Mammoth Spring, AR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mammoth Spring, a city in Fulton County, Arkansas.
Tonight
70°F
Clear
Clear. Low around 70, with temperatures rising to around 72 overnight. Heat index values as high as 101. South wind around 3 mph.
7-day forecast for Mammoth Spring
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 70°F | Clear | 3 mph S | 1% |
| Saturday | 99°F | Sunny | 1 to 7 mph SW | 1% |
| Saturday Night | 69°F | Mostly Clear | 5 mph SW | 0% |
| Sunday | 98°F | Mostly Sunny | 1 to 7 mph W | 0% |
| Sunday Night | 69°F | Mostly Cloudy | 3 mph NW | 9% |
| Monday | 92°F | Partly Sunny then Chance Showers And Thunderstorms | 1 to 7 mph N | 47% |
| Monday Night | 62°F | Chance Showers And Thunderstorms | 6 mph N | 47% |
| Tuesday | 84°F | Mostly Sunny | 6 to 9 mph N | 12% |
| Tuesday Night | 56°F | Partly Cloudy | 5 to 10 mph N | 7% |
| Wednesday | 82°F | Sunny | 6 mph N | 1% |
| Wednesday Night | 55°F | Mostly Clear | 5 mph NE | 0% |
| Thursday | 82°F | Sunny | 6 mph NE | 3% |
| Thursday Night | 56°F | Mostly Clear | 5 mph NE | 3% |
| Friday | 82°F | Mostly Sunny | 3 to 7 mph NE | 6% |
Forecast source: National Weather Service (api.weather.gov) for Mammoth Spring (36.492, -91.541). Updated through the day.
Growing snapshot for Mammoth Spring
Last spring frost
Apr 12
First fall frost
Oct 24
Growing season
194 days
Hardiness zone
7a
More local growing data for Mammoth Spring: nearby ZIP 72554 weather · frost dates · planting calendar · Arkansas frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Mammoth Spring, Ar (3.7 mi from Mammoth Spring). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.