Weather on August 18
Round Rock, TX
55 Years of Data
Avg High
97°F
Avg Low
72°F
Warmest
2023
92°F avg
Coldest
2016
75°F avg
About This Date
August 18th in Round Rock, TX typically brings hot summer weather, with average highs around 97°F and lows near 72°F — a 25°F daily swing. Over 30 years of records, the warmest August 18th was in 2023 (92°F average), while the coldest was 2016 (75°F) — a 17°F range across recorded history. Rain or other precipitation has occurred on about 17% of August 18th dates historically, with the wettest August 18th recording 1.65" of rain.
Planning for August 18th in Round Rock, TX? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 100° | 74° | 87° | — | — |
| 2024 | 101° | 76° | 88° | — | — |
| 2023warmest | 109° | 75° | 92° | — | — |
| 2022 | 101° | 76° | 88° | — | — |
| 2021 | 92° | 73° | 82° | — | — |
| 2020 | 97° | 71° | 84° | — | — |
| 2019 | 102° | 78° | 90° | — | — |
| 2018 | 102° | 74° | 88° | — | — |
| 2017 | 98° | 74° | 86° | — | — |
| 2016coldest | 79° | 72° | 75° | 0.79" | — |
| 2015 | 95° | 72° | 83° | — | — |
| 2014 | 99° | 76° | 87° | — | — |
| 2013 | 92° | 65° | 78° | — | — |
| 2012 | 101° | 76° | 88° | — | — |
| 2011 | 102° | 72° | 87° | — | — |
| 2010 | 100° | 73° | 87° | — | — |
| 2009 | 99° | 75° | 87° | — | — |
| 2008 | 91° | 72° | 81° | 0.05" | — |
| 1982 | 101° | 76° | 88° | — | — |
| 1981 | 89° | 69° | 79° | 1.65" | — |
| 1980 | 99° | 69° | 84° | — | — |
| 1979 | 96° | 67° | 81° | — | — |
| 1978 | 101° | 73° | 87° | — | — |
| 1977 | 100° | 72° | 86° | — | — |
| 1976 | 95° | 70° | 82° | 0.1" | — |
| 1975 | 96° | 73° | 85° | — | — |
| 1974 | 96° | 72° | 84° | — | — |
| 1973 | 92° | 69° | 80° | — | — |
| 1972 | 92° | 67° | 79° | 0.08" | — |
| 1971 | 92° | 67° | 79° | — | — |
30 years of data from GEORGETOWN