Petersburg, KY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Petersburg, a community in Boone County, Kentucky.
This Afternoon
68°F
Rain
Rain. Cloudy, with a high near 68. South wind 8 to 13 mph. Chance of precipitation is 90%. 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 | 68°F | Rain | 8 to 13 mph S | 92% |
| Tonight | 47°F | Slight Chance Light Rain then Mostly Cloudy | 3 to 7 mph SW | 17% |
| Thursday | 65°F | Mostly Sunny | 3 to 10 mph SW | 0% |
| Thursday Night | 42°F | Partly Cloudy | 1 to 5 mph W | 1% |
| Friday | 57°F | Mostly Cloudy | 2 to 8 mph NW | 7% |
| Friday Night | 33°F | Partly Cloudy | 3 to 7 mph NW | 3% |
| Saturday | 54°F | Mostly Sunny | 3 to 7 mph NW | 0% |
| Saturday Night | 30°F | Partly Cloudy | 1 to 5 mph NW | 0% |
| Sunday | 57°F | Sunny | 1 to 6 mph W | 0% |
| Sunday Night | 31°F | Mostly Clear | 1 to 5 mph W | 0% |
| Monday | 62°F | Sunny | 0 to 5 mph W | 0% |
| Monday Night | 34°F | Mostly Clear | 3 mph SW | 0% |
| Tuesday | 65°F | Sunny | 6 mph W | 1% |
| Tuesday Night | 35°F | Mostly Clear | 0 to 3 mph W | 2% |
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 Nov 4, 2026.