Santa Cruz weather in September 2025

Expect 75°F daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Santa Cruz in September. Check more long-term weather averages for Santa Cruz in September before you book your next holiday to California in 2025/2026.

  • 75°F maximum daytime temperature in September in Santa Cruz75
    75°F max day temperature
  • 9 hours of sunshine per day
  • 2 days with some rainfall in September in Santa Cruz2
    2 days with some rainfall
  • 50°F minimum night-time temperature in September in Santa Cruz50
    50°F min night temperature
  • 12 hours of daylight per day in September in Santa Cruz12
    12 hours of daylight per day
  • No heat & humidity in September in Santa Cruz0
    No heat & humidity
  • 0.4 inches monthly rainfall in September in Santa Cruz0.4
    0.4 inches of monthly rainfall
  • UV (maximum) index 7 (High) in September in Santa Cruz7
    7 (High) UV index
  • 57°F sea temperature in September in Santa Cruz57
    57°F sea temperature

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The September weather guide for California (Santa Cruz) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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More about California

How hot is it in Santa Cruz in September?

Daytime temperatures usually reach 75°F in Santa Cruz in September, falling to 50°F at night.

How sunny is it in Santa Cruz in September?

There are normally 9 hours of bright sunshine each day in Santa Cruz in September - that's 75% of daylight hours.

How warm is the sea around Santa Cruz in September?

The average sea temperature around Santa Cruz in September is 57°F.

Does it ever rain in Santa Cruz in September?

There are usually 2 days with some rain in Santa Cruz in September and the average monthly rainfall is 0.4 inches.

Santa Cruz September sunrise & sunset times

Browse the sunrise and sunset times for Santa Cruz in September 2025. Select a month to view Santa Cruz sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:39 18:36
Monday, 15th September 2025 05:51 18:15
Tuesday, 30th September 2025 06:03 17:52

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