Big Sur weather in December
December in Big Sur: cool, soaked, with clean air — a gamble, with 12 rainy days.
#12 of 12 months in Big Sur · #667 of 897 destinations to visit in December · comfort 57/100 (tier D)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Big Sur in December
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Big Sur climate normals — December
| Daytime high | 16°C / 60°F | 🙂 cool |
|---|---|---|
| Nighttime low | 11°C / 51°F | |
| Rainfall | 167 mm / 6.6 in | ⛈ soaked |
| Rainy days | 12 days | |
| Humidity | 81% | 💦 very humid |
| Dew point | 9°C / 49°F | |
| Sunshine | 6.9 h/day | |
| Daylight | 9.7 h | |
| Wind | 20 km/h / 12 mph | |
| Air quality (US AQI) | 34 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Big Sur?
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Big Sur in December — FAQ
- Is December a good time to visit Big Sur?
- December in Big Sur: cool, soaked, with clean air — a gamble, with 12 rainy days. It ranks #12 of 12 months for Big Sur on SeasonMap's comfort score (57/100).
- What is the weather like in Big Sur in December?
- In December, Big Sur averages a daily high of 15.6°C and a low of 10.5°C, with about 166.5 mm of rain over roughly 11.8 rainy days.
- What is the air quality in Big Sur in December?
- Big Sur has a mean US Air Quality Index of about 34 in December.