New Haven, IL Weather & Growing Conditions
Tonight
58°F
Showers And Thunderstorms
A slight chance of rain showers between 8pm and 9pm, then showers and thunderstorms. Mostly cloudy. Low around 58, with temperatures rising to around 61 overnight. South wind 8 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 100%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 58°F | Showers And Thunderstorms | 8 to 15 mph S | 98% |
| Wednesday | 70°F | Slight Chance Rain Showers then Partly Sunny | 7 to 12 mph SW | 15% |
| Wednesday Night | 44°F | Partly Cloudy | 5 mph WSW | 0% |
| Thursday | 69°F | Sunny | 2 to 8 mph SW | 0% |
| Thursday Night | 44°F | Partly Cloudy | 0 to 3 mph W | 5% |
| Friday | 62°F | Partly Sunny | 2 to 10 mph NW | 6% |
| Friday Night | 39°F | Partly Cloudy | 2 to 8 mph NNW | 2% |
| Saturday | 58°F | Partly Sunny | 2 to 6 mph NNW | 0% |
| Saturday Night | 34°F | Partly Cloudy | 2 mph NW | 2% |
| Sunday | 62°F | Mostly Sunny | 1 to 7 mph W | 6% |
| Sunday Night | 34°F | Mostly Clear | 1 to 5 mph NW | 7% |
| Monday | 65°F | Sunny | 1 to 8 mph WNW | 3% |
| Monday Night | 37°F | Mostly Clear | 2 to 6 mph SW | 0% |
| Tuesday | 69°F | Sunny | 2 to 7 mph WSW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for New Haven, IL
Last spring frost
Apr 5
First fall frost
Oct 31
Growing season
209 days
Hardiness zone
7a
Explore more for New Haven, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Jt Myers Locks & Dam, In (9.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.