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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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
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Monroeville
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 Sep 20, 2026.