Mount Zion, IL Weather & Growing Conditions
Today
85°F
Patchy Fog then Sunny
Patchy fog before 9am. Sunny, with a high near 85. South southeast wind 2 to 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Patchy Fog then Sunny | 2 to 6 mph SSE | 0% |
| Tonight | 65°F | Mostly Clear | 5 mph SSE | 0% |
| Wednesday | 86°F | Mostly Sunny | 3 to 8 mph S | 7% |
| Wednesday Night | 67°F | Chance Showers And Thunderstorms | 6 mph S | 81% |
| Thursday | 82°F | Showers And Thunderstorms | 7 mph SSW | 81% |
| Thursday Night | 65°F | Slight Chance Showers And Thunderstorms | 2 to 6 mph S | 24% |
| Friday | 83°F | Partly Sunny | 5 mph SW | 12% |
| Friday Night | 66°F | Slight Chance Showers And Thunderstorms | 3 mph SSW | 20% |
| Saturday | 85°F | Slight Chance Rain Showers then Mostly Sunny | 6 mph SSW | 19% |
| Saturday Night | 69°F | Mostly Clear | 5 to 8 mph SSW | 13% |
| Sunday | 88°F | Sunny | 8 to 13 mph SSW | 7% |
| Sunday Night | 71°F | Mostly Clear | 12 mph SSW | 11% |
| Monday | 88°F | Mostly Sunny | 12 mph SSW | 13% |
| Monday Night | 72°F | Chance Showers And Thunderstorms | 10 mph SW | 25% |
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 Aug 4, 2026.