October 15 is generally a great time to visit Seattle. While there is a slight chance of rain (36%), showers are usually brief. Expect comfortable 16°C weather. Seattle is seeing high visitor numbers, so iconic spots may be busier than usual.
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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 October 15
"Mild & Comfortable. Expect average highs of 15.5°C. 36% chance of rain."
What to Wear in Seattle in October
Based on historical data for October 15, Seattle typically experiences temperatures between 8.5°C and 15.5°C. We recommend packing light jacket, long pants, umbrella to stay comfortable. With a 36% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Seattle
Smart Suitcase
- Light Jacket
- Long Pants
- Umbrella
Average High
15.5°C
Daytime Peak
Average Low
8.5°C
Nighttime Low
Feels Like
15.5°C
🌤️ Feels accurate
Rain Chance
36%
Avg 3.1mm if it rains
Cloud Cover
67%
Overcast
Pressure
1017.4 hPa
Medium volatility
Seattle Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 96% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 73 min to burn
Type III-IV
🟡 110 min to burn
Type V-VI
🟢 183 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
12.4°C
Pleasant
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
Busy
79/100 pressure index
Health Advisory
Healthy
Routine only • View Details →
Landing Slots
~584
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Seattle
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:29
☀️ Noon
11:56
🌇 Sunset
17:23
⏱️ Daylight
10h 54m
Wind Speed
14.2 km/h
Gentle breeze
Sunshine
6.7 hrs
Direct Sun (Cloud-free)
Humidity
82%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Seattle
Smart Flight Estimator
Airport-to-Airport Logistics
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Add your home location in settings to see airport details.
Travel Health & Safety in Seattle
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🟡 Busy
Price Level
💰💰 Moderate
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
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 October 15 averages 15.5°C with a 36% precipitation probability. Wedding/Outdoor Event Score: 80/100."
— 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
Better Alternatives Nearby
Consider these dates within ±7 days
October 18
14.9°C • 40% rain
Score
86
October 8
16.5°C • 32% rain
Score
85
October 19
14.7°C • 43% rain
Score
83
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (October 15) in other destinations
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London
United Kingdom
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Netherlands
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🌍 Explore the same date in different destinations around the world
📍 Is Seattle Worth Visiting on October 15?
Planning a trip to Seattle on October 15? 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 15.5°C with a 36% historical precipitation risk.
✈️ Travel Logistics: Approximately 584 landing slots available daily during this period, indicating peak tourist activity.
📊 Historical Extremes: The hottest October 15 recorded in the last 30 years saw temperatures hit 22.8°C in 2022, while the coldest dropped to 4.7°C in 2025.