Climate averages 1991–2020
Austin weather
in December.
A mild, moderately wet month: the 11th warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a mild month in Austin: daytime highs average 16.6°C and nights cool to about 6.9°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 70 mm of rain on roughly 7 days, which makes December a moderately wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 14 min on an average December day.
The nearest other city in this atlas is Round Rock (28 km away). In December its highs average 16.3°C, about as warm as Austin, with 70 mm of rain.
Among the 498 cities listed in the United States, Austin ranks joint 118th of 498 for the warmest December highs and joint 252nd of 498 for the driest December (rainfall, lowest first). The mean December high of those 498 cities is 10.5°C; Austin is 6.0°C warmer than that mean.
From December to January, average highs fall by 0.7°C to 15.9°C, and monthly rainfall falls from 70 mm to 61 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Austin climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 15.9°C5.9°C | 5.9°C | 61 | 7.1 | 10.410 h |
| February | 18.1°C7.7°C | 7.7°C | 62 | 7.5 | 11.111 h |
| March | 21.8°C11.2°C | 11.2°C | 74 | 9.0 | 12.012 h |
| April | 25.8°C15.0°C | 15.0°C | 83 | 8.6 | 12.913 h |
| May | 29.3°C19.5°C | 19.5°C | 116 | 10.8 | 13.714 h |
| June | 32.6°C23.0°C | 23.0°C | 77 | 9.2 | 14.114 h |
| July | 34.6°C24.4°C | 24.4°C | 42 | 5.7 | 13.914 h |
| August | 35.0°C24.8°C | 24.8°C | 59 | 5.6 | 13.213 h |
| September | 31.3°C21.8°C | 21.8°C | 75 | 8.0 | 12.412 h |
| October | 26.7°C16.6°C | 16.6°C | 85 | 7.2 | 11.511 h |
| November | 20.6°C10.9°C | 10.9°C | 74 | 6.7 | 10.711 h |
| December, selected | 16.6°C6.9°C | 6.9°C | 70 | 7.4 | 10.210 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Round Rock in DecemberUnited States · 28 kmHigh 16.3°C · Low 6.8°C · 70 mm rain
- New Braunfels in DecemberUnited States · 73 kmHigh 17.1°C · Low 7.6°C · 67 mm rain
- Killeen in DecemberUnited States · 95 kmHigh 15.6°C · Low 5.9°C · 72 mm rain
- Temple in DecemberUnited States · 100 kmHigh 15.6°C · Low 6.0°C · 82 mm rain
- San Antonio in DecemberUnited States · 118 kmHigh 17.5°C · Low 7.8°C · 63 mm rain
- Bryan in DecemberUnited States · 139 kmHigh 16.3°C · Low 6.9°C · 95 mm rain
- College Station in DecemberUnited States · 141 kmHigh 16.4°C · Low 7.0°C · 95 mm rain
- Waco in DecemberUnited States · 154 kmHigh 15.5°C · Low 6.0°C · 83 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Austin) is explained once on the Austin year overview and on the Sources, method and limits page.