Modesto, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Modesto, a village in Macoupin County, Illinois.
Today
86°F
Sunny
Sunny, with a high near 86. South wind around 5 mph.
7-day forecast for Modesto
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Sunny | 5 mph S | 0% |
| Tonight | 66°F | Mostly Clear | 5 mph S | 0% |
| Wednesday | 87°F | Mostly Sunny then Isolated Showers And Thunderstorms | 6 mph S | 18% |
| Wednesday Night | 67°F | Chance Showers And Thunderstorms | 5 mph S | 82% |
| Thursday | 83°F | Showers And Thunderstorms | 5 mph SW | 82% |
| Thursday Night | 65°F | Slight Chance Showers And Thunderstorms | 3 mph SE | 20% |
| Friday | 84°F | Partly Sunny | 3 mph SW | 10% |
| Friday Night | 66°F | Partly Cloudy then Chance Showers And Thunderstorms | 2 mph S | 25% |
| Saturday | 87°F | Chance Showers And Thunderstorms then Mostly Sunny | 5 mph S | 25% |
| Saturday Night | 70°F | Mostly Clear | 3 to 7 mph S | 8% |
| Sunday | 89°F | Sunny | 9 mph S | 4% |
| Sunday Night | 72°F | Mostly Clear | 8 mph S | 5% |
| Monday | 90°F | Mostly Sunny | 9 mph SW | 9% |
| Monday Night | 72°F | Slight Chance Showers And Thunderstorms | 8 mph S | 21% |
Forecast source: National Weather Service (api.weather.gov) for Modesto (39.479, -89.980). Updated through the day.
Growing snapshot for Modesto
Last spring frost
Apr 7
First fall frost
Oct 29
Growing season
205 days
Hardiness zone
6b
More local growing data for Modesto: nearby ZIP 62667 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Virden, Il (12 mi from Modesto). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.