Weather in Rancho Cucamonga in September
Rancho Cucamonga, United States averages a high of 31.4°C (88.5°F) and low of 17.5°C (63.5°F) in September, with 1 rain days and 11.6 hours of daily sunshine. Travel score: 98.3/100 (Excellent). The best time to visit Rancho Cucamonga is August.
High
31°C89°F
Low
18°C64°F
🌧️
1
rain days
☀️
11.6
hrs/day sunshine
💧
53%
humidity
98— Excellent
September in Rancho Cucamonga is hot and dry — excellent conditions for exploring.
What are the average temperatures in Rancho Cucamonga?
How much does it rain in Rancho Cucamonga in September?
Rancho Cucamonga receives an average of 8.5mm of rainfall across 1 rainy days in September. The annual total is 427.9mm.
What should I pack for Rancho Cucamonga in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light, breathable clothing
Hot weather with highs around 31°C
🧢
Sun hat or cap
Protection from intense sun
🧴
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
🎉Visiting United States in September?
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Data based on 1994–2024 averages · Last updated: 2024-12-31