Cynthiana, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cynthiana, a town in Gibson County, Indiana.
Today
99°F
Sunny
Sunny. High near 99, with temperatures falling to around 95 in the afternoon. Southwest wind 2 to 7 mph.
7-day forecast for Cynthiana
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 99°F | Sunny | 2 to 7 mph SW | 10% |
| Tonight | 73°F | Partly Cloudy | 5 mph SSW | 6% |
| Sunday | 97°F | Sunny | 3 to 8 mph WSW | 5% |
| Sunday Night | 69°F | Partly Cloudy then Chance Showers And Thunderstorms | 7 mph NNE | 37% |
| Monday | 85°F | Showers And Thunderstorms Likely | 6 to 10 mph NE | 60% |
| Monday Night | 61°F | Showers And Thunderstorms Likely | 7 to 12 mph NNE | 60% |
| Tuesday | 77°F | Chance Showers And Thunderstorms | 8 to 12 mph NNE | 27% |
| Tuesday Night | 58°F | Mostly Cloudy | 5 to 12 mph N | 12% |
| Wednesday | 76°F | Mostly Sunny | 5 to 10 mph N | 4% |
| Wednesday Night | 57°F | Partly Cloudy | 3 to 10 mph N | 3% |
| Thursday | 77°F | Mostly Sunny | 3 to 9 mph N | 2% |
| Thursday Night | 58°F | Partly Cloudy | 3 to 9 mph NNE | 2% |
| Friday | 78°F | Mostly Sunny | 3 to 9 mph NNE | 3% |
| Friday Night | 57°F | Partly Cloudy | 3 to 8 mph NE | 1% |
Forecast source: National Weather Service (api.weather.gov) for Cynthiana (38.187, -87.709). Updated through the day.
Growing snapshot for Cynthiana
Last spring frost
Apr 13
First fall frost
Oct 25
Growing season
194 days
Hardiness zone
7a
More local growing data for Cynthiana: nearby ZIP 47612 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Buckskin
Decker
Fort Branch
Francisco
Griffin
Haubstadt
Hazleton
Johnson
Mackey
Oakland City
Owensville
Patoka
Princeton
Somerville
Climate data from the nearest NOAA station, Princeton 1 W, In (12.7 mi from Cynthiana). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.