Havana, IL Weather & Growing Conditions
Tonight
71°F
Partly Cloudy
Partly cloudy, with a low around 71. East southeast wind around 7 mph, with gusts as high as 16 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 71°F | Partly Cloudy | 7 mph ESE | 10% |
| Saturday | 90°F | Mostly Cloudy | 7 mph SSW | 13% |
| Saturday Night | 68°F | Slight Chance Showers And Thunderstorms | 6 mph SSE | 48% |
| Sunday | 80°F | Rain Showers Likely | 1 to 8 mph N | 66% |
| Sunday Night | 59°F | Showers And Thunderstorms Likely | 9 mph NE | 67% |
| Monday | 68°F | Showers And Thunderstorms Likely | 9 mph NE | 67% |
| Monday Night | 54°F | Chance Showers And Thunderstorms | 6 to 9 mph NE | 44% |
| Tuesday | 66°F | Chance Rain Showers | 9 mph NE | 32% |
| Tuesday Night | 51°F | Mostly Cloudy | 3 to 7 mph NNE | 5% |
| Wednesday | 70°F | Mostly Sunny | 3 to 7 mph NNE | 3% |
| Wednesday Night | 53°F | Partly Cloudy | 1 to 5 mph NNE | 1% |
| Thursday | 71°F | Mostly Sunny | 1 to 5 mph NNE | 4% |
| Thursday Night | 55°F | Partly Cloudy | 3 mph NNE | 4% |
| Friday | 73°F | Mostly Sunny | 1 to 5 mph NE | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Havana, IL
Last spring frost
Apr 17
First fall frost
Oct 19
Growing season
185 days
Hardiness zone
6a
Explore more for Havana, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Havana, Il (1.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.