Petersburg, KY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Petersburg, a community in Boone County, Kentucky.
Today
67°F
Rain
Rain and a slight chance of thunderstorms. Cloudy, with a high near 67. South wind 8 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast for Petersburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 67°F | Rain | 8 to 13 mph S | 99% |
| Tonight | 48°F | Mostly Cloudy | 3 to 7 mph SW | 12% |
| Thursday | 65°F | Mostly Sunny | 3 to 9 mph SW | 0% |
| Thursday Night | 43°F | Partly Cloudy | 1 to 5 mph SW | 0% |
| Friday | 59°F | Partly Sunny | 1 to 8 mph NW | 14% |
| Friday Night | 36°F | Mostly Cloudy | 3 to 7 mph NW | 14% |
| Saturday | 55°F | Mostly Sunny | 6 mph NW | 0% |
| Saturday Night | 32°F | Partly Cloudy | 3 mph NW | 0% |
| Sunday | 57°F | Sunny | 1 to 7 mph W | 1% |
| Sunday Night | 32°F | Mostly Clear | 5 mph W | 2% |
| Monday | 61°F | Sunny | 1 to 6 mph SW | 2% |
| Monday Night | 35°F | Mostly Clear | 5 mph SW | 1% |
| Tuesday | 65°F | Sunny | 6 mph SW | 1% |
| Tuesday Night | 35°F | Mostly Clear | 0 to 3 mph NW | 1% |
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.