Avg High
Washington in August
Verdict
In Washington, August has a distinct summer feel. As the season moves along, the air is cooling down. You can usually expect a warm month that feels variable day to day. The atmosphere is generally hot and tropical, with heavy bursts of rain breaking the heat.
It suits travellers who want straightforward weather for sightseeing and day trips. It is worth having a couple of indoor backups in mind.
Avg Low
Rain
Daylight
14h
What to expect
- Temperature feel - Heat-forward afternoons with evenings that feel distinctly cooler. Direct sun can push it into “hotter than expected” territory.
- Wet weather - Frequent rain spells. Expect damp surfaces and slick paths. You’ll want a proper rain setup rather than a ‘just in case’.
- Sun exposure - 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 - A steady breeze, and you’ll notice sudden bursts, especially near the coast or ridgelines. On the water or higher ground it feels stronger.
August in context
How it compares to the rest of the year in Washington.
Hottest (avg)
#2 / 12
Wettest (avg)
#3 / 12
Daylight Hours
#4 / 12
Windiest (avg)
#12 / 12
Highest UV
#4 / 12
Most Humid
#3 / 12
Temperature
- Daytime high
-
- Nighttime low
-
- Feels like (avg)
-
Sunshine
- Daylight
- 13.6 hours
- UV index (max)
- 8
- Typical sun hours
- 05:22 – 19:00
Rain & Snow
- Total
-
- Rainy days
- 14
- Cloud cover
- 54%
- Snowfall
-
Humidity & Wind
- Humidity (avg)
- 71%
- Wind (avg)
-
- Wind (max gusts)
-
Frequently asked questions
Is August a good time to visit Washington?
Typical August days in Washington reach highs of 30°C (86°F) with nights around 20°C (68°F). It usually feels hot by day and mild after dark. It is among the wetter months, so it is wise to have some indoor backup plans or flexible activities.
What are temperatures like in August?
Daytime temperatures in August typically peak near 30°C (86°F), while nights drop to around 20°C (68°F). Expect hot afternoons and mild evenings.
How much does it rain in August?
Rainfall in August averages 108 mm (4.3 in) across roughly 14 days. Overall it is a quite rainy time of year, so a light rain jacket and waterproof shoes are very handy.
How many hours of daylight are there in August?
You can expect about 14 hours of daylight in August. Sunrise is typically around 05:22 and sunset near 19:00. You get long days with comfortable amounts of daylight.
How strong is the sun in August?
UV levels are often high (around 8). 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 a gentle to moderate breeze is common, but stronger winds are not frequent.