Austin weather in December
December in Austin: nice, a little rain, with clean air — an excellent time to visit.
#5 of 12 months in Austin · #143 of 604 destinations to visit in December · comfort 81/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Austin climate normals — December
| Daytime high | 19°C / 67°F | 😎 nice |
|---|---|---|
| Nighttime low | 9°C / 48°F | |
| Feels like (high) | 18°C / 64°F | |
| Rainfall | 48 mm / 1.9 in | 🌦 some rain |
| Rainy days | 5 days | |
| Humidity | 69% | 💧 humid |
| Dew point | 6°C / 43°F | |
| Sunshine | 7.1 h/day | |
| Daylight | 10.2 h | |
| Wind | 18 km/h / 11 mph | |
| Air quality (US AQI) | 31 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Austin in December — FAQ
- Is December a good time to visit Austin?
- December in Austin: nice, a little rain, with clean air — an excellent time to visit. It ranks #5 of 12 months for Austin on SeasonMap's comfort score (81/100).
- What is the weather like in Austin in December?
- In December, Austin averages a daily high of 19.3°C and a low of 9°C, with about 48.1 mm of rain over roughly 5.4 rainy days.
- What is the air quality in Austin in December?
- Austin has a mean US Air Quality Index of about 31 in December.