Andover, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Andover, a village 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 80%.
7-day forecast for Andover
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Showers And Thunderstorms | 15 mph S | 84% |
| Tonight | 52°F | Showers And Thunderstorms | 15 mph S | 82% |
| Wednesday | 56°F | Chance Rain Showers then Mostly Cloudy | 15 mph SW | 26% |
| Wednesday Night | 44°F | Mostly Cloudy | 15 mph SW | 12% |
| Thursday | 55°F | Chance Rain Showers | 10 to 15 mph W | 34% |
| Thursday Night | 42°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NW | 30% |
| Friday | 52°F | Partly Sunny | 10 to 15 mph N | 13% |
| Friday Night | 34°F | Partly Cloudy | 0 to 5 mph N | 1% |
| Saturday | 52°F | Mostly Sunny | 0 to 5 mph W | 3% |
| Saturday Night | 35°F | Partly Cloudy | 0 to 5 mph W | 4% |
| Sunday | 58°F | Sunny | 5 to 10 mph W | 12% |
| Sunday Night | 36°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 Andover (41.295, -90.291). Updated through the day.
Growing snapshot for Andover
Last spring frost
Apr 20
First fall frost
Oct 20
Growing season
180 days
Hardiness zone
5b
More local growing data for Andover: nearby ZIP 61233 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Geneseo, Il (13.1 mi from Andover). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.