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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
75°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms. Mostly cloudy, with a high near 75. Southwest wind around 5 mph. Chance of precipitation is 20%.

7-day forecast for New Haven

WhenTempForecastWindPrecip
This Afternoon 75°F Slight Chance Showers And Thunderstorms 5 mph SW 23%
Tonight 65°F Chance Showers And Thunderstorms 0 to 5 mph S 77%
Sunday 75°F Showers And Thunderstorms Likely 5 to 10 mph N 70%
Sunday Night 53°F Chance Showers And Thunderstorms 10 to 15 mph NE 46%
Monday 66°F Chance Rain Showers 10 to 15 mph NE 35%
Monday Night 50°F Slight Chance Rain Showers then Mostly Cloudy 10 to 15 mph NE 18%
Tuesday 64°F Slight Chance Rain Showers 10 to 15 mph NE 23%
Tuesday Night 52°F Chance Rain Showers 10 to 15 mph NE 39%
Wednesday 65°F Chance Rain Showers 10 to 15 mph NE 46%
Wednesday Night 52°F Chance Showers And Thunderstorms 5 to 15 mph NE 46%
Thursday 68°F Partly Sunny 5 to 10 mph NE 9%
Thursday Night 51°F Mostly Cloudy 5 to 10 mph NE 7%
Friday 71°F Partly Sunny 5 to 10 mph NE 6%
Friday Night 49°F Partly Cloudy 0 to 5 mph NE 6%

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

Nearby towns & communities

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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 Sep 20, 2026.