Andover, IL Weather & Growing Conditions
Today
55°F
Slight Chance Rain Showers
A slight chance of rain showers between 10am and 5pm. Cloudy, with a high near 55. Southwest wind 15 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 55°F | Slight Chance Rain Showers | 15 to 20 mph SW | 23% |
| Tonight | 45°F | Mostly Cloudy | 15 mph SW | 10% |
| Thursday | 56°F | Chance Rain Showers | 10 to 15 mph W | 36% |
| Thursday Night | 41°F | Slight Chance Rain Showers then Mostly Cloudy | 10 mph NW | 23% |
| Friday | 50°F | Partly Sunny | 5 to 15 mph N | 8% |
| Friday Night | 31°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Saturday | 52°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 33°F | Mostly Clear | 0 to 5 mph W | 2% |
| Sunday | 57°F | Sunny | 5 to 10 mph W | 1% |
| Sunday Night | 35°F | Clear | 5 mph W | 1% |
| Monday | 63°F | Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 40°F | Mostly Clear | 5 to 10 mph W | 0% |
| Tuesday | 63°F | Sunny | 5 mph NW | 0% |
| Tuesday Night | 40°F | Partly Cloudy | 0 to 5 mph N | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Andover, IL
Last spring frost
Apr 20
First fall frost
Oct 20
Growing season
180 days
Hardiness zone
5b
Explore more for Andover, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Geneseo, Il (13.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.