Zion, IL Weather & Growing Conditions
Today
83°F
Mostly Sunny
Mostly sunny, with a high near 83. South southwest wind around 10 mph, with gusts as high as 20 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Mostly Sunny | 10 mph SSW | 0% |
| Tonight | 67°F | Mostly Cloudy then Chance Showers And Thunderstorms | 5 to 10 mph SW | 48% |
| Wednesday | 77°F | Showers And Thunderstorms Likely | 5 mph S | 74% |
| Wednesday Night | 62°F | Showers And Thunderstorms | 5 mph NW | 77% |
| Thursday | 76°F | Chance Rain Showers | 5 mph NNE | 51% |
| Thursday Night | 61°F | Partly Cloudy | 0 to 5 mph S | 12% |
| Friday | 80°F | Mostly Sunny | 5 mph SW | 3% |
| Friday Night | 63°F | Mostly Clear | 5 mph S | 8% |
| Saturday | 83°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 15% |
| Saturday Night | 68°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 23% |
| Sunday | 84°F | Slight Chance Showers And Thunderstorms | 10 mph SW | 23% |
| Sunday Night | 67°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 10 mph WSW | 47% |
| Monday | 83°F | Chance Rain Showers | 5 to 10 mph S | 47% |
| Monday Night | 67°F | Chance Showers And Thunderstorms | 5 to 10 mph SSE | 48% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Zion, IL
Last spring frost
Apr 30
First fall frost
Oct 21
Growing season
173 days
Hardiness zone
6a
Explore more for Zion, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Chicago Waukegan Rgnl Ap, Il (3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.