Andover, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Andover, a village in Henry County, Illinois.
Overnight
62°F
Mostly Clear
Mostly clear. Low around 62, with temperatures rising to around 65 overnight. South wind around 5 mph.
7-day forecast for Andover
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 62°F | Mostly Clear | 5 mph S | 0% |
| Tuesday | 86°F | Mostly Sunny | 5 to 10 mph SW | 2% |
| Tuesday Night | 68°F | Chance Showers And Thunderstorms | 5 mph E | 51% |
| Wednesday | 79°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 5 mph NW | 76% |
| Wednesday Night | 63°F | Showers And Thunderstorms | 0 to 5 mph N | 81% |
| Thursday | 79°F | Slight Chance Showers And Thunderstorms | 5 mph NE | 56% |
| Thursday Night | 62°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph E | 15% |
| Friday | 81°F | Mostly Sunny | 0 to 5 mph S | 11% |
| Friday Night | 65°F | Mostly Clear | 0 to 5 mph S | 11% |
| Saturday | 84°F | Sunny | 5 to 10 mph SW | 8% |
| Saturday Night | 71°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 15% |
| Sunday | 86°F | Slight Chance Showers And Thunderstorms then Sunny | 10 to 15 mph SW | 15% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph S | 32% |
| Monday | 85°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 10 to 15 mph S | 32% |
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 Aug 4, 2026.