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Photo by Tuxyso, CC BY-SA 3.0, via Wikimedia Commons.
San Diego in September
sweet spot · one of the best months to go
The year in San Diego
Tap a month for its page
- JanJSan Diego in January: good
- FebFSan Diego in February: good
- MarMSan Diego in March: ok, busy
- AprASan Diego in April: sweet spot
- MayMSan Diego in May: sweet spot
- JunJSan Diego in June: sweet spot
- JulJSan Diego in July: good
- AugASan Diego in August: good, busy
- SepSSan Diego in September: sweet spot
- OctOSan Diego in October: good
- NovNSan Diego in November: good
- DecDSan Diego in December: good
- Sweet spot
- Good
- OK
- Avoid
- Busy
Plan this trip
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Book with the airline
Where to stay
Book direct
Luxury
Things to do
Car hire
Rent direct
Travel insurance
Check whether your bank card or home insurance already covers this trip.
If the trip needs a visa, the travel agent or visa centre usually sells the cover it asks for.
Mobile data (eSIM)
Your own plan's EU roaming may already cover this.
Renting a pocket Wi-Fi is the other common way to stay connected.
These are sites people in book with. Each opens in a new tab, on the site's own pages.
The numbers
| Daily high | 25°C |
|---|---|
| Nightly low | 18°C |
| Feels like, afternoon | 27°C |
| Rainy days, 1 mm or more | 1 · 14 mm |
| Humidity | 77% |
| Sunshine | 10.6 h/day |
| Daylight | 12.4 h/day |
| Days over 35°C | 0 |
| Crowds | 100 / 100, higher is quieter |
Ten-year averages for this calendar month. A rainy day is one with at least 1 mm of rain, as a weather station counts it. The model these figures come from drizzles more than a rain gauge, the more so the warmer the month, so its days count from 2 mm, rising to 5 mm in the hottest.
How busy it gets
Public holidays in September
Holidays crowd a place out and push fares up around them; they count toward the crowd score above.
What September is known for
- Shoulder season — Milder weather and fewer tourists offer a more relaxed experience.
Written by a language model from the climate figures; the numbers above are measured and win where the two disagree.
San Diego in pictures
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Rufustelestrat, CC BY-SA 3.0, via Wikimedia Commons
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Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
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Bernard Gagnon, CC BY-SA 3.0, via Wikimedia Commons
What to pack
- Sun protection: about 11 hours of sunshine a day.
- Humidity averages 77%; breathable fabrics dry faster.
Each line is a threshold over the ten-year figures above, not advice from anywhere else.
Before you go
Type A and B plugs at 120 V. Drives on the right. The currency is the United states dollar. No UK Foreign Office advice against travel. Global Affairs Canada: Exercise normal security precautions. Everything for United States: cost of living, languages, emergency numbers and health.
On arrival in San Diego: the apps, paying, getting around, tipping and the emergency numbers.
September elsewhere
In September from
The other months at San Diego
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