Galesburg, IL Weather & Growing Conditions
Overnight
68°F
Mostly Cloudy
Mostly cloudy, with a low around 68. South southeast wind around 7 mph, with gusts as high as 16 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 68°F | Mostly Cloudy | 7 mph SSE | 11% |
| Saturday | 84°F | Chance Showers And Thunderstorms | 8 mph SE | 32% |
| Saturday Night | 67°F | Showers And Thunderstorms Likely | 2 to 6 mph WSW | 89% |
| Sunday | 73°F | Showers And Thunderstorms Likely | 3 to 14 mph NNE | 72% |
| Sunday Night | 58°F | Chance Showers And Thunderstorms | 13 to 16 mph NE | 58% |
| Monday | 64°F | Showers And Thunderstorms Likely | 16 mph ENE | 62% |
| Monday Night | 52°F | Chance Rain Showers | 10 to 14 mph NE | 50% |
| Tuesday | 63°F | Chance Rain Showers | 10 to 14 mph NE | 41% |
| Tuesday Night | 49°F | Partly Cloudy | 6 to 10 mph NNE | 7% |
| Wednesday | 66°F | Mostly Sunny | 9 mph NNE | 2% |
| Wednesday Night | 52°F | Partly Cloudy | 2 to 6 mph NE | 1% |
| Thursday | 69°F | Mostly Sunny | 6 mph NE | 6% |
| Thursday Night | 54°F | Partly Cloudy | 3 mph NE | 4% |
| Friday | 72°F | Mostly Sunny | 3 to 7 mph ENE | 4% |
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 (1.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.