Sparta, IL Weather & Growing Conditions
Today
86°F
Patchy Fog then Sunny
Patchy fog before 7am. Sunny, with a high near 86. East wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Patchy Fog then Sunny | 1 mph E | 0% |
| Tonight | 65°F | Mostly Clear | 2 mph SE | 0% |
| Wednesday | 89°F | Sunny | 3 mph S | 2% |
| Wednesday Night | 69°F | Partly Cloudy then Chance Showers And Thunderstorms | 5 mph S | 38% |
| Thursday | 87°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 mph SW | 57% |
| Thursday Night | 69°F | Chance Showers And Thunderstorms | 2 mph S | 56% |
| Friday | 87°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 3 mph SW | 56% |
| Friday Night | 69°F | Chance Showers And Thunderstorms | 1 mph S | 42% |
| Saturday | 88°F | Chance Showers And Thunderstorms | 3 mph S | 42% |
| Saturday Night | 70°F | Partly Cloudy | 5 mph S | 11% |
| Sunday | 90°F | Sunny | 6 mph S | 7% |
| Sunday Night | 72°F | Mostly Clear | 7 mph S | 5% |
| Monday | 92°F | Sunny | 7 mph S | 5% |
| Monday Night | 73°F | Mostly Clear | 8 mph S | 10% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Sparta, IL
Last spring frost
Apr 12
First fall frost
Oct 22
Growing season
191 days
Hardiness zone
7a
Explore more for Sparta, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Sparta 1 W, Il (0.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.