Galesburg, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Galesburg, a city in Knox County, Illinois.
Today
55°F
Slight Chance Drizzle
A slight chance of drizzle. Cloudy, with a high near 55. West southwest wind around 15 mph, with gusts as high as 23 mph.
7-day forecast for Galesburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 55°F | Slight Chance Drizzle | 15 mph WSW | 10% |
| Tonight | 45°F | Slight Chance Drizzle then Cloudy | 13 mph WSW | 10% |
| Thursday | 55°F | Chance Light Rain | 14 mph W | 26% |
| Thursday Night | 42°F | Slight Chance Light Rain then Mostly Cloudy | 9 mph NW | 22% |
| Friday | 51°F | Partly Sunny | 6 to 10 mph N | 7% |
| Friday Night | 32°F | Partly Cloudy | 0 to 5 mph NNW | 0% |
| Saturday | 52°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 34°F | Mostly Clear | 2 mph W | 1% |
| Sunday | 57°F | Sunny | 2 to 8 mph W | 1% |
| Sunday Night | 35°F | Clear | 3 mph W | 1% |
| Monday | 63°F | Sunny | 1 to 8 mph SW | 0% |
| Monday Night | 40°F | Mostly Clear | 5 mph WSW | 0% |
| Tuesday | 64°F | Sunny | 5 mph NW | 0% |
| Tuesday Night | 41°F | Partly Cloudy | 1 mph N | 0% |
Forecast source: National Weather Service (api.weather.gov) for Galesburg (40.950, -90.377). Updated through the day.
Growing snapshot for Galesburg
Last spring frost
Apr 20
First fall frost
Oct 19
Growing season
180 days
Hardiness zone
5b
More local growing data for Galesburg: nearby ZIP 61401 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Abingdon
Altona
East Galesburg
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Henderson
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Nekoma
Oak Run
Oneida
Rio
St. Augustine
Victoria
Wataga
Williamsfield
Yates City
Climate data from the nearest NOAA station, Galesburg, Il (0.1 mi from Galesburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.