Sullivan, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sullivan, a city in Sullivan County, Indiana.
Overnight
61°F
Patchy Fog
Patchy fog. Mostly clear. Low around 61, with temperatures rising to around 64 overnight. Northeast wind around 2 mph.
7-day forecast for Sullivan
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 61°F | Patchy Fog | 2 mph NE | 0% |
| Tuesday | 84°F | Patchy Fog then Sunny | 2 mph E | 0% |
| Tuesday Night | 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% |
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 Aug 4, 2026.