New Grand Chain, IL Weather & Growing Conditions
This Afternoon
79°F
Partly Sunny
Partly sunny. High near 79, with temperatures falling to around 75 in the afternoon. South southeast wind around 17 mph, with gusts as high as 25 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 79°F | Partly Sunny | 17 mph SSE | 11% |
| Tonight | 56°F | Showers And Thunderstorms | 6 to 13 mph S | 99% |
| Wednesday | 69°F | Partly Sunny | 5 to 9 mph WSW | 8% |
| Wednesday Night | 42°F | Partly Cloudy | 2 mph WSW | 0% |
| Thursday | 69°F | Sunny | 1 to 6 mph SW | 0% |
| Thursday Night | 44°F | Partly Cloudy | 2 mph NW | 4% |
| Friday | 63°F | Partly Sunny | 2 to 8 mph NNW | 2% |
| Friday Night | 38°F | Partly Cloudy | 1 to 5 mph NNW | 1% |
| Saturday | 58°F | Mostly Sunny | 5 mph N | 0% |
| Saturday Night | 34°F | Partly Cloudy | 1 mph N | 1% |
| Sunday | 62°F | Sunny | 0 to 5 mph WNW | 5% |
| Sunday Night | 33°F | Mostly Clear | 2 mph NW | 6% |
| Monday | 65°F | Sunny | 1 to 6 mph W | 1% |
| Monday Night | 36°F | Mostly Clear | 2 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for New Grand Chain, IL
Last spring frost
Apr 3
First fall frost
Nov 5
Growing season
216 days
Hardiness zone
7a
Explore more for New Grand Chain, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Grand Chain Dam 53, Il (4.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.