Altha, FL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Altha, a town in Calhoun County, Florida.
Tonight
71°F
Mostly Clear
Mostly clear, with a low around 71. West northwest wind around 0 mph.
7-day forecast for Altha
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 71°F | Mostly Clear | 0 mph | 2% |
| Saturday | 94°F | Sunny | 0 to 5 mph NNE | 9% |
| Saturday Night | 72°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 mph | 19% |
| Sunday | 91°F | Mostly Sunny then Showers And Thunderstorms Likely | 0 to 5 mph ENE | 63% |
| Sunday Night | 72°F | Showers And Thunderstorms Likely then Partly Cloudy | 0 mph | 63% |
| Monday | 91°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph ENE | 43% |
| Monday Night | 71°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph ESE | 43% |
| Tuesday | 90°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph ENE | 35% |
| Tuesday Night | 72°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph ENE | 35% |
| Wednesday | 90°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph NE | 24% |
| Wednesday Night | 71°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 to 10 mph NE | 24% |
| Thursday | 88°F | Sunny | 10 to 15 mph NE | 7% |
| Thursday Night | 70°F | Mostly Clear | 5 to 10 mph NE | 7% |
| Friday | 87°F | Sunny | 10 mph NNE | 7% |
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 Sep 19, 2026.