Weather on December 15
Round Rock, TX
55 Years of Data
Avg High
65°F
Avg Low
41°F
Warmest
2024
70°F avg
Coldest
1972
37°F avg
About This Date
December 15th in Round Rock, TX typically brings mild winter weather, with average highs around 65°F and lows near 41°F. Over 30 years of records, the warmest December 15th was in 2024 (70°F average), while the coldest was 1972 (37°F) — a 33°F range across recorded history. Rain or other precipitation has occurred on about 47% of December 15th dates historically, with the wettest December 15th recording 2.9" of rain.
Planning for December 15th in Round Rock, TX? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 45° | 29° | 37° | — | — |
| 2024warmest | 76° | 65° | 70° | 0.25" | — |
| 2023 | 67° | 48° | 57° | — | — |
| 2022 | 66° | 33° | 50° | — | — |
| 2021 | 72° | 59° | 65° | 0.05" | — |
| 2020 | 48° | 34° | 41° | — | — |
| 2019 | 72° | 42° | 57° | — | — |
| 2018 | 51° | 39° | 45° | — | — |
| 2017 | 61° | 43° | 52° | — | — |
| 2016 | 54° | 40° | 47° | — | — |
| 2015 | 73° | 38° | 55° | — | — |
| 2014 | 70° | 59° | 64° | 0.2" | — |
| 2013 | 48° | 29° | 38° | — | — |
| 2012 | 68° | 54° | 61° | — | — |
| 2011 | 71° | 54° | 62° | 0.38" | — |
| 2010 | 70° | 36° | 53° | — | — |
| 2009 | 67° | 40° | 53° | 0.25" | — |
| 2008 | 77° | 33° | 55° | 0.13" | — |
| 1982 | 70° | 41° | 55° | — | — |
| 1981 | 64° | 25° | 44° | — | — |
| 1980 | 69° | 50° | 60° | 0.05" | — |
| 1979 | 64° | 41° | 53° | 0.15" | — |
| 1978 | 70° | 40° | 55° | 0.08" | — |
| 1977 | 74° | 37° | 55° | — | — |
| 1976 | 54° | 45° | 49° | 0.1" | — |
| 1975 | 74° | 38° | 56° | 0.43" | — |
| 1974 | 65° | 30° | 47° | 0.05" | — |
| 1973 | — | 38° | — | — | — |
| 1972coldest | 45° | 30° | 37° | 2.9" | — |
| 1971 | 77° | 42° | 60° | 0.05" | — |
30 years of data from GEORGETOWN