Cynthiana, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cynthiana, a town in Gibson County, Indiana.
Today
86°F
Sunny
Sunny. High near 86, with temperatures falling to around 84 in the afternoon. East northeast wind around 3 mph.
7-day forecast for Cynthiana
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Sunny | 3 mph ENE | 0% |
| Tonight | 65°F | Mostly Clear | 2 mph NE | 0% |
| Wednesday | 88°F | Sunny | 2 mph WSW | 0% |
| Wednesday Night | 69°F | Mostly Clear | 1 mph SSE | 3% |
| Thursday | 88°F | Partly Sunny | 2 to 7 mph SSW | 14% |
| Thursday Night | 71°F | Chance Showers And Thunderstorms | 5 mph S | 49% |
| Friday | 87°F | Chance Showers And Thunderstorms | 2 to 6 mph SSW | 49% |
| Friday Night | 70°F | Chance Showers And Thunderstorms | 2 mph SSW | 35% |
| Saturday | 88°F | Chance Showers And Thunderstorms | 5 mph SSW | 35% |
| Saturday Night | 71°F | Chance Showers And Thunderstorms then Partly Cloudy | 3 mph S | 27% |
| Sunday | 89°F | Mostly Sunny | 3 to 7 mph SSW | 11% |
| Sunday Night | 72°F | Mostly Clear | 6 mph SSW | 11% |
| Monday | 91°F | Sunny | 5 to 8 mph SSW | 9% |
| Monday Night | 74°F | Mostly Clear | 6 mph SSW | 14% |
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 Aug 4, 2026.