Geneseo, IL Weather & Growing Conditions
Today
82°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 11am, then a chance of showers and thunderstorms between 11am and noon, then a slight chance of showers and thunderstorms between noon and 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 82. South wind around 10 mph. Chance of precipitation is 50%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Chance Showers And Thunderstorms | 10 mph S | 51% |
| Tonight | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 to 10 mph W | 92% |
| Sunday | 71°F | Patchy Fog | 10 to 15 mph NE | 73% |
| Sunday Night | 57°F | Chance Showers And Thunderstorms | 15 mph NE | 47% |
| Monday | 64°F | Rain Showers Likely | 15 mph NE | 60% |
| Monday Night | 52°F | Chance Rain Showers | 10 to 15 mph NE | 45% |
| Tuesday | 63°F | Slight Chance Rain Showers | 15 mph NE | 20% |
| Tuesday Night | 49°F | Partly Cloudy | 5 to 15 mph NE | 8% |
| Wednesday | 67°F | Mostly Sunny | 10 mph NE | 2% |
| Wednesday Night | 52°F | Partly Cloudy | 5 to 10 mph NE | 1% |
| Thursday | 68°F | Mostly Sunny | 5 to 10 mph NE | 5% |
| Thursday Night | 53°F | Partly Cloudy | 5 mph NE | 5% |
| Friday | 72°F | Mostly Sunny | 5 to 10 mph NE | 3% |
| Friday Night | 53°F | Partly Cloudy | 5 mph E | 3% |
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 Sep 19, 2026.