Romeoville, IL Weather & Growing Conditions
Overnight
59°F
Chance Rain Showers
A chance of rain showers. Cloudy. Low around 59, with temperatures rising to around 61 overnight. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 59°F | Chance Rain Showers | 15 mph S | 42% |
| Wednesday | 63°F | Scattered Rain Showers then Patchy Drizzle | 15 mph SSW | 29% |
| Wednesday Night | 48°F | Patchy Drizzle then Mostly Cloudy | 15 mph SW | 10% |
| Thursday | 56°F | Mostly Cloudy then Chance Rain Showers | 10 to 15 mph WSW | 35% |
| Thursday Night | 42°F | Chance Rain Showers | 10 mph NW | 47% |
| Friday | 51°F | Slight Chance Rain Showers then Partly Sunny | 10 to 15 mph NNW | 16% |
| Friday Night | 35°F | Partly Cloudy | 5 to 10 mph NNW | 0% |
| Saturday | 51°F | Sunny | 5 mph NW | 0% |
| Saturday Night | 34°F | Mostly Clear | 5 mph W | 0% |
| Sunday | 56°F | Sunny | 5 to 10 mph W | 5% |
| Sunday Night | 35°F | Mostly Clear | 0 to 5 mph W | 1% |
| Monday | 60°F | Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 5 mph WSW | 1% |
| Tuesday | 62°F | Sunny | 5 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Romeoville, IL
Last spring frost
Apr 20
First fall frost
Oct 22
Growing season
184 days
Hardiness zone
6a
Explore more for Romeoville, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Romeoville Wfo, Il (2.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.