Mount Summit, IN Weather & Growing Conditions
Today
82°F
Sunny
Sunny, with a high near 82. East northeast wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Sunny | 1 mph ENE | 0% |
| Tonight | 61°F | Clear | 0 mph | 0% |
| Wednesday | 83°F | Sunny | 0 to 3 mph ESE | 0% |
| Wednesday Night | 64°F | Partly Cloudy | 2 mph SSW | 4% |
| Thursday | 83°F | Mostly Sunny then Scattered Showers And Thunderstorms | 2 to 7 mph SW | 48% |
| Thursday Night | 65°F | Scattered Showers And Thunderstorms | 3 mph SW | 62% |
| Friday | 82°F | Chance Showers And Thunderstorms then Scattered Showers And Thunderstorms | 2 to 6 mph SSW | 62% |
| Friday Night | 65°F | Chance Showers And Thunderstorms | 3 mph SW | 52% |
| Saturday | 83°F | Slight Chance Showers And Thunderstorms | 1 to 6 mph SW | 20% |
| Saturday Night | 66°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 3 mph SSW | 20% |
| Sunday | 85°F | Mostly Sunny | 3 to 9 mph SW | 14% |
| Sunday Night | 69°F | Partly Cloudy | 6 mph SW | 14% |
| Monday | 86°F | Mostly Sunny then Chance Showers And Thunderstorms | 6 to 10 mph SW | 26% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 7 mph SW | 34% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mount Summit, IN
Last spring frost
Apr 27
First fall frost
Oct 17
Growing season
173 days
Hardiness zone
6a
Explore more for Mount Summit, IN: full frost dates · planting calendar · Indiana frost dates
Climate data from the nearest NOAA station, New Castle 3 Sw, In (7.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.