St. Mary, KY Weather & Growing Conditions
Today
94°F
Sunny
Sunny, with a high near 94. Heat index values as high as 101. South wind around 3 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 94°F | Sunny | 3 mph S | 11% |
| Tonight | 70°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 3 mph S | 18% |
| Sunday | 94°F | Mostly Sunny | 3 to 7 mph SW | 3% |
| Sunday Night | 68°F | Partly Cloudy | 5 mph SE | 12% |
| Monday | 88°F | Partly Sunny then Chance Showers And Thunderstorms | 5 mph NE | 39% |
| Monday Night | 62°F | Chance Showers And Thunderstorms | 2 to 6 mph NE | 51% |
| Tuesday | 79°F | Chance Rain Showers then Chance Showers And Thunderstorms | 6 mph NE | 45% |
| Tuesday Night | 60°F | Chance Showers And Thunderstorms | 2 to 6 mph N | 47% |
| Wednesday | 77°F | Chance Rain Showers | 5 mph N | 47% |
| Wednesday Night | 57°F | Chance Showers And Thunderstorms then Partly Cloudy | 1 to 5 mph N | 35% |
| Thursday | 76°F | Mostly Sunny | 1 to 6 mph N | 10% |
| Thursday Night | 56°F | Partly Cloudy | 1 to 6 mph N | 10% |
| Friday | 75°F | Mostly Sunny | 1 to 6 mph N | 5% |
| Friday Night | 54°F | Partly Cloudy | 2 to 6 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. Mary, KY
Last spring frost
Apr 22
First fall frost
Oct 20
Growing season
180 days
Hardiness zone
7a
Explore more for St. Mary, KY: full frost dates · planting calendar · Kentucky frost dates
Climate data from the nearest NOAA station, Bradfordsville, Ky (11.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.