Weather on December 31
Round Rock, TX
55 Years of Data
Avg High
62°F
Avg Low
37°F
Warmest
2024
66°F avg
Coldest
1976
34°F avg
About This Date
December 31st in Round Rock, TX typically brings mild winter weather, with average highs around 62°F and lows near 37°F — a 25°F daily swing. Over 30 years of records, the warmest December 31st was in 2024 (66°F average), while the coldest was 1976 (34°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 33% of December 31st dates historically, with the wettest December 31st recording 4.6" of rain.
Planning for December 31st in Round Rock, TX? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 57° | 33° | 45° | — | — |
| 2024warmest | 86° | 46° | 66° | — | — |
| 2023 | 67° | 37° | 52° | — | — |
| 2022 | 63° | 42° | 52° | 0.05" | — |
| 2021 | 76° | 54° | 65° | — | — |
| 2020 | 73° | 37° | 55° | 4.22" | — |
| 2019 | 60° | 32° | 46° | — | — |
| 2018 | 42° | 37° | 40° | 0.76" | — |
| 2017 | 63° | 38° | 50° | — | — |
| 2016 | 54° | 45° | 49° | — | — |
| 2015 | 54° | 38° | 46° | — | — |
| 2014 | 44° | 34° | 39° | 0.03" | — |
| 2013 | 41° | 31° | 36° | — | — |
| 2012 | 47° | 29° | 38° | 0.25" | — |
| 2011 | 73° | 39° | 56° | — | — |
| 2010 | 74° | 57° | 65° | — | — |
| 2009 | 63° | 39° | 51° | — | — |
| 2008 | 73° | 37° | 55° | — | — |
| 1982 | 45° | 31° | 38° | 1.65" | — |
| 1981 | 78° | 38° | 58° | 0.2" | — |
| 1980 | 73° | 29° | 51° | — | — |
| 1979 | 56° | 32° | 44° | — | — |
| 1978 | 50° | 30° | 40° | 4.6" | — |
| 1977 | 66° | 49° | 57° | — | — |
| 1976coldest | 51° | 17° | 34° | — | — |
| 1975 | 69° | 34° | 51° | — | — |
| 1974 | 62° | 45° | 53° | 0.84" | — |
| 1973 | — | 33° | — | — | — |
| 1972 | 62° | 30° | 46° | — | — |
| 1971 | 63° | 50° | 56° | 0.33" | — |
30 years of data from GEORGETOWN