Havana, IL Weather & Growing Conditions
Overnight
55°F
Mostly Cloudy
Mostly cloudy, with a low around 55. Southwest wind around 12 mph, with gusts as high as 23 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 55°F | Mostly Cloudy | 12 mph SW | 13% |
| Wednesday | 58°F | Patchy Drizzle | 12 to 15 mph WSW | 10% |
| Wednesday Night | 46°F | Patchy Drizzle then Mostly Cloudy | 12 mph WSW | 10% |
| Thursday | 59°F | Mostly Cloudy then Slight Chance Light Rain | 9 to 13 mph W | 16% |
| Thursday Night | 42°F | Slight Chance Light Rain then Mostly Cloudy | 7 mph NW | 17% |
| Friday | 54°F | Partly Sunny | 9 mph N | 7% |
| Friday Night | 32°F | Partly Cloudy | 0 to 6 mph N | 0% |
| Saturday | 54°F | Sunny | 0 to 3 mph NNW | 0% |
| Saturday Night | 32°F | Mostly Clear | 1 mph WNW | 1% |
| Sunday | 60°F | Sunny | 1 to 6 mph W | 1% |
| Sunday Night | 34°F | Clear | 2 mph W | 1% |
| Monday | 65°F | Sunny | 0 to 6 mph SW | 0% |
| Monday Night | 38°F | Clear | 3 mph WSW | 0% |
| Tuesday | 66°F | Sunny | 3 mph WNW | 0% |
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 Nov 4, 2026.