Weather on September 23
Round Rock, TX
55 Years of Data
Avg High
88°F
Avg Low
64°F
Warmest
2019
86°F avg
Coldest
2009
63°F avg
About This Date
September 23rd in Round Rock, TX typically brings warm fall weather, with average highs around 88°F and lows near 64°F. Over 30 years of records, the warmest September 23rd was in 2019 (86°F average), while the coldest was 2009 (63°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 17% of September 23rd dates historically.
Planning for September 23rd in Round Rock, TX? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 97° | 75° | 86° | — | — |
| 2024 | 96° | 75° | 86° | — | — |
| 2023 | 98° | 74° | 86° | — | — |
| 2022 | 97° | 68° | 82° | — | — |
| 2021 | 83° | 52° | 67° | — | — |
| 2020 | 71° | 66° | 69° | — | — |
| 2019warmest | 97° | 76° | 86° | — | — |
| 2018 | 76° | 64° | 70° | 0.03" | — |
| 2017 | 89° | 70° | 79° | — | — |
| 2016 | 93° | 67° | 80° | — | — |
| 2015 | 93° | 66° | 80° | — | — |
| 2014 | 89° | 63° | 76° | — | — |
| 2013 | 83° | 55° | 69° | — | — |
| 2012 | 89° | 62° | 76° | — | — |
| 2011 | 94° | 64° | 79° | — | — |
| 2010 | 87° | 72° | 79° | 0.23" | — |
| 2009coldest | 66° | 60° | 63° | 0.41" | — |
| 2008 | 91° | 62° | 77° | — | — |
| 1982 | 86° | 50° | 68° | — | — |
| 1981 | 93° | 61° | 77° | — | — |
| 1980 | 95° | 67° | 81° | — | — |
| 1979 | 92° | 54° | 73° | — | — |
| 1978 | 80° | 65° | 72° | — | — |
| 1977 | 96° | 72° | 84° | — | — |
| 1976 | 90° | 54° | 72° | — | — |
| 1975 | 79° | 50° | 64° | — | — |
| 1974 | 74° | 57° | 65° | — | — |
| 1973 | 90° | 68° | 79° | — | — |
| 1972 | 82° | 63° | 72° | 0.1" | — |
| 1971 | 83° | 69° | 76° | 0.15" | — |
30 years of data from GEORGETOWN