Sun Valley, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sun Valley, a city in Lamar County, Texas.
Today
98°F
Sunny
Sunny, with a high near 98. Heat index values as high as 100. South southeast wind around 5 mph.
7-day forecast for Sun Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 98°F | Sunny | 5 mph SSE | 0% |
| Tonight | 75°F | Mostly Clear | 5 mph SE | 0% |
| Wednesday | 99°F | Sunny | 5 to 10 mph SSW | 1% |
| Wednesday Night | 76°F | Mostly Clear | 5 to 10 mph SSE | 1% |
| Thursday | 96°F | Sunny | 5 to 10 mph SSW | 4% |
| Thursday Night | 76°F | Partly Cloudy | 5 mph SSE | 4% |
| Friday | 95°F | Mostly Sunny | 5 mph S | 12% |
| Friday Night | 74°F | Mostly Clear | 5 mph SSE | 12% |
| Saturday | 94°F | Sunny | 5 mph S | 13% |
| Saturday Night | 74°F | Mostly Clear | 5 mph SSE | 13% |
| Sunday | 95°F | Sunny | 5 mph S | 4% |
| Sunday Night | 75°F | Mostly Clear | 5 to 10 mph SSE | 4% |
| Monday | 95°F | Sunny | 5 to 10 mph S | 6% |
| Monday Night | 75°F | Mostly Clear | 10 mph SSE | 6% |
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 Aug 4, 2026.