South Jacksonville, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for South Jacksonville, a village in Morgan County, Illinois.
This Afternoon
92°F
Mostly Cloudy
Mostly cloudy, with a high near 92. South southwest wind around 6 mph.
7-day forecast for South Jacksonville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 92°F | Mostly Cloudy | 6 mph SSW | 3% |
| Tonight | 69°F | Mostly Cloudy | 3 to 7 mph SSW | 9% |
| Sunday | 85°F | Chance Showers And Thunderstorms | 5 to 10 mph NNW | 38% |
| Sunday Night | 61°F | Chance Showers And Thunderstorms | 8 to 13 mph NE | 66% |
| Monday | 71°F | Showers And Thunderstorms Likely | 10 mph ENE | 71% |
| Monday Night | 55°F | Chance Showers And Thunderstorms | 10 mph NE | 46% |
| Tuesday | 67°F | Chance Rain Showers then Mostly Cloudy | 12 mph NE | 46% |
| Tuesday Night | 51°F | Mostly Cloudy | 5 to 12 mph NNE | 5% |
| Wednesday | 69°F | Partly Sunny | 8 mph NNE | 2% |
| Wednesday Night | 53°F | Partly Cloudy | 2 to 7 mph NNE | 1% |
| Thursday | 72°F | Partly Sunny | 2 to 6 mph NNE | 0% |
| Thursday Night | 56°F | Mostly Cloudy then Slight Chance Rain Showers | 1 to 5 mph NE | 15% |
| Friday | 76°F | Slight Chance Rain Showers | 1 to 6 mph NE | 16% |
| Friday Night | 56°F | Slight Chance Rain Showers then Partly Cloudy | 5 mph NE | 15% |
Forecast source: National Weather Service (api.weather.gov) for South Jacksonville (39.699, -90.224). Updated through the day.
Growing snapshot for South Jacksonville
Last spring frost
Apr 19
First fall frost
Oct 17
Growing season
179 days
Hardiness zone
6a
More local growing data for South Jacksonville: nearby ZIP 62650 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Alexander
Chapin
Concord
Franklin
Jacksonville
Lynnville
Meredosia
Merritt
Murrayville
Riggston
Waverly
Woodson
Climate data from the nearest NOAA station, Jacksonville 2E, Il (1.2 mi from South Jacksonville). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.