Geneseo, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Geneseo, a city in Henry County, Illinois.
This Afternoon
68°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy, with a high near 68. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%.
7-day forecast for Geneseo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Showers And Thunderstorms | 15 mph S | 91% |
| 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% |
Forecast source: National Weather Service (api.weather.gov) for Geneseo (41.451, -90.155). Updated through the day.
Growing snapshot for Geneseo
Last spring frost
Apr 20
First fall frost
Oct 20
Growing season
180 days
Hardiness zone
5b
More local growing data for Geneseo: nearby ZIP 61254 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Geneseo, Il (1.1 mi from Geneseo). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.