Romeoville, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Romeoville, a village in Will County, Illinois.
Today
63°F
Slight Chance Drizzle then Slight Chance Rain Showers
A slight chance of drizzle before noon, then a slight chance of rain showers and a slight chance of drizzle. Mostly cloudy. High near 63, with temperatures falling to around 56 in the afternoon. Southwest wind around 15 mph, with gusts as high as 25 mph.
7-day forecast for Romeoville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 63°F | Slight Chance Drizzle then Slight Chance Rain Showers | 15 mph SW | 11% |
| Tonight | 46°F | Slight Chance Rain Showers then Cloudy | 10 to 15 mph SW | 14% |
| Thursday | 55°F | Mostly Cloudy then Chance Rain | 10 to 15 mph WSW | 51% |
| Thursday Night | 39°F | Chance Rain then Cloudy | 10 mph NNW | 47% |
| Friday | 49°F | Partly Sunny | 10 to 15 mph NNW | 2% |
| 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% |
| Tuesday Night | 39°F | Partly Cloudy | 0 to 5 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Romeoville (41.628, -88.101). Updated through the day.
Growing snapshot for Romeoville
Last spring frost
Apr 20
First fall frost
Oct 22
Growing season
184 days
Hardiness zone
6a
More local growing data for Romeoville: nearby ZIP 60446 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Romeoville Wfo, Il (2.1 mi from Romeoville). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.