Mertzon, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mertzon, a city in Irion County, Texas.
This Afternoon
95°F
Partly Sunny
Partly sunny. High near 95, with temperatures falling to around 92 in the afternoon. Southeast wind around 5 mph.
7-day forecast for Mertzon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 95°F | Partly Sunny | 5 mph SE | 1% |
| Tonight | 70°F | Mostly Clear | 5 to 10 mph SSE | 1% |
| Saturday | 96°F | Sunny | 10 mph S | 1% |
| Saturday Night | 70°F | Partly Cloudy | 5 to 10 mph S | 14% |
| Sunday | 96°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 17% |
| Sunday Night | 68°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 mph S | 30% |
| Monday | 95°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 to 10 mph SSE | 19% |
| Monday Night | 67°F | Chance Showers And Thunderstorms | 0 to 10 mph E | 27% |
| Tuesday | 91°F | Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 10 mph E | 30% |
| Tuesday Night | 66°F | Chance Showers And Thunderstorms | 5 to 10 mph E | 30% |
| Wednesday | 91°F | Chance Showers And Thunderstorms then Partly Sunny | 5 to 10 mph ESE | 28% |
| Wednesday Night | 66°F | Partly Cloudy then Slight Chance Rain Showers | 5 to 10 mph ESE | 16% |
| Thursday | 92°F | Slight Chance Rain Showers then Mostly Sunny | 5 to 10 mph SE | 16% |
| Thursday Night | 67°F | Slight Chance Showers And Thunderstorms | 0 to 10 mph SE | 18% |
Forecast source: National Weather Service (api.weather.gov) for Mertzon (31.262, -100.821). Updated through the day.
Growing snapshot for Mertzon
Last spring frost
Apr 1
First fall frost
Nov 4
Growing season
215 days
Hardiness zone
8a
More local growing data for Mertzon: nearby ZIP 76941 weather · frost dates · planting calendar · Texas frost dates
Climate data from the nearest NOAA station, Mertzon 12Nnw, Tx (13.2 mi from Mertzon). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.