Zion, IL Weather & Growing Conditions
This Afternoon
66°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Cloudy, with a high near 66. East wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 66°F | Showers And Thunderstorms Likely | 5 to 10 mph E | 69% |
| Tonight | 62°F | Showers And Thunderstorms | 5 to 15 mph NE | 98% |
| Sunday | 66°F | Showers And Thunderstorms | 15 to 20 mph NE | 81% |
| Sunday Night | 54°F | Mostly Cloudy | 15 to 20 mph NE | 14% |
| Monday | 64°F | Chance Rain Showers | 15 to 20 mph ENE | 27% |
| Monday Night | 52°F | Slight Chance Rain Showers | 15 mph ENE | 22% |
| Tuesday | 63°F | Slight Chance Rain Showers | 15 to 20 mph ENE | 22% |
| Tuesday Night | 52°F | Mostly Cloudy | 10 to 15 mph ENE | 14% |
| Wednesday | 64°F | Slight Chance Rain Showers | 10 to 15 mph NE | 17% |
| Wednesday Night | 52°F | Mostly Cloudy | 5 to 10 mph ENE | 8% |
| Thursday | 66°F | Partly Sunny | 5 to 10 mph NE | 3% |
| Thursday Night | 53°F | Mostly Cloudy | 5 mph NE | 11% |
| Friday | 68°F | Partly Sunny | 5 to 10 mph NE | 10% |
| Friday Night | 54°F | Partly Cloudy | 0 to 5 mph NE | 4% |
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 Sep 19, 2026.