Avg High
Seattle in August
Verdict
In Seattle, August has a distinct summer feel. As the season moves along, conditions remain fairly consistent. You can usually expect a warm month that feels manageable day to day. Breezes can be part of the character, especially in exposed spots.
Well suited to visitors who prefer a steady feel over dramatic shifts. Wind can make exposed areas feel cooler and more blustery.
Avg Low
Rain
Daylight
14h
What to expect
- Temperature feel - Summer-like warmth with evenings that feel distinctly cooler. The “feels like” is usually in line with the air temperature.
- Wet weather - Changeable skies. It’s often more stop-start than all-day. It’s worth being prepared for occasional rain.
- Midday sun - High UV at midday. Plan big outdoor blocks earlier or later to dodge the peak. It's the kind of sun you notice immediately.
- Exposure - Generally still, and gusts can catch you in exposed spots. Sheltered streets can feel fine, but open areas feel very different.
August in context
How it compares to the rest of the year in Seattle.
Hottest (avg)
#1 / 12
Wettest (avg)
#11 / 12
Daylight Hours
#4 / 12
Windiest (avg)
#12 / 12
Highest UV
#4 / 12
Most Humid
#11 / 12
Temperature
- Daytime high
-
- Nighttime low
-
- Feels like (avg)
-
Sunshine
- Daylight
- 14.2 hours
- UV index (max)
- 7
- Typical sun hours
- 05:06 – 19:18
Rain & Snow
- Total
-
- Rainy days
- 7
- Cloud cover
- 45%
- Snowfall
-
Humidity & Wind
- Humidity (avg)
- 69%
- Wind (avg)
-
- Wind (max gusts)
-
Frequently asked questions
Is August a good time to visit Seattle?
Typical August days in Seattle reach highs of 24°C (75°F) with nights around 14°C (57°F). It usually feels warm by day and cool after dark. It is one of the drier months, which suits outdoor exploring and sightseeing.
What are temperatures like in August?
In August, you can usually expect highs of 24°C (75°F) and lows near 14°C (57°F). That means warm days and cool nights, so pack layers you can add or remove.
How much does it rain in August?
Rainfall in August averages 33 mm (1.3 in) across roughly 7 days. Overall it is a moderately wet time of year, so showers are usually brief rather than all-day downpours.
How many hours of daylight are there in August?
You can expect about 14 hours of daylight in August. Sunrise is typically around 05:06 and sunset near 19:18. You get long days with comfortable amounts of daylight.
How strong is the sun in August?
UV levels are often high (around 7). Regular sunscreen and a hat are recommended.
Is it windy in August?
In August, average wind speeds are around 8 km/h (5 mph), with gusts on the windiest days reaching about 40 km/h (25 mph). On the ground, it is it often feels breezy, especially in more exposed spots or along the coast.