Petersburg, KY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Petersburg, a community in Boone County, Kentucky.
This Afternoon
84°F
Sunny
Sunny, with a high near 84. North wind around 3 mph.
7-day forecast for Petersburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 84°F | Sunny | 3 mph N | 0% |
| Tonight | 64°F | Mostly Clear | 2 mph N | 1% |
| Wednesday | 87°F | Sunny then Slight Chance Showers And Thunderstorms | 2 mph NW | 15% |
| Wednesday Night | 67°F | Mostly Clear | 2 mph W | 3% |
| Thursday | 87°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 1 to 6 mph SW | 23% |
| Thursday Night | 69°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 3 mph S | 59% |
| Friday | 85°F | Showers And Thunderstorms Likely | 2 to 6 mph SW | 66% |
| Friday Night | 67°F | Showers And Thunderstorms Likely | 3 mph SW | 66% |
| Saturday | 85°F | Chance Showers And Thunderstorms | 1 to 6 mph SW | 36% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms then Partly Cloudy | 3 mph SW | 32% |
| Sunday | 87°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 1 to 6 mph SW | 15% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 3 mph SW | 15% |
| Monday | 89°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 to 7 mph SW | 21% |
| Monday Night | 71°F | Chance Showers And Thunderstorms | 5 mph SW | 27% |
Forecast source: National Weather Service (api.weather.gov) for Petersburg (39.048, -84.854). Updated through the day.
Growing snapshot for Petersburg
Last spring frost
Apr 13
First fall frost
Oct 31
Growing season
197 days
Hardiness zone
6b
More local growing data for Petersburg: nearby ZIP 41080 weather · frost dates · planting calendar · Kentucky frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Cincinnati-Fernbank, Oh (8.1 mi from Petersburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.