Hanover, IL Weather & Growing Conditions
Overnight
64°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 3am, then showers and thunderstorms likely between 3am and 4am, then patchy fog and occasional showers and thunderstorms. Mostly cloudy, with a low around 64. East wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 64°F | Chance Showers And Thunderstorms | 5 to 10 mph E | 83% |
| Saturday | 77°F | Patchy Fog | 5 to 10 mph SE | 97% |
| Saturday Night | 61°F | Showers And Thunderstorms | 5 to 10 mph NE | 85% |
| Sunday | 67°F | Chance Rain Showers | 10 to 15 mph NE | 51% |
| Sunday Night | 55°F | Chance Rain Showers | 10 to 15 mph NE | 33% |
| Monday | 63°F | Chance Rain Showers | 10 to 15 mph NE | 41% |
| Monday Night | 50°F | Chance Rain Showers | 10 mph NE | 27% |
| Tuesday | 62°F | Slight Chance Rain Showers then Partly Sunny | 10 mph NE | 20% |
| Tuesday Night | 47°F | Partly Cloudy | 5 to 10 mph NE | 5% |
| Wednesday | 65°F | Mostly Sunny | 5 to 10 mph NE | 2% |
| Wednesday Night | 50°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Thursday | 66°F | Mostly Sunny | 5 mph NE | 6% |
| Thursday Night | 51°F | Partly Cloudy | 0 to 5 mph NE | 5% |
| Friday | 69°F | Mostly Sunny | 0 to 5 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Hanover, IL
Last spring frost
May 1
First fall frost
Oct 9
Growing season
160 days
Hardiness zone
5a
Explore more for Hanover, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Elizabeth, Il (5.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.