When to go · Mercer Island
Mercer Island in August
Great month. Inside Mercer Island's best window: Apr–Oct.
Key facts
- Verdict
- Great
- Temperature
- 25°C (77°F)77°F (25°C) / 14°C (57°F)57°F (14°C)
- average high / low
- Rain days
- 5
- Crowds
- High
- United States overall
- Prices
- High
- United States overall
Verdict
Inside Mercer Island's best window: Apr–Oct.
Is another month better than August?
No other month rates higher than August for Mercer Island in this guide.
Weather in August
- Mercer IslandHighs around 25 °C (77 °F), lows around 14 °C (57 °F), rain on about 5 daysHighs around 77 °F (25 °C), lows around 57 °F (14 °C), rain on about 5 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 Mercer Island, side by side.
Verdict
Aug: Great
Apr: Great
Daytime high
Aug: 25 °C (77 °F)77 °F (25 °C)
Apr: 15 °C (59 °F)59 °F (15 °C)
Night low
Aug: 14 °C (57 °F)57 °F (14 °C)
Apr: 6 °C (43 °F)43 °F (6 °C)
Rain days
Aug: 5 (better)
Apr: 7
Crowds
Aug: High
Apr: Medium
Prices
Aug: High
Apr: Medium
Festivals listed
Aug: 0
Apr: 1
August: Inside Mercer Island's best window: Apr–Oct.
April: Inside Mercer Island's best window: Apr–Oct.
Mercer Island: figures are long-term averages from this guide, not a forecast.
What to pack
Nothing unusual for the weather this month.