Henderson, IL Weather & Growing Conditions
This Afternoon
67°F
Light Rain
Rain before 3pm, then rain and a slight chance of thunderstorms. Mostly cloudy, with a high near 67. South southeast wind around 20 mph, with gusts as high as 33 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Light Rain | 20 mph SSE | 90% |
| Tonight | 52°F | Light Rain | 12 to 18 mph S | 78% |
| Wednesday | 57°F | Chance Light Rain | 17 mph SW | 25% |
| Wednesday Night | 46°F | Mostly Cloudy | 14 mph SW | 8% |
| Thursday | 56°F | Chance Light Rain | 9 to 15 mph W | 25% |
| Thursday Night | 43°F | Chance Light Rain | 6 to 9 mph NW | 30% |
| Friday | 52°F | Mostly Cloudy | 7 to 12 mph N | 14% |
| Friday Night | 39°F | Partly Cloudy | 1 to 6 mph N | 3% |
| Saturday | 54°F | Partly Sunny | 1 to 5 mph NW | 2% |
| Saturday Night | 37°F | Partly Cloudy | 3 mph WSW | 4% |
| Sunday | 56°F | Mostly Sunny | 3 to 10 mph W | 9% |
| Sunday Night | 37°F | Partly Cloudy | 6 mph W | 4% |
| Monday | 59°F | Sunny | 3 to 9 mph WSW | 3% |
| Monday Night | 40°F | Mostly Clear | 5 mph WSW | 1% |
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 Nov 3, 2026.