Plainfield, IL Weather & Growing Conditions
Tonight
59°F
Rain Showers
Rain showers. Cloudy. Low around 59, with temperatures rising to around 61 overnight. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 59°F | Rain Showers | 15 mph S | 88% |
| Wednesday | 63°F | Rain Showers Likely | 15 mph SSW | 55% |
| Wednesday Night | 48°F | Cloudy | 15 mph SW | 14% |
| Thursday | 57°F | Chance Rain Showers | 10 to 15 mph WSW | 28% |
| Thursday Night | 43°F | Chance Rain Showers | 5 to 10 mph WNW | 35% |
| Friday | 53°F | Slight Chance Rain Showers | 10 mph N | 23% |
| Friday Night | 36°F | Partly Cloudy | 5 to 10 mph NNW | 6% |
| Saturday | 52°F | Mostly Sunny | 5 mph WNW | 6% |
| Saturday Night | 34°F | Partly Cloudy | 0 to 5 mph WSW | 3% |
| Sunday | 57°F | Mostly Sunny | 5 to 10 mph W | 12% |
| Sunday Night | 35°F | Mostly Clear | 5 mph WNW | 7% |
| Monday | 61°F | Sunny | 5 to 10 mph WSW | 3% |
| Monday Night | 39°F | Mostly Clear | 5 to 10 mph WSW | 2% |
| Tuesday | 62°F | Sunny | 5 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Plainfield, IL
Last spring frost
Apr 20
First fall frost
Oct 22
Growing season
184 days
Hardiness zone
5b
Explore more for Plainfield, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Romeoville Wfo, Il (6.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.