Galesburg, IL Weather & Growing Conditions
Tonight
52°F
Chance Light Rain
A chance of rain before 4am. Mostly cloudy, with a low around 52. South southwest wind 9 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Chance Light Rain | 9 to 13 mph SSW | 40% |
| Wednesday | 57°F | Slight Chance Rain Showers then Mostly Cloudy | 16 mph SW | 22% |
| Wednesday Night | 45°F | Mostly Cloudy | 9 to 13 mph SW | 8% |
| Thursday | 56°F | Slight Chance Light Rain | 8 to 13 mph W | 24% |
| Thursday Night | 43°F | Chance Light Rain | 5 to 8 mph NW | 30% |
| Friday | 53°F | Mostly Cloudy then Slight Chance Light Rain | 6 to 10 mph N | 15% |
| Friday Night | 35°F | Partly Cloudy | 0 to 5 mph NNW | 1% |
| Saturday | 52°F | Partly Sunny | 0 to 5 mph WNW | 3% |
| Saturday Night | 35°F | Partly Cloudy | 3 mph W | 3% |
| Sunday | 59°F | Sunny | 3 to 8 mph W | 10% |
| Sunday Night | 36°F | Mostly Clear | 5 mph W | 3% |
| Monday | 63°F | Sunny | 3 to 12 mph SW | 1% |
| Monday Night | 41°F | Mostly Clear | 6 mph W | 0% |
| Tuesday | 64°F | Sunny | 6 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Galesburg, IL
Last spring frost
Apr 20
First fall frost
Oct 19
Growing season
180 days
Hardiness zone
5b
Explore more for Galesburg, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Galesburg, Il (0.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.