What September feels like in Los Angeles
In Los Angeles, September brings early autumn. The midday hours are hot; shade and water matter on long walks. The day–night swing is wide (about 13.4°C (24.1°F)): nights stay mild, so mornings and evenings feel very different from midday. Humidity is moderate, so the air feels neither sticky nor dry.
Rain in Los Angeles in September
Dry weather dominates, and an umbrella can mostly stay packed. A rainy day brings about 8.4 mm (0.3 in) on average — steady rain rather than a passing shower. That is lighter than the city's yearly norm of about 10.6 mm per rainy day.
Daylight and sunshine in September
In mid-September, sunrise is at about 6:35 am and sunset at about 7:01 pm (local time) — 12 h 26 min of daylight. Evenings are drawing in — 1 h 2 min less daylight than mid-August. The sun is out for roughly 91% of those daylight hours, so skies are mostly clear.
How September compares to the rest of the year
September is the 3rd warmest month of the year in Los Angeles. Against August, the average high is 1°C (1.8°F) lower, with 3 mm more rain. The cooling trend carries on into October. By October, typical highs are 27.7°C (81.9°F).
Who September suits
- Sightseeing: a good fit — the weather rarely gets in the way of a city walk.
- Parks & outdoor: less ideal — afternoons are too warm to linger outside.
- Beach: less ideal — too many rainy days.
Tips for visiting Los Angeles in September
Versatile Layers
Mornings and evenings are cooler than midday, so dress in layers.
Sun Protection
Sunscreen, a hat and sunglasses; light breathable clothes.
Quick questions
How warm is Los Angeles in September?
Expect around 31.1°C (88°F) in the afternoon and 17.7°C (63.9°F) at night, which most visitors would call hot.
Does it rain a lot in Los Angeles in September?
Hardly — only about 1 rainy days and 8 mm for the whole month.
What should I wear in Los Angeles in September?
Based on the averages: versatile layers and sun protection. Bring something extra for the cooler evenings.
Is September or October better for visiting Los Angeles?
On our 12-month climate ranking, September comes out ahead (#9 of 12 vs #10). October is cooler and has more rainy days.