Weather in San Jose in September
In an average September, San Jose sees a daily high around 78°F and a low around 56°F, based on 1980–2026 of local climate records.
| Average high | 78°F |
|---|---|
| Typical high range | 69°F to 88°F |
| Average low | 56°F |
| Typical low range | 51°F to 62°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
105°F
2017-09-03
Lowest
63°F
1986-09-24
Low
Highest
77°F
2020-09-06
Lowest
44°F
2013-09-27
Feels-like
Highest
122°F
2017-09-03
Lowest
40°F
2019-09-29
Humidity
Highest
16.0 g/m³
1998-09-06
Lowest
5.5 g/m³
1984-09-25
Wind
Highest
15 mph
2007-09-19
Lowest
3 mph
2015-09-30
Gust
Highest
43 mph
2022-09-18
Lowest
12 mph
1999-09-29
Precip
Wettest
1.76 in
1982
Driest
0.00 in
2006
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