Austin weather in December
December in Austin: nice, a little rain, with clean air — a great time to visit.
Updated September 2026 · climate normals from ERA5 reanalysis
#6 of 12 months in Austin · #567 of 1413 destinations to visit in December · comfort 76/100 (tier B)
- Days
- 20°C
- Nights
- 8°C
- Wet days
- 6
- Sun
- 6.4 h
- Humidity
- 70%
- Daylight
- 10 h

Traveller notes on Austin in December
Notes from nearby San Antonio (118 km away)
Austin doesn't have its own notes for December yet — these are about San Antonio, close enough to share the season.
Regulars are blunt that Texas weather doesn't make up its mind until close to the trip itself, with swings from the upper 70s one day to the upper 30s just two days later well within normal range for this month. Our row backs the mild average sitting between those extremes, 20.7C over 7.3C nights feeling 5C, with 47.6mm of rain across 4.6 days. Regulars are consistent the standard packing answer is simply everything - shorts and short sleeves for a warm afternoon, a real jacket for a cold snap - checking the forecast close to departure rather than trusting any single seasonal average. Snow is essentially a non-issue here, regulars call it a rare novelty rather than a planning concern. Visiting after Thanksgiving means catching the River Walk's holiday lights, a genuine seasonal highlight regulars are quick to recommend. The record: humidity 69 percent, 6.4 hours of sun, a 17.1 kph wind and AQI 31.
Other months in Austin
Regulars call this the most unpredictable month of the year here, capable of sub-freezing cold or 60-plus Fahrenheit warmth within the same week - one recent February never dropped below freezing at all and ran genuinely hot, while a different year brought a full week of snow and ice. Our row backs the moderate average sitting between those real extremes, 19.6C over 7.4C nights feeling 5C, with 52.2mm of rain across 4.9 days and a trace of possible snow, 0.9cm. Regulars are direct that the practical response is flexibility rather than optimism - avoid non-refundable bookings and be ready to adjust plans on short notice given how fast conditions can flip. The record: humidity 70 percent, 6.8 hours of sun, a 20.5 kph wind and AQI 36.
October is the month regulars rate highest for weather here - late October into November is the best of the year - and the month the city is hardest to book. The festival weekends, the grand prix and the university's home games between them fill the hotels, push rates up and bring minimum stays, so the advice is to book early or choose the weeks between. If you are not going to the festival it barely touches downtown, because the music is all out at the park. Our row gives 29.4C over 16.5C at 62 percent humidity with 91.4mm of rain across 5.7 days - sixteen millimetres at a time. The record: 9.1 hours of sun, a 17.2 kph wind and AQI 38.
April is the month regulars hand out here, and the reason is the hill country: the bluebonnets run from March and the real show is usually early to mid April, with nothing left by summer. The weather half is a slope - pleasant and not yet hot at the start, hot and humid by the end, with nights still in the low teens. Our row averages 27.3C over 15.1C, a twelve-degree gap, at 68 percent humidity with a 21.4 kph wind. Rain is 108mm across 6.5 days, which means storms rather than showers when they arrive. Wildflower roads west of the city are the day out this month is for. The record: a dew point of 13.5C, 8.8 hours of sun and AQI 40.
November is the month Austin regulars hand over as the city's best weather, with the summer humidity gone and highs in the 60s and 70s Fahrenheit through the first half. The month does not hold still, though: by late November it has turned, shorts are unlikely, and the standing description of the swing is 40 one day and 75 the next. What they suggest packing for the last week is jeans, a long-sleeved shirt and a light jacket. Two practical consequences follow: the rivers are too cool for tubing by now, a heated pool aside, and the Hill Country is the day trip people name instead. Our row's 22.9C average high against 10.8C nights is that gap in one line. The record: 5.1 precipitation days carrying 56.2mm, 7.2 hours of sun and AQI 34.
Add your own note from Austin's card on the map.
Austin climate normals — December
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Austin in December
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Peak crowdsTrail of Lights, Winter / Christmas break in United States, school holidays in 2 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Austin's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherAustin's best weather comes in March, April and November — separate windows, not one continuous season.
Best weatherFair weatherToughest weather
What's on in Austin in December
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Festival
Trail of Lights
8–23 Dec · usuallyChristmas & New YearCrowdedTwo weeks of light displays through Zilker Park in December, free on some nights and ticketed on the rest. The Zilker tree and the queue for it are the local ritual. Source ↗
- Hazard
Cedar fever
15 Dec – 20 Feb · usuallyPollen seasonAshe juniper releases through the coldest weeks and the counts run higher than almost anything else in North America. People who have never had hay fever in their lives get it here. Source ↗
Nearby, and something's on
Within 300 km of Austin — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Austin?
Austin in December — FAQ
- Is December a good time to visit Austin?
- December in Austin: nice, a little rain, with clean air — a great time to visit. It ranks #6 of 12 months for Austin on SeasonMap's comfort score (76/100).
- What is the weather like in Austin in December?
- In December, Austin averages a daily high of 19.5°C and a low of 7.5°C, with about 73.5 mm of rain over roughly 5.5 rainy days.
- What is the air quality in Austin in December?
- Austin has a mean US Air Quality Index of about 31 in December.
Within 300 km: San Antonio's River Walk holiday season around 26 Nov – 6 Jan, and Houston's The first cool fronts around 15 Oct – 10 Dec.