Altha, FL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Altha, a town in Calhoun County, Florida.
Today
91°F
Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 1pm. Sunny. High near 91, with temperatures falling to around 86 in the afternoon. Heat index values as high as 101. West wind 0 to 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Altha
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 91°F | Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 31% |
| Tonight | 72°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph SSW | 16% |
| Wednesday | 92°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SSW | 45% |
| Wednesday Night | 72°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph S | 24% |
| Thursday | 91°F | Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SE | 29% |
| Thursday Night | 72°F | Chance Showers And Thunderstorms | 0 mph | 29% |
| Friday | 91°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph E | 32% |
| Friday Night | 72°F | Chance Showers And Thunderstorms | 0 to 5 mph E | 32% |
| Saturday | 91°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph ESE | 48% |
| Saturday Night | 73°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 48% |
| Sunday | 91°F | Showers And Thunderstorms Likely | 0 to 5 mph SE | 70% |
| Sunday Night | 73°F | Showers And Thunderstorms Likely | 0 to 5 mph S | 70% |
| Monday | 91°F | Showers And Thunderstorms Likely | 0 mph | 55% |
| Monday Night | 74°F | Showers And Thunderstorms Likely | 0 mph | 55% |
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 Aug 4, 2026.