Geneseo, IL Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Geneseo, a city in Henry County, Illinois.

This Afternoon

75°F

Mostly Sunny

Mostly sunny, with a high near 75. Southeast wind around 10 mph, with gusts as high as 20 mph.

7-day forecast for Geneseo

When	Temp	Forecast	Wind	Precip
This Afternoon	75°F	Mostly Sunny	10 mph SE	14%
Tonight	67°F	Mostly Cloudy then Chance Showers And Thunderstorms	10 mph SE	48%
Saturday	82°F	Chance Showers And Thunderstorms then Showers And Thunderstorms Likely	5 to 10 mph S	66%
Saturday Night	65°F	Chance Showers And Thunderstorms then Showers And Thunderstorms	5 to 10 mph N	81%
Sunday	72°F	Showers And Thunderstorms	10 to 15 mph NE	81%
Sunday Night	57°F	Showers And Thunderstorms Likely	15 mph NE	61%
Monday	65°F	Showers And Thunderstorms Likely	15 mph NE	60%
Monday Night	52°F	Chance Rain Showers	10 to 15 mph NE	48%
Tuesday	63°F	Chance Rain Showers	10 to 15 mph NE	43%
Tuesday Night	49°F	Mostly Cloudy	5 to 10 mph NE	4%
Wednesday	67°F	Mostly Sunny	5 to 10 mph NE	3%
Wednesday Night	52°F	Partly Cloudy	5 mph NE	2%
Thursday	69°F	Mostly Sunny	5 mph NE	4%
Thursday Night	54°F	Partly Cloudy	0 to 5 mph NE	6%

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

More local growing data for Geneseo: nearby ZIP 61254 weather · frost dates · planting calendar · Illinois frost dates

Nearby towns & communities

Alpha Andover Annawan Atkinson Bishop Hill Cambridge Cleveland Colona Galva Hooppole Kewanee Lynn Center Ophiem Orion Osco Swedona Woodhull

All Illinois locations ›

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 Sep 18, 2026.