Henderson, IL Weather & Growing Conditions
Tonight
52°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy, with a low around 52. South wind 13 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Showers And Thunderstorms | 13 to 17 mph S | 78% |
| Wednesday | 57°F | Slight 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 | 35°F | Partly Cloudy | 1 to 6 mph NNW | 1% |
| Saturday | 52°F | Mostly Sunny | 1 to 5 mph WNW | 3% |
| Saturday Night | 36°F | Partly Cloudy | 3 mph W | 3% |
| Sunday | 58°F | Sunny | 3 to 9 mph W | 11% |
| Sunday Night | 37°F | Mostly Clear | 6 mph W | 3% |
| Monday | 63°F | Sunny | 5 to 13 mph SW | 1% |
| Monday Night | 41°F | Mostly Clear | 7 mph W | 0% |
| Tuesday | 64°F | Sunny | 7 mph NW | 0% |
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 (6.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.