Henderson, IL Weather & Growing Conditions
This Afternoon
83°F
Slight Chance Rain Showers
A slight chance of rain showers before 2pm. Mostly cloudy, with a high near 83. South wind around 9 mph, with gusts as high as 18 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 |
|---|---|---|---|---|
| This Afternoon | 83°F | Slight Chance Rain Showers | 9 mph S | 17% |
| Tonight | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 6 mph SSE | 66% |
| Sunday | 72°F | Showers And Thunderstorms Likely | 5 to 14 mph NNE | 73% |
| Sunday Night | 57°F | Chance Showers And Thunderstorms | 14 mph NE | 54% |
| Monday | 63°F | Rain Showers Likely | 13 to 16 mph ENE | 73% |
| Monday Night | 54°F | Rain Showers Likely | 10 to 14 mph ENE | 69% |
| Tuesday | 62°F | Rain Showers Likely | 14 mph NE | 55% |
| Tuesday Night | 50°F | Mostly Cloudy | 6 to 12 mph NNE | 8% |
| Wednesday | 64°F | Partly Sunny | 9 mph NNE | 3% |
| Wednesday Night | 52°F | Partly Cloudy | 2 to 7 mph NE | 1% |
| Thursday | 68°F | Partly Sunny | 5 mph NE | 2% |
| Thursday Night | 55°F | Mostly Cloudy | 3 mph NE | 5% |
| Friday | 72°F | Partly Sunny | 2 to 6 mph NE | 6% |
| Friday Night | 55°F | Partly Cloudy | 3 mph ENE | 4% |
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 Sep 19, 2026.