New Haven, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for New Haven, a city in Allen County, Indiana.
This Afternoon
68°F
Scattered Rain Showers
Scattered rain showers. Mostly cloudy, with a high near 68. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 50%.
7-day forecast for New Haven
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Scattered Rain Showers | 15 mph S | 50% |
| Tonight | 48°F | Mostly Cloudy | 5 to 10 mph SW | 10% |
| Thursday | 58°F | Mostly Cloudy | 10 to 15 mph SW | 13% |
| Thursday Night | 43°F | Rain Showers Likely | 5 to 10 mph W | 55% |
| Friday | 52°F | Chance Rain Showers | 5 to 10 mph NW | 28% |
| Friday Night | 35°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NW | 28% |
| Saturday | 52°F | Partly Sunny | 5 to 10 mph NW | 2% |
| Saturday Night | 31°F | Partly Cloudy | 0 to 5 mph W | 0% |
| Sunday | 55°F | Sunny | 5 to 15 mph W | 1% |
| Sunday Night | 34°F | Mostly Clear | 5 to 10 mph W | 1% |
| Monday | 59°F | Sunny | 5 to 10 mph W | 0% |
| Monday Night | 39°F | Mostly Clear | 5 to 10 mph SW | 0% |
| Tuesday | 62°F | Sunny | 5 to 10 mph W | 0% |
| Tuesday Night | 36°F | Mostly Clear | 0 to 5 mph NW | 2% |
Forecast source: National Weather Service (api.weather.gov) for New Haven (41.068, -85.016). Updated through the day.
Growing snapshot for New Haven
Last spring frost
Apr 27
First fall frost
Oct 19
Growing season
174 days
Hardiness zone
6a
More local growing data for New Haven: nearby ZIP 46774 weather · frost dates · planting calendar · Indiana frost dates
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Woodburn
Climate data from the nearest NOAA station, Woodburn 3N, In (8.3 mi from New Haven). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.