New Harmony, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for New Harmony, a town in Posey County, Indiana.
This Afternoon
68°F
Partly Sunny
Partly sunny. High near 68, with temperatures falling to around 61 in the afternoon. West wind around 5 mph.
7-day forecast for New Harmony
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Partly Sunny | 5 mph W | 0% |
| Tonight | 48°F | Partly Cloudy | 1 to 6 mph WSW | 0% |
| Thursday | 64°F | Sunny | 3 to 9 mph WSW | 0% |
| Thursday Night | 44°F | Partly Cloudy | 2 mph WNW | 1% |
| Friday | 57°F | Partly Sunny | 2 to 10 mph NNW | 1% |
| Friday Night | 35°F | Mostly Clear | 2 to 8 mph N | 0% |
| Saturday | 54°F | Sunny | 5 mph N | 0% |
| Saturday Night | 32°F | Mostly Clear | 1 mph N | 0% |
| Sunday | 58°F | Sunny | 0 to 5 mph NW | 0% |
| Sunday Night | 34°F | Mostly Clear | 1 mph NW | 0% |
| Monday | 62°F | Sunny | 0 to 3 mph SSW | 0% |
| Monday Night | 37°F | Clear | 1 mph SW | 1% |
| Tuesday | 64°F | Sunny | 3 mph W | 1% |
| Tuesday Night | 39°F | Mostly Clear | 1 mph NW | 3% |
Forecast source: National Weather Service (api.weather.gov) for New Harmony (38.129, -87.931). Updated through the day.
Growing snapshot for New Harmony
Last spring frost
Apr 7
First fall frost
Oct 28
Growing season
202 days
Hardiness zone
7a
More local growing data for New Harmony: nearby ZIP 47631 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Mt Vernon, In (12.5 mi from New Harmony). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.