Weather on September 12
Round Rock, TX
55 Years of Data
Avg High
91°F
Avg Low
68°F
Warmest
2000
89°F avg
Coldest
2017
70°F avg
About This Date
September 12th in Round Rock, TX typically brings hot fall weather, with average highs around 91°F and lows near 68°F. Over 54 years of records, the warmest September 12th was in 2000 (89°F average), while the coldest was 2017 (70°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 22% of September 12th dates historically, with the wettest September 12th recording 8.36" of rain. The last decade has been 2.2°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.2°F cooler on this date compared to 20-30 years ago.
Planning for September 12th in Round Rock, TX? Stay hydrated and seek shade during peak afternoon hours.
Cooling Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 96° | 66° | 81° | — | — |
| 2024 | 90° | 69° | 79° | — | — |
| 2023 | 96° | 76° | 86° | — | — |
| 2022 | 89° | 68° | 79° | — | — |
| 2021 | 90° | 61° | 75° | — | — |
| 2020 | 83° | 60° | 71° | — | — |
| 2019 | 97° | 70° | 83° | 0.3" | — |
| 2018 | 79° | 70° | 74° | 1.12" | — |
| 2017coldest | 83° | 58° | 70° | — | — |
| 2016 | 89° | 67° | 78° | — | — |
| 2015 | 89° | 68° | 79° | 0.03" | — |
| 2014 | 98° | 73° | 86° | — | — |
| 2013 | 95° | 68° | 82° | — | — |
| 2012 | 92° | 60° | 76° | — | — |
| 2011 | 101° | 65° | 83° | — | — |
| 2010 | 95° | 73° | 84° | — | — |
| 2009 | 75° | 69° | 72° | 8.36" | — |
| 2008 | 96° | 74° | 85° | — | — |
| 2007 | 93° | 64° | 79° | — | — |
| 2006 | 95° | 70° | 82° | 6.27" | — |
| 2005 | 90° | 70° | 80° | 0.15" | — |
| 2004 | 93° | 70° | 81° | — | — |
| 2003 | 95° | 66° | 81° | 2.01" | — |
| 2002 | 91° | 70° | 80° | — | — |
| 2001 | 87° | 63° | 75° | — | — |
| 2000warmest | 102° | 76° | 89° | — | — |
| 1999 | 98° | 72° | 85° | — | — |
| 1998 | 72° | 70° | 71° | 2.72" | — |
| 1997 | 91° | 69° | 80° | — | — |
| 1996 | 88° | 64° | 76° | — | — |
| 1994 | 87° | 66° | 77° | — | — |
| 1993 | 98° | 69° | 84° | — | — |
| 1992 | 85° | 69° | 77° | — | — |
| 1991 | 89° | 69° | 79° | — | — |
| 1990 | 84° | 69° | 77° | — | — |
| 1989 | 89° | 70° | 79° | — | — |
| 1988 | 98° | 70° | 84° | — | — |
| 1987 | 94° | 69° | 81° | — | — |
| 1986 | 91° | 70° | 80° | 0.89" | — |
| 1985 | 83° | 70° | 76° | 1.4" | — |
| 1984 | 97° | 71° | 84° | — | — |
| 1983 | 96° | 68° | 82° | — | — |
| 1982 | 98° | 66° | 82° | — | — |
| 1981 | 96° | 65° | 80° | — | — |
| 1980 | 95° | 68° | 82° | — | — |
| 1979 | 92° | 59° | 75° | — | — |
| 1978 | 93° | 69° | 81° | 0.69" | — |
| 1977 | 97° | 71° | 84° | — | — |
| 1976 | 91° | 68° | 80° | — | — |
| 1975 | 91° | 71° | 81° | — | — |
| 1974 | 83° | 64° | 73° | — | — |
| 1973 | 96° | 72° | 84° | — | — |
| 1972 | 96° | 74° | 85° | — | — |
| 1971 | 92° | 70° | 81° | 0.05" | — |
54 years of data from GEORGETOWN