Weather in San Diego in September
In an average September, San Diego sees a daily high around 81°F and a low around 63°F, based on 1980–2026 of local climate records.
| Average high | 81°F |
|---|---|
| Typical high range | 73°F to 90°F |
| Average low | 63°F |
| Typical low range | 58°F to 69°F |
| Average daily precipitation | 0.00 in |
September records
The most extreme September on record for each metric, across 1980–2026. For rainfall, the wettest and driest are by total September accumulation.
High
Highest
104°F
2020-09-05
Lowest
63°F
1986-09-24
Low
Highest
82°F
2022-09-04
Lowest
49°F
2019-09-30
Feels-like
Highest
143°F
1988-09-03
Lowest
46°F
2019-09-30
Humidity
Highest
19.9 g/m³
1984-09-18
Lowest
4.3 g/m³
2004-09-23
Wind
Highest
16 mph
1988-09-04
Lowest
5 mph
1984-09-05
Gust
Highest
34 mph
2022-09-09
Lowest
12 mph
2016-09-20
Precip
Wettest
1.74 in
1997
Driest
0.00 in
2008
See San Diego's live weather grade →
Visiting San Diego in September? See how its comfort stacks up against where you live.
Compare San Diego with your city →