Cynthiana, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cynthiana, a town in Gibson County, Indiana.
This Afternoon
99°F
Sunny
Sunny. High near 99, with temperatures falling to around 97 in the afternoon. West southwest wind around 7 mph.
7-day forecast for Cynthiana
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 99°F | Sunny | 7 mph WSW | 4% |
| Tonight | 73°F | Partly Cloudy | 5 mph SSW | 7% |
| Sunday | 97°F | Mostly Sunny | 5 to 8 mph WSW | 2% |
| Sunday Night | 69°F | Partly Cloudy then Chance Showers And Thunderstorms | 7 mph N | 36% |
| Monday | 86°F | Chance Showers And Thunderstorms | 6 to 9 mph NE | 44% |
| Monday Night | 62°F | Chance Showers And Thunderstorms | 6 to 10 mph NE | 44% |
| Tuesday | 78°F | Chance Showers And Thunderstorms | 6 to 12 mph NNE | 36% |
| Tuesday Night | 59°F | Partly Cloudy | 5 to 12 mph N | 10% |
| Wednesday | 76°F | Mostly Sunny | 5 to 9 mph N | 7% |
| Wednesday Night | 58°F | Partly Cloudy | 2 to 9 mph N | 2% |
| Thursday | 77°F | Mostly Sunny | 3 to 7 mph N | 1% |
| Thursday Night | 59°F | Partly Cloudy | 2 to 7 mph NNE | 1% |
| Friday | 79°F | Partly Sunny | 2 to 8 mph NNE | 4% |
| Friday Night | 58°F | Partly Cloudy | 3 to 7 mph NNE | 4% |
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.