Grayson County Airport Weather Forecast
- 51
- 77
Sunny
- 57
- 79
Mostly Sunny
- 64
- 78
Chance Thunderstorms
- 60
- 78
Rain Showers
- 57
- 72
Rain Showers Likely
- 59
- 74
Partly Sunny
Today 21 Oct Grayson
Sunny, cooler with Highs in the upper 70s. North Winds 5 to 10 Mph.
Tonight 21 Oct Grayson
Mostly clear. Lows in the mid 50s. Northeast Winds 10 to 15 Mph.
Grayson County Airport Temperature Statistics
October Temperature
Sherman/Denison, Grayson County Airport (0 miles)
Lowest 16 October, 2025
58.3 °FAverage October
73.9 °FHighest 12 October, 2025
90 °F
Climate (2020–Present)
Sherman/Denison, Grayson County Airport (0 miles)
Average Low 2020–2025
55.3 °FAverage 2020–2025
64 °FAverage High 2020–2025
76.2 °F