Petersburg, KY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Petersburg, a community in Boone County, Kentucky.
This Afternoon
89°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Some of the storms could produce heavy rain. Mostly cloudy, with a high near 89. West wind around 7 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast for Petersburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 89°F | Showers And Thunderstorms Likely | 7 mph W | 66% |
| Tonight | 69°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 6 mph S | 71% |
| Sunday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 3 to 9 mph SW | 25% |
| Sunday Night | 62°F | Chance Showers And Thunderstorms | 9 mph N | 54% |
| Monday | 75°F | Chance Showers And Thunderstorms | 7 to 10 mph NE | 54% |
| Monday Night | 56°F | Chance Showers And Thunderstorms | 6 to 10 mph NE | 54% |
| Tuesday | 74°F | Chance Rain Showers | 7 mph NE | 36% |
| Tuesday Night | 59°F | Chance Rain Showers | 3 to 9 mph NE | 45% |
| Wednesday | 73°F | Chance Showers And Thunderstorms | 6 mph NE | 52% |
| Wednesday Night | 57°F | Chance Showers And Thunderstorms | 2 to 6 mph NE | 52% |
| Thursday | 73°F | Partly Sunny | 6 mph N | 13% |
| Thursday Night | 56°F | Mostly Cloudy | 2 to 6 mph N | 12% |
| Friday | 74°F | Mostly Sunny | 2 to 7 mph NE | 6% |
| Friday Night | 53°F | Partly Cloudy | 6 mph NE | 6% |
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 Sep 20, 2026.