Mount Summit, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mount Summit, a town in Henry County, Indiana.
This Afternoon
68°F
Chance Light Rain
A chance of rain before 5pm. Cloudy. High near 68, with temperatures falling to around 65 in the afternoon. Southwest wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Mount Summit
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Chance Light Rain | 14 mph SW | 36% |
| Tonight | 46°F | Cloudy | 5 to 12 mph WSW | 8% |
| Thursday | 60°F | Partly Sunny | 7 to 14 mph SW | 1% |
| Thursday Night | 41°F | Chance Light Rain | 3 to 8 mph W | 28% |
| Friday | 53°F | Slight Chance Light Rain | 5 to 12 mph NW | 19% |
| Friday Night | 33°F | Slight Chance Light Rain then Mostly Cloudy | 5 to 9 mph NW | 17% |
| Saturday | 52°F | Mostly Sunny | 5 to 8 mph NW | 0% |
| Saturday Night | 29°F | Partly Cloudy | 1 to 5 mph WNW | 0% |
| Sunday | 55°F | Sunny | 1 to 9 mph W | 1% |
| Sunday Night | 31°F | Mostly Clear | 1 to 6 mph W | 1% |
| Monday | 59°F | Sunny | 1 to 7 mph W | 0% |
| Monday Night | 35°F | Clear | 6 mph WSW | 0% |
| Tuesday | 61°F | Sunny | 7 mph W | 1% |
| Tuesday Night | 35°F | Mostly Clear | 0 to 3 mph NW | 3% |
Forecast source: National Weather Service (api.weather.gov) for Mount Summit (40.004, -85.386). Updated through the day.
Growing snapshot for Mount Summit
Last spring frost
Apr 27
First fall frost
Oct 17
Growing season
173 days
Hardiness zone
6a
More local growing data for Mount Summit: nearby ZIP 47361 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Cadiz
Dunreith
Greensboro
Kennard
Knightstown
Lewisville
Middletown
Millville
Mooreland
New Castle
New Lisbon
Shirley
Spiceland
Springport
Straughn
Sulphur Springs
Westwood
Climate data from the nearest NOAA station, New Castle 3 Sw, In (7.6 mi from Mount Summit). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.