Cynthiana, KY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cynthiana, a city in Harrison County, Kentucky.
This Afternoon
77°F
Sunny
Sunny, with a high near 77. South wind around 10 mph.
7-day forecast for Cynthiana
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 77°F | Sunny | 10 mph S | 1% |
| Tonight | 60°F | Mostly Cloudy then Showers And Thunderstorms | 6 to 9 mph SE | 90% |
| Wednesday | 68°F | Showers And Thunderstorms | 10 to 14 mph S | 100% |
| Wednesday Night | 50°F | Showers And Thunderstorms Likely then Mostly Cloudy | 3 to 9 mph SW | 57% |
| Thursday | 67°F | Mostly Sunny | 3 to 9 mph SW | 0% |
| Thursday Night | 42°F | Partly Cloudy | 3 mph SW | 0% |
| Friday | 64°F | Mostly Sunny | 1 to 7 mph W | 4% |
| Friday Night | 38°F | Mostly Cloudy | 6 mph NW | 10% |
| Saturday | 56°F | Mostly Sunny | 2 to 6 mph NW | 10% |
| Saturday Night | 32°F | Partly Cloudy | 0 to 3 mph NW | 7% |
| Sunday | 58°F | Mostly Sunny | 0 to 6 mph W | 8% |
| Sunday Night | 29°F | Slight Chance Rain Showers | 5 mph W | 15% |
| Monday | 60°F | Sunny | 2 to 7 mph W | 13% |
| Monday Night | 32°F | Mostly Clear | 6 mph SW | 9% |
Forecast source: National Weather Service (api.weather.gov) for Cynthiana (38.383, -84.302). Updated through the day.
Growing snapshot for Cynthiana
Last spring frost
Apr 18
First fall frost
Oct 23
Growing season
188 days
Hardiness zone
6b
More local growing data for Cynthiana: nearby ZIP 41031 weather · frost dates · planting calendar · Kentucky frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Cynthiana, Ky (2.5 mi from Cynthiana). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.