Weather in Washington in September
Washington, United States averages a high of 25.9°C (78.6°F) and low of 16.9°C (62.4°F) in September, with 9 rain days and 9.2 hours of daily sunshine. Travel score: 83.6/100 (Excellent). The best time to visit Washington is September.
High
26°C79°F
Low
17°C62°F
🌧️
9
rain days
☀️
9.2
hrs/day sunshine
💧
72%
humidity
84— Excellent
September in Washington is warm and occasionally wet — excellent conditions for exploring.
What are the average temperatures in Washington?
How much does it rain in Washington in September?
Washington receives an average of 113.9mm of rainfall across 9 rainy days in September. The annual total is 1110.7mm.
What should I pack for Washington in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 26°C
🧴
Sunscreen SPF 30+
9 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Recommended
🧥
Light rain jacket
Some rainy days expected (9 days)
☔
Umbrella
Be prepared for occasional showers
Traveling to United States in September?
Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.
🏛️ 121 countries·📅 Updated yearly·✈️ Free forever
Compare Washington
Popular comparisons:
How can I plan my trip to Washington?
What other cities are near Washington?
What are other popular cities in United States?
What is the weather like in other months in Washington?
Data based on 1994–2024 averages · Last updated: 2024-12-31