Denison, TX Weather & Growing Conditions
Today
100°F
Sunny
Sunny, with a high near 100. Heat index values as high as 102. South southwest wind around 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 100°F | Sunny | 10 mph SSW | 0% |
| Tonight | 76°F | Mostly Clear | 5 to 10 mph S | 0% |
| Sunday | 100°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph S | 25% |
| Sunday Night | 73°F | Chance Showers And Thunderstorms | 0 to 5 mph SSE | 52% |
| Monday | 95°F | Chance Showers And Thunderstorms | 0 to 5 mph WNW | 52% |
| Monday Night | 69°F | Partly Cloudy | 5 mph NNE | 13% |
| Tuesday | 91°F | Mostly Sunny | 5 to 10 mph NNE | 13% |
| Tuesday Night | 66°F | Slight Chance Rain Showers | 5 to 10 mph NNE | 15% |
| Wednesday | 91°F | Mostly Sunny | 5 to 10 mph ENE | 10% |
| Wednesday Night | 67°F | Partly Cloudy | 5 to 10 mph ENE | 4% |
| Thursday | 92°F | Mostly Sunny | 5 mph E | 5% |
| Thursday Night | 68°F | Partly Cloudy | 0 to 5 mph E | 2% |
| Friday | 92°F | Mostly Sunny | 5 mph ESE | 4% |
| Friday Night | 68°F | Partly Cloudy | 5 mph E | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Denison, TX
Last spring frost
Mar 14
First fall frost
Nov 19
Growing season
250 days
Hardiness zone
8a
Explore more for Denison, TX: full frost dates · planting calendar · Texas frost dates
Climate data from the nearest NOAA station, Sherman, Tx (9.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.