August 23 is generally a great time to visit Seattle. While there is a slight chance of rain (16%), showers are usually brief. Expect comfortable 23°C weather. As it's peak season for Seattle, we recommend booking your stay well in advance to secure the best rates.
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Essential Travel Info for Seattle
Currency
USD
$ United States dollar
Language
English
Driving
Right side
Connect
The area code for the City of Seattle is...
Safety
Moderate Safety
GPI: 2.44
Seattle Weather Forecast for August 23
"Mild & Comfortable. Expect average highs of 23.4°C. 16% chance of rain."
What to Wear in Seattle in August
Based on historical data for August 23, Seattle typically experiences temperatures between 13.9°C and 23.4°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (16% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Seattle
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
23.4°C
Daytime Peak
Average Low
13.9°C
Nighttime Low
Feels Like
23.9°C
☀️ Feels accurate
Rain Chance
16%
Avg 0.7mm if it rains
Cloud Cover
51%
Overcast
Pressure
1015.5 hPa
Low volatility
Seattle Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 90% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
05:00 - 10:00
16:00 - 19:00
Type I-II
🔴 21 min to burn
Type III-IV
🟡 32 min to burn
Type V-VI
🟢 53 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
17.4°C
Noticeable
Heat Stress
Low
No heat warning
😊 Best outdoor time:
Any time during daylight hours
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in United States
Flight Traffic
High
96/100 pressure index
Health Advisory
Healthy
Routine only • View Details →
Landing Slots
~713
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Seattle
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:17
☀️ Noon
12:13
🌇 Sunset
19:09
⏱️ Daylight
13h 52m
Wind Speed
13.3 km/h
Gentle breeze
Sunshine
10.4 hrs
Direct Sun (Cloud-free)
Humidity
69%
Slightly humid
Travel Intelligence
Exclusive flight analytics & health data for Seattle
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
Add your home location in settings to see airport details.
Travel Health & Safety in Seattle
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🔴 Very Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Rare minor tremors. Buildings are earthquake-resistant.
Volcanic Activity
Nearest: Mount Rainier
94.3km away
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Seattle on August 23 averages 23.4°C with a 16% precipitation probability. Wedding/Outdoor Event Score: 100/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Seattle Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
Same date (August 23) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Seattle Worth Visiting on August 23?
Planning a trip to Seattle on August 23? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year is characterized by pleasant mild weather averaging 23.4°C with a 16% historical precipitation risk.
✈️ Travel Logistics: Approximately 713 landing slots available daily during this period, indicating peak tourist activity.
📊 Historical Extremes: The hottest August 23 recorded in the last 30 years saw temperatures hit 28.5°C in 2025, while the coldest dropped to 11°C in 2016.