30YearWeather
Seattle in August
Seattle weather in August - United States
😊Warm & Pleasant

Seattle Weather in August

Plan your August trip to Seattle, United States. Based on 30 years of NASA data, expect temperatures of 24°C (high) to 14°C (low), with 11% rain probability and 8 hours of daily sunshine. Great conditions with only 0 rainy days expected.

Avg High
24°C

Hottest around day 1

Avg Low
14°C

Coolest around day 31

Rainy Days
0days

11% avg rain chance

Sunshine
8hrs/day

Summer season

Seattle August Weather Calendar

Click any day to see detailed weather information

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

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.

Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Major Hub
87/ 100
Traffic Index

Extremely busy airport

Peak Daily Arrivals

0

slots per day

Peak

May

Low

Nov

Monthly Traffic Distribution

508
Jan
533
Feb
558
Mar
595
Apr
740
May
696
Jun
707
Jul
713
Aug
675
Sep
584
Oct
498
Nov
575
Dec
Traffic Level
Low Season

Key Connections

Phoenix Sky Harbor (PHX)
Los Angeles (LAX)
San Francisco (SFO)
Anchorage Ted Stevens (ANC)
Denver (DEN)

Health & Safety Advisory

CDC travel health recommendations

No Requirements

No Special Vaccinations Required

Standard travel precautions apply

Source: CDC Travelers' Health

View Complete Health Guide

Is August a Good Time to Visit Seattle?

👍Very good conditions overall
Short Answer

Popular August in Seattle offers 24°C and 11% rain chance - excellent conditions that attract maximum visitors. Book 3-6 months ahead for best rates.

Decision Factors

Peak tourist season

96% of annual peak - expect crowds and peak prices

Ideal temperature range

24.3°C - perfect for sightseeing and outdoor activities

Excellent dry conditions

Only 11% rain probability - ideal for outdoor activities

Near active volcano: Mount Rainier

Medium volcanic risk

Plenty of sunshine

11.2h of sunshine daily

Good For

  • 👨‍👩‍👧‍👦
    Families with children

    Comfortable 24.3°C temperatures and low 11% rain risk

  • 👴
    Elderly travelers

    Comfortable 24.3°C temperature range with manageable humidity

  • 🥾
    Outdoor enthusiasts

    Ideal hiking conditions: 24.3°C, 11% rain chance

  • 📸
    Photographers

    11.2h sunshine, 55% clear skies for golden hour shots

  • 🏛️
    Cultural tourists

    Comfortable conditions for exploring museums and sites

Who Should Avoid

  • 🏖️
    Beach lovers

    Sea temperature only undefined°C - too cold for comfortable swimming

  • 💰
    Budget travelers

    Peak season means premium prices everywhere

930 observations30-year historical data
Confidence: 95%

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Seattle in August averages 24°C with 11% precipitation probability."

📊 Source: 30YearWeather.com🛰️ Data: NASA POWER (1991-2021)View Methodology →

Frequently Asked Questions: Seattle in August

What are the temperatures in Seattle in August?

Daytime highs average 24°C, nights drop to 14°C. Temperatures remain fairly consistent.

How many rainy days in Seattle in August?

Expect around 0 days with measurable rainfall. Rain is unlikely to disrupt plans.

What to wear in Seattle in August?

Comfortable casual wear with a light jacket for evenings.

Is August peak season in Seattle?

This is typically peak season with higher prices. Book 2-3 months ahead.