Cali weather in December
December in Cali: warm, soaked, with clean air — fine if you can take 25 rainy days.
#11 of 12 months in Cali · #499 of 897 destinations to visit in December · comfort 69/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Cali in December
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Cali climate normals — December
| Daytime high | 24°C / 76°F | 🌤 warm |
|---|---|---|
| Nighttime low | 18°C / 65°F | |
| Rainfall | 330 mm / 13 in | ⛈ soaked |
| Rainy days | 25 days | |
| Humidity | 84% | 💦 very humid |
| Dew point | 18°C / 65°F | |
| Sunshine | 8.1 h/day | |
| Daylight | 11.9 h | |
| Wind | 7 km/h / 4 mph | |
| Air quality (US AQI) | 27 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Cali in December — FAQ
- Is December a good time to visit Cali?
- December in Cali: warm, soaked, with clean air — fine if you can take 25 rainy days. It ranks #11 of 12 months for Cali on SeasonMap's comfort score (69/100).
- What is the weather like in Cali in December?
- In December, Cali averages a daily high of 24.4°C and a low of 18.2°C, with about 330.4 mm of rain over roughly 25.2 rainy days.
- What is the air quality in Cali in December?
- Cali has a mean US Air Quality Index of about 27 in December.