Glen St. Mary, FL Weather & Growing Conditions
Today
92°F
Mostly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 3pm. Mostly sunny. High near 92, with temperatures falling to around 90 in the afternoon. Heat index values as high as 101. Southwest wind 2 to 8 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 92°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 8 mph SW | 29% |
| Tonight | 71°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 1 to 7 mph SW | 23% |
| Wednesday | 94°F | Mostly Sunny then Chance Showers And Thunderstorms | 1 to 7 mph S | 32% |
| Wednesday Night | 71°F | Chance Showers And Thunderstorms | 0 to 6 mph S | 51% |
| Thursday | 94°F | Partly Sunny then Showers And Thunderstorms Likely | 0 to 7 mph E | 62% |
| Thursday Night | 72°F | Showers And Thunderstorms Likely then Partly Cloudy | 0 to 7 mph E | 62% |
| Friday | 94°F | Chance Showers And Thunderstorms | 1 to 12 mph E | 40% |
| Friday Night | 72°F | Chance Showers And Thunderstorms then Partly Cloudy | 1 to 10 mph E | 40% |
| Saturday | 94°F | Showers And Thunderstorms Likely | 1 to 6 mph E | 64% |
| Saturday Night | 72°F | Showers And Thunderstorms Likely | 0 to 6 mph NE | 64% |
| Sunday | 95°F | Mostly Sunny then Showers And Thunderstorms Likely | 0 to 5 mph SE | 57% |
| Sunday Night | 72°F | Showers And Thunderstorms Likely | 0 to 3 mph E | 57% |
| Monday | 96°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 3 mph SW | 38% |
| Monday Night | 73°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 3 mph S | 38% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Glen St. Mary, FL
Last spring frost
Mar 8
First fall frost
Dec 1
Growing season
272 days
Hardiness zone
9a
Explore more for Glen St. Mary, FL: full frost dates · planting calendar · Florida frost dates
Climate data from the nearest NOAA station, Glen St Mary 1 W, Fl (3.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.