Grand Lake Weather Forecast
- 69
- 94
Becoming Sunny
- 69
- 93
Slight Chance Thunderstorms
- 70
- 94
Slight Chance Thunderstorms
- 71
- 95
Mostly Sunny
- 70
- 96
Chance Rain Showers
- 66
- 94
Chance Thunderstorms
- 65
- 89
Slight Chance Thunderstorms
Today 17 Sep Stephens
Partly sunny. Highs in the mid 90s. South Winds around 5 Mph.
Tonight 17 Sep Stephens
Partly cloudy in the Evening, then becoming mostly clear. Lows in the upper 60s. South Winds around 5 Mph.
Grand Lake Temperature Statistics
September Temperature
Stephens County Airport (3.1 miles)
Lowest 6 September, 2025
61.3 °FAverage September
80.4 °FHighest 4 September, 2025
104.5 °F
Climate (2020–Present)
Stephens County Airport (3.1 miles)
Average Low 2020–2025
56.1 °FAverage 2020–2025
67.7 °FAverage High 2020–2025
79.9 °F