O'Brien, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for O'Brien, a city in Haskell County, Texas.
This Afternoon
99°F
Mostly Sunny
Mostly sunny, with a high near 99. South wind around 10 mph.
7-day forecast for O'Brien
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 99°F | Mostly Sunny | 10 mph S | 1% |
| Tonight | 77°F | Mostly Cloudy | 10 mph S | 5% |
| Sunday | 97°F | Chance Rain Showers then Chance Showers And Thunderstorms | 5 to 10 mph SW | 44% |
| Sunday Night | 68°F | Chance Showers And Thunderstorms | 5 to 10 mph SE | 39% |
| Monday | 91°F | Chance Rain Showers then Mostly Sunny | 5 to 10 mph NE | 35% |
| Monday Night | 66°F | Chance Showers And Thunderstorms | 5 to 10 mph NE | 37% |
| Tuesday | 86°F | Chance Showers And Thunderstorms | 10 mph ENE | 43% |
| Tuesday Night | 65°F | Slight Chance Showers And Thunderstorms | 10 mph E | 15% |
| Wednesday | 88°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph E | 24% |
| Wednesday Night | 67°F | Mostly Cloudy | 5 to 10 mph E | 7% |
| Thursday | 91°F | Partly Sunny | 5 mph SSE | 10% |
| Thursday Night | 69°F | Mostly Cloudy then Slight Chance Rain Showers | 5 to 10 mph ESE | 16% |
| Friday | 91°F | Slight Chance Rain Showers then Partly Sunny | 5 mph SE | 16% |
| Friday Night | 70°F | Slight Chance Rain Showers | 5 to 10 mph ESE | 15% |
Forecast source: National Weather Service (api.weather.gov) for O'Brien (33.380, -99.844). Updated through the day.
Growing snapshot for O'Brien
Last spring frost
Mar 28
First fall frost
Nov 7
Growing season
225 days
Hardiness zone
8a
More local growing data for O'Brien: nearby ZIP 79539 weather · frost dates · planting calendar · Texas frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Haskell, Tx (16.1 mi from O'Brien). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.