United States Seattle Weather in October — Climate Guide
October in Seattle is Mixed
Seattle Weather in October — Quick Answer
As of 2026- Avg temp
- 15° / 8°
- Rainfall
- 90mm · 13 days
- Crowds
- Moderate
As of 2026, Seattle in October averages a high of 15°C and low of 8°C with 90mm of rain over about 13 days. Autumn — high 15°C, low 8°C. Light waterproof jacket + sweater. Daylight saving ends first Sunday of November (clocks back 1h).
October is Mixed for Seattle.
October is the rain return — 13 wet days/month. Mt Rainier closes Paradise road by mid-month. **Halloween in Capitol Hill** (Oct 31) is the legendary LGBTQ+ street party — 50,000+ attendees in costume. Hotel rates moderate. Indoor museums + Pike Place + restaurants are the main activities.
Travel score
Seattle October Weather Stats
Avg High
15°C
Avg Low
8°C
Rainy Days
13
90mm total
Sunshine
4h
Daily avg
Humidity
75%
Comfortable
UV Index
3
Moderate
Wind
13 km/h
Gusts 28
Sea Temp
11°C
Avg water temp
Crowds
Moderate
At attractions
October Sunrise & Sunset
Air Quality
PM2.5
10 μg/m³
PM10
20 μg/m³
Status
Good
Feels-Like Temperature & Wind
Feels like
Daytime
14°C
Nighttime
7°C
Humidity and wind affect how the actual temperature feels.
Wind
13 km/h
Max gust 28 km/h
Activities Recommended for October
October Travel Pros & Cons
Pros
- Hotel rates moderate
- Halloween Capitol Hill (huge street party)
- Foliage at lower elevations
Cons
- Rain returns (13 days)
- Mt Rainier closes mid-month
October Events & Festivals
- Earshot Jazz Festival
- Halloween (Capitol Hill street party)
Seattle in October — Full Picture
October is the rain return — 13 wet days/month. Mt Rainier closes Paradise road by mid-month. **Halloween in Capitol Hill** (Oct 31) is the legendary LGBTQ+ street party — 50,000+ attendees in costume. Hotel rates moderate. Indoor museums + Pike Place + restaurants are the main activities.
What to Wear & What to Pack
Autumn — high 15°C, low 8°C. Light waterproof jacket + sweater. Daylight saving ends first Sunday of November (clocks back 1h).
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
14.3°C
6.7°C
13.3/mo
Summer (Jun·Jul·Aug)
22.7°C
12.3°C
5/mo
Autumn (Sep·Oct·Nov)
Current15.7°C
8°C
13/mo
Winter (Dec·Jan·Feb)
8.7°C
3.3°C
17.3/mo
Seattle Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 8° | 3° | 18d·145mm | 2h | 80% | 1 | Quiet | Low season | |
| 10° | 4° | 16d·110mm | 3h | 78% | 2 | Quiet | Low season | |
| 12° | 5° | 16d·100mm | 4h | 75% | 3 | Moderate | Shoulder | |
| 14° | 6° | 14d·80mm | 5h | 72% | 4 | Moderate | Shoulder | |
| May (Best) | 17° | 9° | 10d·50mm | 7h | 70% | 6 | Busy | Shoulder |
| June (Best) | 20° | 11° | 8d·38mm | 8h | 68% | 7 | Very busy | Peak |
| July (peak month) (Best) | 24° | 13° | 3d·18mm | 10h | 65% | 8 | Very busy | Peak |
| August (Best) | 24° | 13° | 4d·22mm | 9h | 67% | 7 | Very busy | Peak |
| 21° | 11° | 7d·38mm | 7h | 70% | 5 | Busy | Shoulder | |
| 15° | 8° | 13d·90mm | 4h | 75% | 3 | Moderate | Shoulder | |
| 11° | 5° | 19d·175mm | 2h | 80% | 1 | Quiet | Low season | |
| 8° | 3° | 18d·145mm | 2h | 80% | 1 | Busy | Peak |
View Other Months
Seattle October Hotel Picks
Frequently Asked Questions
Is October a good time to visit Seattle?
Seattle in October is Mixed. Tourist crowds are moderate and flight/hotel prices are shoulder.
What's the average temperature in Seattle in October?
Seattle October averages a high of 15°C and a low of 8°C.
Does it rain much in Seattle in October?
Seattle October averages 90mm of rainfall over about 13 rainy days.
What should I wear in Seattle in October?
Autumn — high 15°C, low 8°C. Light waterproof jacket + sweater. Daylight saving ends first Sunday of November (clocks back 1h).
What time are sunrise and sunset in Seattle in October?
Seattle October sunrise is 07:25 and sunset is 18:25, with 11h 00m of daylight.
What's the air quality like in Seattle in October?
Seattle October air quality (AQI) averages 35, rated Good. PM2.5 averages 10μg/m³.
What activities are recommended in Seattle in October?
In October, Seattle is great for Halloween Capitol Hill, Museums (MoPOP, Chihuly), Pike Place.
Is October peak season in Seattle?
Seattle October crowds are moderate and prices are shoulder. You can travel relatively comfortably without long queues.
Best Months to Visit Seattle
View Other Months
Planning a October trip to Seattle?
You've checked the weather — next come the budget and the route.
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.