Gillespie, IL Weather & Growing Conditions
Overnight
54°F
Slight Chance Drizzle
A slight chance of drizzle. Mostly cloudy, with a low around 54. Southwest wind around 12 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Slight Chance Drizzle | 12 mph SW | 18% |
| Wednesday | 58°F | Slight Chance Drizzle | 9 to 14 mph W | 13% |
| Wednesday Night | 41°F | Partly Cloudy | 7 mph SW | 1% |
| Thursday | 62°F | Mostly Sunny | 6 to 12 mph W | 0% |
| Thursday Night | 42°F | Mostly Cloudy | 5 mph NW | 1% |
| Friday | 55°F | Partly Sunny | 6 to 10 mph N | 3% |
| Friday Night | 32°F | Partly Cloudy | 1 to 7 mph N | 0% |
| Saturday | 54°F | Mostly Sunny | 3 mph NW | 0% |
| Saturday Night | 31°F | Partly Cloudy | 1 mph NW | 0% |
| Sunday | 59°F | Sunny | 1 to 6 mph NW | 1% |
| Sunday Night | 32°F | Clear | 2 mph W | 0% |
| Monday | 64°F | Sunny | 0 to 6 mph SW | 0% |
| Monday Night | 37°F | Clear | 2 mph SW | 0% |
| Tuesday | 67°F | Sunny | 5 mph W | 1% |
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 Nov 4, 2026.