Cali weather in May
May in Cali: warm, soaked, with clean air — fine if you can take 20 rainy days.
#6 of 12 months in Cali · #623 of 897 destinations to visit in May · comfort 76/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Cali in May
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Cali climate normals — May
| Daytime high | 25°C / 77°F | 🌤 warm |
|---|---|---|
| Nighttime low | 19°C / 66°F | |
| Rainfall | 180 mm / 7.1 in | ⛈ soaked |
| Rainy days | 20 days | |
| Humidity | 82% | 💦 very humid |
| Dew point | 18°C / 65°F | |
| Sunshine | 7.3 h/day | |
| Daylight | 12.3 h | |
| Wind | 7 km/h / 5 mph | |
| Air quality (US AQI) | 34 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Cali in May — FAQ
- Is May a good time to visit Cali?
- May in Cali: warm, soaked, with clean air — fine if you can take 20 rainy days. It ranks #6 of 12 months for Cali on SeasonMap's comfort score (76/100).
- What is the weather like in Cali in May?
- In May, Cali averages a daily high of 25.2°C and a low of 18.7°C, with about 179.9 mm of rain over roughly 19.6 rainy days.
- What is the air quality in Cali in May?
- Cali has a mean US Air Quality Index of about 34 in May.