Weather in Walnut Creek in September
Walnut Creek, United States averages a high of 27.8°C (82°F) and low of 14.2°C (57.6°F) in September, with 1 rain days and 11.7 hours of daily sunshine. Travel score: 97.4/100 (Excellent). The best time to visit Walnut Creek is September.
High
28°C82°F
Low
14°C58°F
🌧️
1
rain days
☀️
11.7
hrs/day sunshine
💧
65%
humidity
97— Excellent
September in Walnut Creek is warm and dry — ideal for sightseeing and outdoor activities.
What are the average temperatures in Walnut Creek?
How much does it rain in Walnut Creek in September?
Walnut Creek receives an average of 2.5mm of rainfall across 1 rainy days in September. The annual total is 469.8mm.
What should I pack for Walnut Creek in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 28°C
🧴
Sunscreen SPF 30+
12 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Recommended
🧥
Evening jacket or cardigan
Temperature drops 14°C from day to night
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 Walnut Creek
Popular comparisons:
How can I plan my trip to Walnut Creek?
What other cities are near Walnut Creek?
What are other popular cities in United States?
What is the weather like in other months in Walnut Creek?
Data based on 1994–2024 averages · Last updated: 2024-12-31