Altha, FL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Altha, a town in Calhoun County, Florida.
Tonight
68°F
Chance Rain Showers
A chance of rain showers before 3am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Altha
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 68°F | Chance Rain Showers | 10 mph SE | 48% |
| Wednesday | 81°F | Chance Showers And Thunderstorms | 5 to 10 mph SSE | 62% |
| Wednesday Night | 66°F | Partly Cloudy | 0 to 5 mph SSE | 6% |
| Thursday | 83°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph S | 35% |
| Thursday Night | 63°F | Partly Cloudy | 0 to 5 mph WSW | 1% |
| Friday | 81°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 27% |
| Friday Night | 54°F | Partly Cloudy | 5 mph NW | 8% |
| Saturday | 78°F | Sunny then Slight Chance Rain Showers | 5 mph N | 15% |
| Saturday Night | 48°F | Partly Cloudy | 5 mph NNW | 6% |
| Sunday | 73°F | Mostly Sunny then Slight Chance Rain Showers | 5 mph NNW | 15% |
| Sunday Night | 45°F | Slight Chance Rain Showers | 5 mph NNW | 15% |
| Monday | 72°F | Sunny | 5 to 10 mph N | 6% |
| Monday Night | 43°F | Mostly Clear | 5 mph N | 2% |
| Tuesday | 75°F | Sunny | 5 mph N | 5% |
Forecast source: National Weather Service (api.weather.gov) for Altha (30.573, -85.126). Updated through the day.
Growing snapshot for Altha
Last spring frost
Mar 1
First fall frost
Nov 27
Growing season
270 days
Hardiness zone
9a
More local growing data for Altha: nearby ZIP 32421 weather · frost dates · planting calendar · Florida frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Marianna Muni Ap, Fl (21.7 mi from Altha). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.