Jacksonville, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Jacksonville, a city in Morgan County, Illinois.
This Afternoon
57°F
Slight Chance Drizzle
A slight chance of drizzle. Cloudy, with a high near 57. West southwest wind 10 to 15 mph, with gusts as high as 21 mph.
7-day forecast for Jacksonville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 57°F | Slight Chance Drizzle | 10 to 15 mph WSW | 10% |
| Tonight | 44°F | Patchy Drizzle then Mostly Cloudy | 9 mph SW | 10% |
| Thursday | 58°F | Partly Sunny | 8 to 13 mph W | 14% |
| Thursday Night | 40°F | Slight Chance Light Rain then Cloudy | 5 to 8 mph NW | 16% |
| Friday | 51°F | Partly Sunny | 6 to 10 mph N | 2% |
| Friday Night | 30°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Saturday | 53°F | Sunny | 0 to 3 mph NNW | 0% |
| Saturday Night | 30°F | Mostly Clear | 1 mph NW | 0% |
| Sunday | 59°F | Sunny | 1 to 6 mph W | 0% |
| Sunday Night | 33°F | Mostly Clear | 2 mph W | 0% |
| Monday | 64°F | Sunny | 0 to 7 mph SW | 0% |
| Monday Night | 37°F | Clear | 5 mph SW | 1% |
| Tuesday | 65°F | Sunny | 3 mph W | 3% |
| Tuesday Night | 38°F | Mostly Clear | 2 mph NNW | 3% |
Forecast source: National Weather Service (api.weather.gov) for Jacksonville (39.729, -90.232). Updated through the day.
Growing snapshot for Jacksonville
Last spring frost
Apr 19
First fall frost
Oct 17
Growing season
179 days
Hardiness zone
6a
More local growing data for Jacksonville: nearby ZIP 62650 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Alexander
Chapin
Concord
Franklin
Lynnville
Meredosia
Merritt
Murrayville
Riggston
South Jacksonville
Waverly
Woodson
Climate data from the nearest NOAA station, Jacksonville 2E, Il (1.2 mi from Jacksonville). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.