Denison, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Denison, a city in Grayson County, Texas.
Overnight
52°F
Mostly Clear
Mostly clear. Low around 52, with temperatures rising to around 54 overnight. Northwest wind around 5 mph.
7-day forecast for Denison
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 52°F | Mostly Clear | 5 mph NW | 0% |
| Wednesday | 71°F | Sunny | 0 to 5 mph WNW | 0% |
| Wednesday Night | 50°F | Partly Cloudy then Patchy Fog | 0 to 5 mph S | 0% |
| Thursday | 75°F | Patchy Fog then Mostly Sunny | 5 to 10 mph SSW | 10% |
| Thursday Night | 50°F | Partly Cloudy | 5 to 10 mph NNW | 13% |
| Friday | 69°F | Sunny | 5 to 10 mph N | 0% |
| Friday Night | 46°F | Partly Cloudy | 5 mph N | 0% |
| Saturday | 66°F | Mostly Sunny | 5 mph N | 1% |
| Saturday Night | 46°F | Partly Cloudy | 0 to 5 mph N | 5% |
| Sunday | 69°F | Sunny | 0 to 5 mph NNW | 2% |
| Sunday Night | 45°F | Clear | 0 mph | 1% |
| Monday | 72°F | Sunny | 0 to 5 mph SSW | 1% |
| Monday Night | 48°F | Mostly Clear | 5 mph S | 0% |
| Tuesday | 74°F | Sunny | 5 mph S | 1% |
Forecast source: National Weather Service (api.weather.gov) for Denison (33.767, -96.581). Updated through the day.
Growing snapshot for Denison
Last spring frost
Mar 14
First fall frost
Nov 19
Growing season
250 days
Hardiness zone
8a
More local growing data for Denison: nearby ZIP 75020 weather · frost dates · planting calendar · Texas frost dates
Nearby towns & communities
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Sherman
Sherwood Shores
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Tom Bean
Van Alstyne
Whitesboro
Whitewright
Climate data from the nearest NOAA station, Sherman, Tx (5.2 mi from Denison). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.