Mill Creek, IL Weather & Growing Conditions
Tonight
56°F
Showers And Thunderstorms then Chance Showers And Thunderstorms
Showers and thunderstorms before 11pm, then a chance of showers and thunderstorms between 11pm and 1am. Mostly cloudy. Low around 56, with temperatures rising to around 58 overnight. South southwest wind 6 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 100%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 6 to 13 mph SSW | 99% |
| Wednesday | 68°F | Partly Sunny | 5 to 9 mph WSW | 7% |
| Wednesday Night | 43°F | Mostly Clear | 0 to 3 mph WSW | 0% |
| Thursday | 69°F | Sunny | 0 to 7 mph SW | 0% |
| Thursday Night | 45°F | Partly Cloudy | 1 mph NW | 5% |
| Friday | 62°F | Partly Sunny | 2 to 9 mph NNW | 1% |
| Friday Night | 40°F | Partly Cloudy | 2 to 6 mph NNW | 1% |
| Saturday | 58°F | Mostly Sunny | 5 mph N | 0% |
| Saturday Night | 35°F | Partly Cloudy | 1 mph NNW | 1% |
| Sunday | 63°F | Sunny | 0 to 6 mph WNW | 5% |
| Sunday Night | 35°F | Mostly Clear | 2 mph NW | 5% |
| Monday | 65°F | Sunny | 1 to 7 mph W | 2% |
| Monday Night | 38°F | Mostly Clear | 0 to 3 mph WSW | 0% |
| Tuesday | 69°F | Sunny | 1 to 5 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mill Creek, IL
Last spring frost
Apr 8
First fall frost
Oct 29
Growing season
203 days
Hardiness zone
7a
Explore more for Mill Creek, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Anna 2 Nne, Il (9.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.