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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

WhenTempForecastWindPrecip
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

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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.