Sullivan, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sullivan, a city in Sullivan County, Indiana.
This Afternoon
67°F
Mostly Cloudy
Mostly cloudy. High near 67, with temperatures falling to around 62 in the afternoon. West southwest wind around 12 mph, with gusts as high as 21 mph.
7-day forecast for Sullivan
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Mostly Cloudy | 12 mph WSW | 8% |
| Tonight | 46°F | Mostly Cloudy | 2 to 8 mph WSW | 5% |
| Thursday | 63°F | Mostly Sunny | 5 to 12 mph WSW | 0% |
| Thursday Night | 43°F | Mostly Cloudy | 1 to 6 mph WNW | 6% |
| Friday | 56°F | Mostly Cloudy | 3 to 10 mph NNW | 2% |
| Friday Night | 32°F | Partly Cloudy | 3 to 8 mph NNW | 1% |
| Saturday | 55°F | Sunny | 2 to 6 mph NNW | 0% |
| Saturday Night | 30°F | Mostly Clear | 3 mph NW | 0% |
| Sunday | 59°F | Sunny | 1 to 6 mph WNW | 0% |
| Sunday Night | 32°F | Mostly Clear | 0 to 3 mph NW | 0% |
| Monday | 64°F | Sunny | 0 to 6 mph WSW | 0% |
| Monday Night | 35°F | Clear | 5 mph SW | 0% |
| Tuesday | 65°F | Sunny | 5 mph W | 1% |
| Tuesday Night | 37°F | Mostly Clear | 0 to 3 mph NW | 2% |
Forecast source: National Weather Service (api.weather.gov) for Sullivan (39.097, -87.407). Updated through the day.
Growing snapshot for Sullivan
Last spring frost
Apr 14
First fall frost
Oct 26
Growing season
193 days
Hardiness zone
6b
More local growing data for Sullivan: nearby ZIP 47882 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Carlisle
Cass
Dugger
Fairbanks
Farmersburg
Graysville
Hymera
Merom
New Lebanon
Paxton
Pleasantville
Shelburn
Climate data from the nearest NOAA station, Shakamak Sp, In (10.3 mi from Sullivan). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.