| National Weather Service Forecast for:
Plainfield, IL Issued by: National Weather Service Chicago/Romeoville, IL |
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| Updated: 09/18/2026 9:51pm | ||||||||||||||||||||||||||||||||||||||||
| Westmont, Illinois | ||||||||||||||||||||||||||||||||||||||||
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Flood Watch issued September 18 at 9:49PM CDT until September 19 at 1:00PM CDT
| Overnight |
A chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 63. East southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New rainfall amounts between a quarter and half of an inch possible. |
| Saturday |
Showers and thunderstorms likely before 9am, then showers and thunderstorms between 9am and 11am, then showers and thunderstorms likely. Some of the storms could produce heavy rain. Cloudy. High near 79, with temperatures falling to around 76 in the afternoon. Southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible. |
| Saturday Night |
Showers and thunderstorms likely before 10pm, then showers and thunderstorms. Mostly cloudy. Low around 66, with temperatures rising to around 68 overnight. Northeast wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible. |
| Sunday |
Showers and thunderstorms. Mostly cloudy, with a high near 70. North northeast wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. |
| Sunday Night |
Rain showers likely. Mostly cloudy, with a low around 57. Northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. |
| Monday |
Rain showers likely. Mostly cloudy, with a high near 65. Chance of precipitation is 60%. |
| Monday Night |
A chance of rain showers. Mostly cloudy, with a low around 53. |
| Tuesday |
A chance of rain showers before 1pm. Mostly cloudy, with a high near 64. |
| Tuesday Night |
Mostly cloudy, with a low around 52. |
| Wednesday |
Partly sunny, with a high near 67. |
| Wednesday Night |
Mostly cloudy, with a low around 53. |
| Thursday |
Partly sunny, with a high near 69. |
| Thursday Night |
Mostly cloudy, with a low around 54. |
| Friday |
Mostly sunny, with a high near 71. |
Forecast from NOAA-NWS for Plainfield, IL.