Grand Coulee Dam Airport Weather Forecast
- 62
- 88
Increasing Clouds
- 65
- 85
Increasing Clouds
- 61
- 79
Chance Rain Showers
- 61
- 85
Chance Rain Showers
- 64
- 91
Sunny
- 62
- 94
Sunny
- 61
- 92
Mostly Sunny
Today 19 Jul Upper Columbia Basin
Partly cloudy. Highs in the mid to upper 80s. Southwest wind 5 to 15 Mph with Gusts up to 25 Mph.
Tonight 19 Jul Upper Columbia Basin
Mostly cloudy. Lows in the mid 50s to lower 60s. West wind 5 to 15 Mph with Gusts up to 25 Mph.
Grand Coulee Dam Airport Temperature Statistics
July Temperature
Omak Airport (42.3 miles)
Lowest 11 July, 2025
52.6 °FAverage July
76.9 °FHighest 13 July, 2025
103.6 °F
Climate (2020–Present)
Omak Airport (42.3 miles)
Average Low 2020–2025
40.6 °FAverage 2020–2025
51.7 °FAverage High 2020–2025
62.7 °F