Geneseo, IL Weather & Growing Conditions
Tonight
52°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy. Low around 52, with temperatures rising to around 55 overnight. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Showers And Thunderstorms | 15 mph S | 79% |
| Wednesday | 57°F | Slight Chance Rain Showers then Mostly Cloudy | 15 mph SW | 24% |
| Wednesday Night | 45°F | Mostly Cloudy | 10 to 15 mph SW | 11% |
| Thursday | 56°F | Chance Rain Showers | 10 to 15 mph W | 44% |
| Thursday Night | 42°F | Chance Rain Showers | 5 to 10 mph NW | 28% |
| Friday | 53°F | Partly Sunny | 10 mph N | 13% |
| Friday Night | 34°F | Partly Cloudy | 0 to 5 mph N | 1% |
| Saturday | 53°F | Mostly Sunny | 0 to 5 mph W | 2% |
| Saturday Night | 35°F | Partly Cloudy | 0 to 5 mph W | 4% |
| Sunday | 59°F | Sunny | 5 to 10 mph W | 11% |
| Sunday Night | 35°F | Mostly Clear | 5 mph W | 3% |
| Monday | 63°F | Sunny | 5 to 15 mph SW | 1% |
| Monday Night | 40°F | Mostly Clear | 5 to 10 mph W | 0% |
| Tuesday | 64°F | Sunny | 5 to 10 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Geneseo, IL
Last spring frost
Apr 20
First fall frost
Oct 20
Growing season
180 days
Hardiness zone
5b
Explore more for Geneseo, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Geneseo, Il (1.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.