Pinnacles National Park weather in December
December in Pinnacles National Park: cool, rainy, with clean air — a great time to visit.
#12 of 12 months in Pinnacles National Park · #205 of 604 destinations to visit in December · comfort 77/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Pinnacles National Park climate normals — December
| Daytime high | 14°C / 57°F | 🙂 cool |
|---|---|---|
| Nighttime low | 4°C / 40°F | |
| Feels like (high) | 12°C / 54°F | |
| Rainfall | 98 mm / 3.8 in | 🌧 rainy |
| Rainy days | 10 days | |
| Humidity | 77% | 💦 very humid |
| Dew point | 4°C / 39°F | |
| Sunshine | 7 h/day | |
| Daylight | 9.7 h | |
| Wind | 10 km/h / 6 mph | |
| Air quality (US AQI) | 31 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Pinnacles National Park?
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Pinnacles National Park in December — FAQ
- Is December a good time to visit Pinnacles National Park?
- December in Pinnacles National Park: cool, rainy, with clean air — a great time to visit. It ranks #12 of 12 months for Pinnacles National Park on SeasonMap's comfort score (77/100).
- What is the weather like in Pinnacles National Park in December?
- In December, Pinnacles National Park averages a daily high of 14.1°C and a low of 4.3°C, with about 97.5 mm of rain over roughly 10.2 rainy days.
- What is the air quality in Pinnacles National Park in December?
- Pinnacles National Park has a mean US Air Quality Index of about 31 in December.