When to go · Grand Coulee
Grand Coulee in August
Great month. Inside Grand Coulee's best window: Jun–Sep.
Key facts
- Verdict
- Great
- Temperature
- 30°C (86°F)86°F (30°C) / 15°C (59°F)59°F (15°C)
- average high / low
- Rain days
- 3
- Crowds
- High
- United States overall
- Prices
- High
- United States overall
Verdict
Inside Grand Coulee's best window: Jun–Sep.
Is another month better than August?
No other month rates higher than August for Grand Coulee in this guide.
Weather in August
- Grand CouleeHighs around 30 °C (86 °F), lows around 15 °C (59 °F), rain on about 3 daysHighs around 86 °F (30 °C), lows around 59 °F (15 °C), rain on about 3 days
Crowds and prices
- Crowds · United States overall
- High
- Prices · United States overall
- High
United States overall: Hot and busy; wildfire smoke in the West, hurricane peak begins in the Southeast.
High-price month: see what to book ahead.
Compare two months
Weather, crowds and prices for any two months in Grand Coulee, side by side.
Verdict
Aug: Great
Jun: Great
Daytime high
Aug: 30 °C (86 °F)86 °F (30 °C)
Jun: 27 °C (81 °F)81 °F (27 °C)
Night low
Aug: 15 °C (59 °F)59 °F (15 °C)
Jun: 13 °C (55 °F)55 °F (13 °C)
Rain days
Aug: 3
Jun: 3
Crowds
Aug: High
Jun: High
Prices
Aug: High
Jun: High
Festivals listed
Aug: 0
Jun: 0
August: Inside Grand Coulee's best window: Jun–Sep.
June: Inside Grand Coulee's best window: Jun–Sep.
Grand Coulee: figures are long-term averages from this guide, not a forecast.
What to pack
- Light, breathable clothes, a sun hat and sunscreen