Romeoville, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Romeoville, a village in Will County, Illinois.
Today
84°F
Mostly Sunny
Mostly sunny, with a high near 84. South southwest wind 5 to 10 mph.
7-day forecast for Romeoville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny | 5 to 10 mph SSW | 7% |
| Tonight | 67°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph S | 21% |
| Wednesday | 80°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 5 mph WSW | 64% |
| Wednesday Night | 65°F | Showers And Thunderstorms | 5 mph W | 90% |
| Thursday | 79°F | Rain Showers Likely then Chance Showers And Thunderstorms | 5 mph SE | 74% |
| Thursday Night | 62°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SE | 30% |
| Friday | 82°F | Mostly Sunny | 0 to 5 mph S | 5% |
| Friday Night | 64°F | Mostly Clear | 0 to 5 mph SSW | 9% |
| Saturday | 84°F | Mostly Sunny | 5 to 10 mph SSW | 11% |
| Saturday Night | 69°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 17% |
| Sunday | 86°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 to 15 mph SW | 17% |
| Sunday Night | 70°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 38% |
| Monday | 85°F | Chance Rain Showers | 5 to 10 mph SSW | 38% |
| Monday Night | 69°F | Chance Showers And Thunderstorms | 5 to 10 mph E | 43% |
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 Aug 4, 2026.