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Pasadena Weather in September
Pasadena, Los Angeles, United States
About Pasadena in September
Pasadena sits at the foot of the San Gabriel Mountains and is a classic inland heat trap — summer highs average 95–100°F, and Santa Ana winds funnel directly out of the mountain canyons above the city.
For detailed monthly temperature and rainfall data for Los Angeles in September, see the Los Angeles September weather guide.