When to go
San Diego in September
In September, San Diego averages daytime highs of 28°C and night-time lows of 17°C, with about 6 mm of rain over the month. That makes September the 3rd warmest and the 10th wettest month of the year here. It is one of the most comfortable months to visit.
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- Average high
- 28°C
- Average low
- 17°C
- Rainfall
- 6 mm
- Humidity
- 57%
Climate
San Diego weather through the year
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °C | 17 | 17 | 19 | 20 | 22 | 25 | 29 | 29 | 28 | 24 | 21 | 17 |
| Low °C | 8 | 8 | 9 | 10 | 11 | 13 | 16 | 17 | 17 | 14 | 11 | 8 |
| Rain mm | 41 | 55 | 29 | 17 | 7 | 14 | 4 | 4 | 6 | 15 | 25 | 51 |
Where to stay
Popular hotels in San Diego
Hampton Inn San Diego Mission Valley
★★★Hotels5.0 km from centre
8.3
Very good
Courtyard by Marriott San Diego Miramar
★★★Hotels20 km from centre
8.7
Excellent
Wyndham San Diego Bayside
★★★Hotelsunder 1 km from centre
8.0
Very good
Holiday Inn Express - Downtown San Diego by IHG
★★★Hotelsunder 1 km from centre
8.0
Very good
Wyndham Garden San Diego near SeaWorld
★★★Hotels6.4 km from centre
7.2
Good
Mission View Inn & Suites San Diego Sea World - Zoo
★★★Hotels5.3 km from centre
6.8
Fair
FAQ
San Diego in September: questions
Is September a good time to visit San Diego?
Yes — September is one of the most comfortable months in San Diego. Expect highs around 28°C and 6 mm of rain (NASA climate averages, 2001–2020).
How hot is San Diego in September?
The average daytime high in San Diego in September is 28°C and the average low is 17°C.
Does it rain in San Diego in September?
San Diego gets about 6 mm of rain in September on average, making it the 10th wettest month. Average humidity is 57%.
How much are hotels in San Diego in September?
Prices depend on dates and availability. Search San Diego for September on book.maqami.co to see live prices; signed-in members save up to 10% versus the guest price.
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