| National Weather Service Forecast for:
Plainfield, IL Issued by: National Weather Service Chicago/Romeoville, IL |
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| Updated: 07/25/2026 11:56pm | ||||||||||||||||||||||||||||||||||||||||
| Westmont, Illinois | ||||||||||||||||||||||||||||||||||||||||
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| Overnight |
Patchy fog after 3am. Mostly cloudy, with a low around 70. South wind 0 to 5 mph. |
| Sunday |
Patchy fog before 8am. Partly sunny, with a high near 88. Heat index values as high as 100. South southwest wind 0 to 10 mph, with gusts as high as 20 mph. |
| Sunday Night |
A chance of showers and thunderstorms after 9pm. Mostly cloudy, with a low around 74. Heat index values as high as 100. South southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible. |
| Monday |
A chance of showers and thunderstorms. Mostly sunny, with a high near 91. Heat index values as high as 104. Southwest wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%. |
| Monday Night |
A chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 71. West northwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. |
| Tuesday |
Mostly sunny, with a high near 86. |
| Tuesday Night |
Mostly clear, with a low around 63. |
| Wednesday |
Sunny, with a high near 84. |
| Wednesday Night |
Mostly clear, with a low around 62. |
| Thursday |
Sunny, with a high near 85. |
| Thursday Night |
A slight chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 66. |
| Friday |
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 85. |
| Friday Night |
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 67. |
| Saturday |
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 86. |
Forecast from NOAA-NWS for Plainfield, IL.