Jonesboro, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Jonesboro, a city in Union County, Illinois.
Overnight
65°F
Patchy Fog
Patchy fog. Mostly clear. Low around 65, with temperatures rising to around 68 overnight. East northeast wind around 1 mph.
7-day forecast for Jonesboro
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 65°F | Patchy Fog | 1 mph ENE | 0% |
| Tuesday | 88°F | Patchy Fog then Sunny | 2 mph ENE | 0% |
| Tuesday Night | 65°F | Mostly Clear | 2 mph ENE | 0% |
| Wednesday | 90°F | Sunny | 2 mph S | 0% |
| Wednesday Night | 69°F | Mostly Clear | 2 mph S | 2% |
| Thursday | 90°F | Slight Chance Showers And Thunderstorms | 2 to 7 mph SSW | 22% |
| Thursday Night | 71°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 1 to 5 mph S | 58% |
| Friday | 89°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 6 mph SSW | 58% |
| Friday Night | 71°F | Chance Showers And Thunderstorms | 3 mph SSW | 42% |
| Saturday | 89°F | Chance Showers And Thunderstorms | 5 mph SSW | 35% |
| Saturday Night | 71°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 3 mph S | 19% |
| Sunday | 91°F | Mostly Sunny | 3 to 8 mph SSW | 9% |
| Sunday Night | 72°F | Mostly Clear | 3 to 7 mph SSW | 5% |
| Monday | 93°F | Sunny | 5 to 8 mph SSW | 6% |
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 Aug 4, 2026.