Weather in Mission Viejo in September
Mission Viejo, United States averages a high of 26.9°C (80.4°F) and low of 17.8°C (64°F) in September, with 1 rain days and 11.5 hours of daily sunshine. Travel score: 95/100 (Excellent). The best time to visit Mission Viejo is August.
High
27°C80°F
Low
18°C64°F
🌧️
1
rain days
☀️
11.5
hrs/day sunshine
💧
73%
humidity
95— Excellent
September in Mission Viejo is warm and dry — ideal for sightseeing and outdoor activities.
What are the average temperatures in Mission Viejo?
How much does it rain in Mission Viejo in September?
Mission Viejo receives an average of 5mm of rainfall across 1 rainy days in September. The annual total is 321.8mm.
What should I pack for Mission Viejo in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 27°C
🧴
Sunscreen SPF 30+
12 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Traveling to United States in September?
Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.
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Data based on 1994–2024 averages · Last updated: 2024-12-31