Mammoth Spring, AR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mammoth Spring, a city in Fulton County, Arkansas.
This Afternoon
99°F
Sunny
Sunny, with a high near 99. Heat index values as high as 100. Southwest wind around 7 mph.
7-day forecast for Mammoth Spring
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 99°F | Sunny | 7 mph SW | 0% |
| Tonight | 69°F | Mostly Clear | 1 to 6 mph SW | 0% |
| Sunday | 98°F | Mostly Sunny | 1 to 6 mph SW | 1% |
| Sunday Night | 68°F | Partly Cloudy then Slight Chance Rain Showers | 3 mph W | 18% |
| Monday | 92°F | Chance Rain Showers | 1 to 6 mph N | 40% |
| Monday Night | 62°F | Chance Showers And Thunderstorms then Partly Cloudy | 6 mph N | 40% |
| Tuesday | 83°F | Mostly Sunny | 6 to 9 mph N | 8% |
| Tuesday Night | 56°F | Partly Cloudy | 5 to 10 mph N | 6% |
| Wednesday | 81°F | Sunny | 6 mph N | 1% |
| Wednesday Night | 54°F | Mostly Clear | 5 mph NE | 0% |
| Thursday | 82°F | Mostly Sunny | 5 mph NE | 1% |
| Thursday Night | 57°F | Partly Cloudy | 3 mph NE | 1% |
| Friday | 84°F | Mostly Sunny | 2 to 6 mph NE | 1% |
| Friday Night | 58°F | Partly Cloudy | 5 mph NE | 1% |
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.