Gillespie, IL Weather & Growing Conditions
Overnight
64°F
Clear
Clear, with a low around 64. Southeast wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 64°F | Clear | 3 mph SE | 0% |
| Tuesday | 86°F | Sunny | 3 mph S | 0% |
| Tuesday Night | 64°F | Mostly Clear | 3 mph SE | 0% |
| Wednesday | 88°F | Sunny | 2 to 6 mph S | 14% |
| Wednesday Night | 68°F | Chance Showers And Thunderstorms | 6 mph S | 76% |
| Thursday | 84°F | Showers And Thunderstorms | 5 mph S | 76% |
| Thursday Night | 66°F | Slight Chance Showers And Thunderstorms | 3 mph SE | 21% |
| Friday | 84°F | Slight Chance Showers And Thunderstorms then Partly Sunny | 3 mph SW | 21% |
| Friday Night | 66°F | Chance Showers And Thunderstorms | 2 mph S | 29% |
| Saturday | 87°F | Chance Showers And Thunderstorms then Mostly Sunny | 1 to 5 mph S | 29% |
| Saturday Night | 69°F | Mostly Clear | 5 mph S | 9% |
| Sunday | 89°F | Sunny | 5 to 9 mph S | 6% |
| Sunday Night | 72°F | Mostly Clear | 8 mph S | 4% |
| Monday | 90°F | Mostly Sunny | 8 mph SW | 6% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Gillespie, IL
Last spring frost
Apr 14
First fall frost
Oct 21
Growing season
188 days
Hardiness zone
6b
Explore more for Gillespie, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Carlinville, Il (10.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.