Issaquah Weather in August

With daytime temperatures of 24°C (75°F) and nighttime lows of 13°C (55°F), August in Issaquah brings high temperatures during the day. The excellent weather makes it an appealing time to visit.

Rainfall in Issaquah in August

You can expect rain on roughly 7 days based on historical data, averaging 39 mm (1.5 in) for the month. Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.

Temperature in Issaquah in August

Issaquah in August is worth a visit. The temperature is excellent, with 24°C (75°F) during the day and 13°C (55°F) at night. Experience the summer season in August. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights drop to around 13°C (55°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in Issaquah in August

Expect a lot of sunshine this month, with about 280 hours of sun. These sunny conditions add to the overall experience.

Wind Speed in Issaquah in August

Wind speeds average 4 m/s (8 knots) during August. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.

If you're a fan of comfortable temperatures and drier conditions, August is a great time to visit.

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For a detailed overview over the year and the best time to visit the United States of America, check out our Issaquah's climate page.

Issaquah Temperature in August

Min Temperature 13°C (55°F)  

Max Temperature 24°C (75°F)  

Chance of Rain 23%  

Precipitation 39 mm (1.5 in)  

Rainy days 7 days  

Humidity 68% *  

Windspeed 4 m/s (8 knots) *  

Sunshine 280 hours *  

Percentage Sunshine 64% *  

* Data from: Seattle, the United States of America (21 KM, 13 Miles).

What to Wear in Issaquah in August

For Issaquah in August, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Some rain is possible, so pack something to handle light showers. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Issaquah in August

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

10/10

Cycling

10/10

Walking

10/10

Barbeque

9/10

Camping

10/10

Outdoor sports

10/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Issaquah's climate page.

More climate data for Issaquah

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Issaquah climate overview or explore weather in the United States of America.