San Diego in September
Autumn in San Diego: expect warm weather with highs of 25°C.
Photo: Sven Pieren / Unsplash
September Weather in San Diego
🌡️
Average High
25°C
❄️
Average Low
18°C
🌧️
Rain Days
2.4
🌤️
Season
Autumn
What to Expect
September in San Diego brings warm weather with daytime highs around 25°C and nighttime lows of 18°C. You can expect approximately 2.4 days of rain during the month. This is shoulder season with moderate crowds. A good balance of decent weather and reasonable prices.
Packing tip: Bring layers for comfortable days and cooler evenings. A light jacket is advisable.
September Costs in San Diego
Budget
USD 100
per day
Mid-Range
USD 250
per day
Luxury
USD 600
per day
Things to Do in San Diego in September
Our Top 5 Favourite Tours in San Diego
Hand-picked guided experiences you can book in advance on GetYourGuide.
San Diego Walking Tour: Highlights & Hidden Gems
Discover San Diego on foot with a local guide who knows every backstreet and story. You will cover the must-see landmarks and stumble upon places most visitors never find.
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San Diego Food Tour: Street Food & Local Favourites
Eat your way through San Diego with a local foodie as your guide. From bustling markets to tucked-away restaurants, taste the dishes the city is truly known for.
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Best of San Diego: Skip-the-Line Top Attractions
Skip the queues and get straight into San Diego's top attractions with pre-booked access. An expert guide brings each site to life with stories and context you would not get on your own.
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Day Trip from San Diego: Scenic Excursion
Escape San Diego for the day and explore the stunning surroundings. Transport, guide, and itinerary are all sorted so you can relax and enjoy the scenery.
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San Diego Cultural Experience: History & Traditions
Go beyond sightseeing and connect with San Diego's living culture. From hands-on workshops to historic neighbourhood walks, this is the side of the city most travellers miss.
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Hotels in San Diego for September
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FAQ: San Diego in September
What is the weather like in San Diego in September?
San Diego in September has average highs of 25°C and lows of 18°C, with around 2.4 rainy days. The weather is generally warm.
Is September a good time to visit San Diego?
September is a shoulder season in San Diego, which means decent weather with fewer crowds and often lower prices than peak months.
How crowded is San Diego in September?
September sees moderate tourist numbers in San Diego. Popular spots will be busy but manageable.
How much does it cost to visit San Diego in September?
Budget travellers can get by on around USD 100/day. Mid-range travellers should budget USD 250/day. Shoulder season often offers good value compared to peak months.
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