Jonesboro, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Jonesboro, a city in Union County, Illinois.
Overnight
56°F
Chance Rain Showers
A chance of rain showers before 3am. Mostly cloudy. Low around 56, with temperatures rising to around 58 overnight. South southwest wind around 9 mph. Chance of precipitation is 30%.
7-day forecast for Jonesboro
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Chance Rain Showers | 9 mph SSW | 29% |
| Wednesday | 66°F | Partly Sunny | 5 to 9 mph W | 6% |
| Wednesday Night | 44°F | Mostly Clear | 3 mph WSW | 0% |
| Thursday | 68°F | Sunny | 2 to 7 mph SW | 0% |
| Thursday Night | 46°F | Partly Cloudy | 2 mph WNW | 5% |
| Friday | 61°F | Partly Sunny | 3 to 9 mph NNW | 1% |
| Friday Night | 41°F | Partly Cloudy | 6 mph NNW | 1% |
| Saturday | 58°F | Mostly Sunny | 5 mph NNW | 0% |
| Saturday Night | 36°F | Partly Cloudy | 1 mph NW | 1% |
| Sunday | 62°F | Sunny | 1 to 6 mph WNW | 5% |
| Sunday Night | 36°F | Mostly Clear | 3 mph WNW | 5% |
| Monday | 64°F | Sunny | 1 to 7 mph W | 2% |
| Monday Night | 39°F | Mostly Clear | 3 mph SW | 0% |
| Tuesday | 69°F | Sunny | 2 to 6 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Jonesboro (37.451, -89.267). Updated through the day.
Growing snapshot for Jonesboro
Last spring frost
Apr 8
First fall frost
Oct 29
Growing season
203 days
Hardiness zone
7a
More local growing data for Jonesboro: nearby ZIP 62952 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Anna 2 Nne, Il (7.4 mi from Jonesboro). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.