Is September a Good Time to Visit Seattle?
September is Seattle's peak season for good reason: 21°C temperatures and 19% rain probability. But expect crowds (91% of annual maximum) and premium prices.
Decision Factors
Peak tourist season
91% of annual peak - expect crowds and peak prices
Ideal temperature range
20.6°C - perfect for sightseeing and outdoor activities
Near active volcano: Mount Rainier
Medium volcanic risk
Plenty of sunshine
9.3h of sunshine daily
Good For
- 🥾Outdoor enthusiasts
Ideal hiking conditions: 20.6°C, 19% rain chance
- 🏛️Cultural tourists
Comfortable conditions for exploring museums and sites
- 💑Honeymoon couples
Wedding score 97/100 with romantic weather conditions
- 💼Business travelers
Climate-controlled meetings unaffected by weather
Who Should Avoid
- 🏖️Beach lovers
Sea temperature only undefined°C - too cold for comfortable swimming
- 💰Budget travelers
Peak season means premium prices everywhere
- 👴Elderly travelers
76% humidity creates difficult conditions