Mount Summit, IN Weather & Growing Conditions
Tonight
61°F
Partly Cloudy
Partly cloudy. Low around 61, with temperatures rising to around 63 overnight. East wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 61°F | Partly Cloudy | 7 mph E | 7% |
| Saturday | 82°F | Isolated Showers And Thunderstorms then Chance Showers And Thunderstorms | 6 to 9 mph SSE | 71% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms | 7 mph S | 66% |
| Sunday | 83°F | Showers And Thunderstorms Likely | 6 mph WSW | 57% |
| Sunday Night | 59°F | Showers And Thunderstorms Likely | 7 to 10 mph NE | 60% |
| Monday | 70°F | Showers And Thunderstorms Likely | 12 mph ENE | 60% |
| Monday Night | 54°F | Chance Showers And Thunderstorms | 9 to 14 mph NE | 49% |
| Tuesday | 68°F | Chance Showers And Thunderstorms | 12 mph NE | 36% |
| Tuesday Night | 55°F | Slight Chance Showers And Thunderstorms | 5 to 13 mph NE | 20% |
| Wednesday | 69°F | Mostly Cloudy | 6 to 9 mph NNE | 13% |
| Wednesday Night | 54°F | Mostly Cloudy | 3 to 9 mph NNE | 13% |
| Thursday | 70°F | Partly Sunny | 7 mph N | 10% |
| Thursday Night | 54°F | Mostly Cloudy | 3 to 7 mph NNE | 10% |
| Friday | 70°F | Partly Sunny | 3 to 8 mph NNE | 5% |
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 Sep 19, 2026.