New Grand Chain, IL Weather & Growing Conditions
Today
87°F
Sunny
Sunny, with a high near 87. East northeast wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Sunny | 3 mph ENE | 0% |
| Tonight | 65°F | Mostly Clear then Patchy Fog | 2 mph E | 0% |
| Wednesday | 88°F | Patchy Fog then Sunny | 3 mph S | 0% |
| Wednesday Night | 69°F | Mostly Clear | 2 mph E | 0% |
| Thursday | 88°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph SSW | 18% |
| Thursday Night | 71°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 2 mph S | 33% |
| Friday | 87°F | Chance Showers And Thunderstorms | 2 to 6 mph SW | 51% |
| Friday Night | 70°F | Chance Showers And Thunderstorms | 0 to 3 mph SW | 49% |
| Saturday | 88°F | Chance Showers And Thunderstorms | 1 to 5 mph SW | 49% |
| Saturday Night | 71°F | Mostly Clear | 2 mph S | 14% |
| Sunday | 90°F | Sunny | 2 to 7 mph SSW | 8% |
| Sunday Night | 73°F | Mostly Clear | 5 mph S | 5% |
| Monday | 92°F | Sunny | 5 to 9 mph SSW | 7% |
| Monday Night | 75°F | Mostly Clear | 5 to 8 mph SSW | 5% |
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 Aug 4, 2026.