New Haven, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for New Haven, a city in Allen County, Indiana.
Overnight
57°F
Mostly Cloudy
Mostly cloudy, with a low around 57. East wind 5 to 10 mph.
7-day forecast for New Haven
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Mostly Cloudy | 5 to 10 mph E | 6% |
| Saturday | 77°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 to 10 mph E | 76% |
| Saturday Night | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 mph S | 78% |
| Sunday | 74°F | Showers And Thunderstorms | 5 to 10 mph NW | 81% |
| Sunday Night | 53°F | Chance Rain Showers | 10 to 15 mph NE | 53% |
| Monday | 65°F | Chance Rain Showers | 10 to 15 mph NE | 49% |
| Monday Night | 49°F | Slight Chance Rain Showers | 10 to 15 mph NE | 24% |
| Tuesday | 64°F | Mostly Cloudy then Slight Chance Rain Showers | 15 mph NE | 17% |
| Tuesday Night | 51°F | Chance Rain Showers | 10 to 15 mph NE | 44% |
| Wednesday | 64°F | Chance Rain Showers | 10 to 15 mph NE | 44% |
| Wednesday Night | 51°F | Chance Showers And Thunderstorms then Mostly Cloudy | 5 to 10 mph NE | 34% |
| Thursday | 67°F | Mostly Cloudy | 5 to 10 mph NE | 8% |
| Thursday Night | 50°F | Mostly Cloudy | 5 to 10 mph NE | 6% |
| Friday | 70°F | Mostly Sunny | 5 to 10 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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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 19, 2026.