Henderson, IL Weather & Growing Conditions
Today
87°F
Mostly Sunny
Mostly sunny, with a high near 87. South southwest wind 6 to 9 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Mostly Sunny | 6 to 9 mph SSW | 0% |
| Tonight | 67°F | Chance Showers And Thunderstorms | 5 mph SSE | 57% |
| Wednesday | 80°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 5 mph SSW | 67% |
| Wednesday Night | 64°F | Showers And Thunderstorms | 5 mph N | 82% |
| Thursday | 80°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 5 mph NNE | 61% |
| Thursday Night | 63°F | Mostly Clear | 0 to 3 mph ENE | 7% |
| Friday | 82°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 mph SSE | 16% |
| Friday Night | 65°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 3 mph SSE | 16% |
| Saturday | 85°F | Sunny | 3 to 7 mph SSW | 10% |
| Saturday Night | 70°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 15% |
| Sunday | 87°F | Slight Chance Showers And Thunderstorms then Sunny | 9 to 13 mph SSW | 15% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms | 10 mph S | 29% |
| Monday | 86°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 8 to 12 mph SSW | 29% |
| Monday Night | 71°F | Slight Chance Showers And Thunderstorms | 10 mph SSW | 30% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Henderson, IL
Last spring frost
Apr 20
First fall frost
Oct 19
Growing season
180 days
Hardiness zone
5b
Explore more for Henderson, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Galesburg, Il (6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.