Marathon, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marathon, a community in Brewster County, Texas.
This Afternoon
92°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92. South wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Marathon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 92°F | Chance Showers And Thunderstorms | 5 mph S | 47% |
| Tonight | 66°F | Chance Showers And Thunderstorms | 5 to 10 mph SE | 47% |
| Sunday | 90°F | Chance Showers And Thunderstorms | 5 mph W | 51% |
| Sunday Night | 63°F | Chance Showers And Thunderstorms | 0 to 10 mph S | 51% |
| Monday | 89°F | Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SE | 19% |
| Monday Night | 62°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 10 to 15 mph E | 19% |
| Tuesday | 84°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 10 to 20 mph E | 22% |
| Tuesday Night | 61°F | Slight Chance Showers And Thunderstorms | 15 to 20 mph E | 22% |
| Wednesday | 83°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 15 to 20 mph SE | 20% |
| Wednesday Night | 62°F | Slight Chance Showers And Thunderstorms | 15 to 20 mph SE | 20% |
| Thursday | 83°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 15 to 20 mph SE | 18% |
| Thursday Night | 61°F | Slight Chance Showers And Thunderstorms | 15 to 20 mph E | 18% |
| Friday | 84°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 15 mph SE | 25% |
| Friday Night | 61°F | Slight Chance Showers And Thunderstorms | 5 to 15 mph SE | 20% |
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.