Weather in Fountain Valley in September
Fountain Valley, United States averages a high of 25.8°C (78.4°F) and low of 17.6°C (63.7°F) in September, with 1 rain days and 11.5 hours of daily sunshine. Travel score: 93.8/100 (Excellent). The best time to visit Fountain Valley is July.
High
26°C78°F
Low
18°C64°F
🌧️
1
rain days
☀️
11.5
hrs/day sunshine
💧
75%
humidity
94— Excellent
September in Fountain Valley is warm and dry — ideal for sightseeing and outdoor activities.
What are the average temperatures in Fountain Valley?
How much does it rain in Fountain Valley in September?
Fountain Valley receives an average of 6.1mm of rainfall across 1 rainy days in September. The annual total is 295.1mm.
What should I pack for Fountain Valley in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 26°C
🧴
Sunscreen SPF 30+
12 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
🎉Visiting United States in September?
Don't miss any public holidays — check before you book!
Compare Fountain Valley
Popular comparisons:
How can I plan my trip to Fountain Valley?
What other cities are near Fountain Valley?
What are other popular cities in United States?
What is the weather like in other months in Fountain Valley?
Data based on 1994–2024 averages · Last updated: 2024-12-31