St. Marks, FL Weather & Growing Conditions
This Afternoon
93°F
Sunny
Sunny, with a high near 93. Heat index values as high as 100. East northeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 93°F | Sunny | 5 mph ENE | 1% |
| Tonight | 73°F | Mostly Clear | 0 mph | 2% |
| Saturday | 94°F | Sunny then Slight Chance Showers And Thunderstorms | 0 mph | 15% |
| Saturday Night | 73°F | Slight Chance Showers And Thunderstorms | 0 mph | 18% |
| Sunday | 92°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 mph | 54% |
| Sunday Night | 73°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 54% |
| Monday | 91°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph E | 52% |
| Monday Night | 72°F | Chance Showers And Thunderstorms | 0 mph | 52% |
| Tuesday | 91°F | Chance Showers And Thunderstorms | 0 to 5 mph E | 51% |
| Tuesday Night | 73°F | Chance Showers And Thunderstorms | 0 mph | 51% |
| Wednesday | 90°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph NE | 30% |
| Wednesday Night | 72°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph NE | 30% |
| Thursday | 89°F | Sunny | 5 to 10 mph NE | 9% |
| Thursday Night | 72°F | Partly Cloudy | 0 to 5 mph NE | 9% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. Marks, FL
Last spring frost
Mar 11
First fall frost
Nov 21
Growing season
255 days
Hardiness zone
9a
Explore more for St. Marks, FL: full frost dates · planting calendar · Florida frost dates
Climate data from the nearest NOAA station, Tallahassee, Fl (17.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.