Grant Lake Weather Forecast
- 61
- 81
Mostly Cloudy
- 61
- 81
Mostly Cloudy
- 61
- 83
Partly Sunny
- 59
- 81
Partly Sunny
- 60
- 80
Partly Sunny
- 61
- 81
Partly Sunny
Today 15 Aug Okanogan Valley
Mostly cloudy. Haze and patchy smoke. A chance of Showers and Thunderstorms in the afternoon. Highs in the 80s. Chance of precipitation 50 percent. Rainfall Amounts less than a tenth of an Inch, except higher Amounts possible in Thunderstorms.
Tonight 15 Aug Okanogan Valley
Mostly cloudy. A chance of Showers and Thunderstorms in the Evening, then a chance of rain Showers overnight. Haze and patchy smoke. Lows in the upper 50s to lower 60s. Gusts up to 30 Mph in the evening. Chance of precipitation 50 percent. Rainfall Amounts less than a tenth of an Inch, except higher Amounts possible in Thunderstorms.
Grant Lake Temperature Statistics
August Temperature
Omak Airport (25.5 miles)
Lowest 3 August, 2026
50.6 °FAverage August
73.1 °FHighest 6 August, 2026
95.6 °F
Climate (2021–2026)
Omak Airport (25.5 miles)
Average Low 2021–2026
40.7 °FAverage 2021–2026
51.8 °FAverage High 2021–2026
62.9 °F