Santa Cruz weather in September
September in Santa Cruz: hot, a little rain — an excellent time to visit.
#5 of 12 months in Santa Cruz · #507 of 897 destinations to visit in September · comfort 81/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Santa Cruz in September
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Santa Cruz climate normals — September
| Daytime high | 31°C / 87°F | 🥵 hot |
|---|---|---|
| Nighttime low | 21°C / 70°F | |
| Rainfall | 40 mm / 1.6 in | 🌦 some rain |
| Rainy days | 6 days | |
| Humidity | 56% | 🍃 comfortable |
| Dew point | 14°C / 58°F | |
| Sunshine | 9.5 h/day | |
| Daylight | 12 h | |
| Wind | 23 km/h / 14 mph | |
| Air quality (US AQI) | 94 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Santa Cruz in September — FAQ
- Is September a good time to visit Santa Cruz?
- September in Santa Cruz: hot, a little rain — an excellent time to visit. It ranks #5 of 12 months for Santa Cruz on SeasonMap's comfort score (81/100).
- What is the weather like in Santa Cruz in September?
- In September, Santa Cruz averages a daily high of 30.6°C and a low of 21.2°C, with about 40.3 mm of rain over roughly 5.6 rainy days.
- What is the air quality in Santa Cruz in September?
- Santa Cruz has a mean US Air Quality Index of about 94 in September.