Port St. John, FL Weather & Growing Conditions
Today
88°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Partly sunny. High near 88, with temperatures falling to around 83 in the afternoon. East northeast wind 5 to 10 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Chance Showers And Thunderstorms | 5 to 10 mph ENE | 51% |
| Tonight | 74°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph NNE | 21% |
| Sunday | 88°F | Chance Showers And Thunderstorms | 0 to 5 mph NNE | 60% |
| Sunday Night | 73°F | Chance Showers And Thunderstorms | 0 to 5 mph E | 55% |
| Monday | 88°F | Showers And Thunderstorms Likely | 0 to 5 mph NE | 70% |
| Monday Night | 73°F | Showers And Thunderstorms Likely then Mostly Cloudy | 0 to 5 mph ESE | 70% |
| Tuesday | 89°F | Mostly Sunny then Showers And Thunderstorms Likely | 0 to 5 mph SSE | 70% |
| Tuesday Night | 74°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 0 to 5 mph ESE | 70% |
| Wednesday | 88°F | Showers And Thunderstorms | 0 to 5 mph N | 75% |
| Wednesday Night | 74°F | Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 0 to 5 mph NNE | 75% |
| Thursday | 88°F | Showers And Thunderstorms Likely | 5 to 10 mph NNE | 58% |
| Thursday Night | 74°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 0 to 10 mph NNE | 58% |
| Friday | 88°F | Showers And Thunderstorms Likely | 5 to 15 mph NNE | 56% |
| Friday Night | 74°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 5 to 10 mph NNE | 56% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Port St. John, FL
Last spring frost
Jan 25
First fall frost
Jan 13
Growing season
362 days
Hardiness zone
10a
Explore more for Port St. John, FL: full frost dates · planting calendar · Florida frost dates
Climate data from the nearest NOAA station, Titusville, Fl (11.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.