Santa Cruz Weather in September
In September, Santa Cruz averages a high of 30°C (87°F) and a low of 19°C (66°F), from 25 years of daily records (1982–2025).
30°C
Average high
87°F
19°C
Average low
66°F
40°C
Record high
103°F · September 30, 2007
6°C
Record low
43°F · September 9, 1976
What September Is Like in Santa Cruz
- September 2024 was the warmest September in 25 years of records, 3.3°C (6.0°F) above the long-run average.
- The coldest September reading, 6°C (43°F) on September 9, 1976, has not been matched in 49 years.
- A typical September brings 2.8 days above 35°C (95°F).
- The warmest September in the record was 2024; the coldest was 1993.
At least 1 mm of rain falls on 28% of September days.
Warmest: 2024 (34.1°C)Latest: 2024 (34.1°C)10-year averageLong-run average (30.1°C)
Look Up a Day in September
See the weather in Santa Cruz on any September date, year by year.
Source: NOAA GHCN-Daily, El Trompillo (1973–2025). Averages cover 1982–2025. How we compute this