday Night |
A slight chance of showers and thunderstorms before 7pm, then patchy smoke. Mostly clear, with a low around 66. Northeast wind 5 to 10 mph. Chance of precipitation is 20%. New rainfall amounts between a tenth and quarter of an inch possible. |
| Sunday |
Patchy smoke. Sunny, with a high near 83. East northeast wind around 5 mph. |
| Sunday Night |
Patchy smoke before 7pm. Mostly clear, with a low around 63. Southeast wind around 5 mph. |
| Monday |
Mostly sunny, with a high near 86. |
| Monday Night |
Showers and thunderstorms likely between 7pm and 10pm, then showers and thunderstorms likely between 10pm and 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 70. |
| Tuesday |
Showers and thunderstorms likely before 7am, then a slight chance of showers and thunderstorms between 7am and 1pm. Mostly sunny, with a high near 84. |
| Tuesday Night |
Mostly clear, with a low around 61. |
| Wednesday |
Sunny, with a high near 79. |
| Wednesday Night |
Mostly clear, with a low around 58. |
| Thursday |
Sunny, with a high near 80. |
| Thursday Night |
Partly cloudy, with a low around 61. |
| Friday |
Mostly sunny, with a high near 82. |
Forecast from NOAA-NWS for Plainfield, IL.