Jacksonville, IL Weather & Growing Conditions
Overnight
71°F
Partly Cloudy
Partly cloudy, with a low around 71. South southeast wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 71°F | Partly Cloudy | 7 mph SSE | 5% |
| Saturday | 93°F | Mostly Cloudy | 7 mph SSW | 9% |
| Saturday Night | 69°F | Mostly Cloudy then Chance Showers And Thunderstorms | 5 mph SSW | 27% |
| Sunday | 83°F | Chance Showers And Thunderstorms | 2 to 9 mph NNW | 48% |
| Sunday Night | 61°F | Chance Showers And Thunderstorms | 9 to 13 mph NE | 71% |
| Monday | 70°F | Showers And Thunderstorms Likely | 13 mph NE | 71% |
| Monday Night | 55°F | Chance Rain Showers | 9 to 13 mph NE | 33% |
| Tuesday | 66°F | Slight Chance Rain Showers | 13 mph NE | 24% |
| Tuesday Night | 50°F | Mostly Cloudy | 5 to 12 mph NNE | 8% |
| Wednesday | 70°F | Mostly Sunny | 9 mph NNE | 1% |
| Wednesday Night | 52°F | Partly Cloudy | 2 to 8 mph NNE | 1% |
| Thursday | 72°F | Mostly Sunny | 3 to 7 mph NNE | 3% |
| Thursday Night | 55°F | Partly Cloudy | 2 to 6 mph NNE | 3% |
| Friday | 75°F | Mostly Sunny | 3 to 7 mph NE | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Jacksonville, IL
Last spring frost
Apr 19
First fall frost
Oct 17
Growing season
179 days
Hardiness zone
6a
Explore more for Jacksonville, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Jacksonville 2E, Il (1.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.