Sun Valley, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sun Valley, a city in Lamar County, Texas.
Tonight
49°F
Mostly Clear
Mostly clear. Low around 49, with temperatures rising to around 51 overnight. Northwest wind around 5 mph.
7-day forecast for Sun Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 49°F | Mostly Clear | 5 mph NW | 0% |
| Wednesday | 70°F | Sunny | 0 to 5 mph NW | 0% |
| Wednesday Night | 45°F | Patchy Fog | 0 mph | 0% |
| Thursday | 74°F | Patchy Fog then Mostly Sunny | 0 to 5 mph S | 3% |
| Thursday Night | 49°F | Partly Cloudy | 5 to 10 mph NW | 13% |
| Friday | 69°F | Sunny | 10 mph NNW | 0% |
| Friday Night | 43°F | Partly Cloudy | 5 to 10 mph N | 0% |
| Saturday | 66°F | Mostly Sunny | 5 mph N | 0% |
| Saturday Night | 42°F | Partly Cloudy | 5 mph NNW | 5% |
| Sunday | 69°F | Sunny | 5 mph NNW | 4% |
| Sunday Night | 40°F | Clear | 0 to 5 mph NW | 1% |
| Monday | 71°F | Sunny | 0 to 5 mph WSW | 1% |
| Monday Night | 42°F | Mostly Clear | 0 to 5 mph S | 1% |
| Tuesday | 74°F | Sunny | 0 to 5 mph S | 1% |
Forecast source: National Weather Service (api.weather.gov) for Sun Valley (33.671, -95.429). Updated through the day.
Growing snapshot for Sun Valley
Last spring frost
Mar 14
First fall frost
Nov 16
Growing season
247 days
Hardiness zone
8b
More local growing data for Sun Valley: nearby ZIP 75462 weather · frost dates · planting calendar · Texas frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Paris, Tx (5.2 mi from Sun Valley). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.