Cali Weather in September
In September, Cali averages a high of 30°C (87°F) and a low of 19°C (66°F), from 30 years of daily records (1975–2025).
30°C
Average high
87°F
19°C
Average low
66°F
36°C
Record high
97°F · September 29, 2015
14°C
Record low
58°F · September 30, 1976
What September Is Like in Cali
- The coldest September reading, 14°C (58°F) on September 30, 1976, has not been matched in 49 years.
- A typical September brings 20 days above 30°C (86°F).
- The warmest September in the record was 2019; the coldest was 1975.
At least 1 mm of rain falls on 30% of September days, and the month averages 73 mm in total.
Warmest: 2012 (32.8°C)Latest: 2020 (32.2°C)10-year averageLong-run average (30.5°C)
Look Up a Day in September
See the weather in Cali on any September date, year by year.
Source: NOAA GHCN-Daily, Cali/Alfonso Bonill (1971–2025). Averages cover 1975–2025. How we compute this