Mount Zion, IL Weather & Growing Conditions
Today
91°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms between 11am and 1pm. Mostly cloudy, with a high near 91. South southwest wind around 8 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 91°F | Slight Chance Showers And Thunderstorms | 8 mph SSW | 17% |
| Tonight | 69°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 7 mph SSW | 16% |
| Sunday | 83°F | Chance Showers And Thunderstorms | 3 to 12 mph NNW | 46% |
| Sunday Night | 59°F | Chance Showers And Thunderstorms | 12 to 16 mph NE | 61% |
| Monday | 70°F | Showers And Thunderstorms Likely | 16 mph NE | 70% |
| Monday Night | 54°F | Chance Rain Showers | 15 mph NE | 46% |
| Tuesday | 67°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 16 mph NE | 22% |
| Tuesday Night | 51°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 8 to 13 mph NNE | 20% |
| Wednesday | 70°F | Mostly Sunny | 12 mph NNE | 4% |
| Wednesday Night | 52°F | Partly Cloudy | 5 to 10 mph NNE | 3% |
| Thursday | 71°F | Mostly Sunny | 6 to 10 mph NNE | 3% |
| Thursday Night | 54°F | Partly Cloudy | 5 to 9 mph NNE | 3% |
| Friday | 74°F | Mostly Sunny | 6 to 10 mph NE | 2% |
| Friday Night | 53°F | Partly Cloudy | 5 to 9 mph NE | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mount Zion, IL
Last spring frost
Apr 16
First fall frost
Oct 22
Growing season
187 days
Hardiness zone
6a
Explore more for Mount Zion, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Decatur Ap, Il (4.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.