Sullivan, IN Weather & Growing Conditions
Today
85°F
Sunny
Sunny, with a high near 85. East northeast wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Sunny | 2 mph ENE | 0% |
| Tonight | 63°F | Mostly Clear | 2 mph ENE | 0% |
| Wednesday | 86°F | Sunny | 2 mph SSW | 0% |
| Wednesday Night | 67°F | Partly Cloudy | 2 mph S | 6% |
| Thursday | 85°F | Scattered Rain Showers | 2 to 6 mph SSW | 37% |
| Thursday Night | 68°F | Scattered Showers And Thunderstorms | 1 to 5 mph S | 47% |
| Friday | 84°F | Scattered Showers And Thunderstorms | 1 to 6 mph SSW | 35% |
| Friday Night | 68°F | Scattered Showers And Thunderstorms | 1 to 5 mph SSW | 35% |
| Saturday | 86°F | Slight Chance Showers And Thunderstorms | 1 to 5 mph SSW | 24% |
| Saturday Night | 70°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph SSW | 18% |
| Sunday | 88°F | Sunny | 3 to 9 mph SSW | 11% |
| Sunday Night | 72°F | Mostly Clear | 5 to 8 mph SSW | 11% |
| Monday | 89°F | Mostly Sunny | 5 to 9 mph SSW | 14% |
| Monday Night | 72°F | Chance Showers And Thunderstorms | 7 mph SSW | 28% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Sullivan, IN
Last spring frost
Apr 14
First fall frost
Oct 26
Growing season
193 days
Hardiness zone
6b
Explore more for Sullivan, IN: full frost dates · planting calendar · Indiana frost dates
Climate data from the nearest NOAA station, Shakamak Sp, In (10.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.