Marathon, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marathon, a community in Brewster County, Texas.
Overnight
65°F
Clear
Clear, with a low around 65. East wind around 5 mph.
7-day forecast for Marathon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 65°F | Clear | 5 mph E | 0% |
| Tuesday | 94°F | Sunny | 0 to 10 mph SE | 0% |
| Tuesday Night | 67°F | Clear | 5 to 20 mph E | 0% |
| Wednesday | 93°F | Sunny | 5 to 10 mph SE | 0% |
| Wednesday Night | 68°F | Mostly Clear | 5 to 15 mph SE | 0% |
| Thursday | 93°F | Sunny | 5 to 15 mph SE | 3% |
| Thursday Night | 68°F | Mostly Clear | 5 to 15 mph SE | 3% |
| Friday | 92°F | Mostly Sunny | 5 to 15 mph SE | 1% |
| Friday Night | 67°F | Partly Cloudy | 5 to 15 mph SE | 1% |
| Saturday | 91°F | Sunny | 5 to 15 mph SE | 2% |
| Saturday Night | 66°F | Mostly Clear | 5 to 15 mph SE | 2% |
| Sunday | 91°F | Sunny | 5 to 15 mph SE | 1% |
| Sunday Night | 66°F | Mostly Clear | 5 to 15 mph SE | 1% |
| Monday | 92°F | Sunny | 5 to 10 mph SE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Marathon (30.221, -103.237). Updated through the day.
Growing snapshot for Marathon
Last spring frost
Apr 7
First fall frost
Nov 1
Growing season
205 days
Hardiness zone
8b
More local growing data for Marathon: nearby ZIP 79842 weather · frost dates · planting calendar · Texas frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Marathon, Tx (19.2 mi from Marathon). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.