Marathon, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marathon, a community in Brewster County, Texas.
This Afternoon
90°F
Mostly Sunny
Mostly sunny, with a high near 90. Southeast wind around 10 mph.
7-day forecast for Marathon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 90°F | Mostly Sunny | 10 mph SE | 1% |
| Tonight | 65°F | Partly Cloudy | 5 to 15 mph E | 2% |
| Saturday | 93°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SE | 54% |
| Saturday Night | 65°F | Chance Showers And Thunderstorms | 0 to 5 mph NE | 54% |
| Sunday | 91°F | Showers And Thunderstorms Likely | 0 to 5 mph SW | 69% |
| Sunday Night | 63°F | Showers And Thunderstorms Likely | 0 to 5 mph NE | 69% |
| Monday | 89°F | Sunny | 0 to 10 mph E | 13% |
| Monday Night | 63°F | Partly Cloudy | 5 to 10 mph E | 13% |
| Tuesday | 84°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 20 mph E | 23% |
| Tuesday Night | 62°F | Slight Chance Showers And Thunderstorms | 15 to 20 mph E | 23% |
| Wednesday | 84°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 15 to 20 mph SE | 24% |
| Wednesday Night | 62°F | Slight Chance Showers And Thunderstorms | 15 to 20 mph SE | 24% |
| Thursday | 84°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 15 to 20 mph SE | 25% |
| Thursday Night | 62°F | Chance Showers And Thunderstorms | 15 to 20 mph E | 25% |
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 Sep 19, 2026.