Romeoville, IL Weather & Growing Conditions
This Afternoon
73°F
Rain Showers Likely
Rain showers likely. Mostly cloudy, with a high near 73. East wind 10 to 15 mph. Chance of precipitation is 60%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Rain Showers Likely | 10 to 15 mph E | 56% |
| Tonight | 63°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 10 mph E | 42% |
| Saturday | 78°F | Showers And Thunderstorms Likely | 5 to 10 mph SE | 79% |
| Saturday Night | 66°F | Showers And Thunderstorms Likely then Showers And Thunderstorms | 5 to 10 mph NNE | 82% |
| Sunday | 69°F | Showers And Thunderstorms | 10 to 15 mph NNE | 82% |
| Sunday Night | 56°F | Rain Showers Likely | 15 mph NE | 67% |
| Monday | 64°F | Rain Showers Likely | 15 mph ENE | 56% |
| Monday Night | 52°F | Chance Rain Showers | 10 to 15 mph ENE | 32% |
| Tuesday | 63°F | Slight Chance Rain Showers | 10 to 15 mph NE | 24% |
| Tuesday Night | 52°F | Mostly Cloudy | 5 to 15 mph NE | 14% |
| Wednesday | 66°F | Partly Sunny | 10 mph NNE | 7% |
| Wednesday Night | 53°F | Mostly Cloudy | 5 to 10 mph NNE | 4% |
| Thursday | 69°F | Partly Sunny | 5 to 10 mph NNE | 5% |
| Thursday Night | 54°F | Mostly Cloudy | 5 mph NNE | 3% |
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 Sep 19, 2026.