Weather on October 21
Round Rock, TX
55 Years of Data
Avg High
81°F
Avg Low
55°F
Warmest
2004
80°F avg
Coldest
1976
49°F avg
About This Date
October 21st in Round Rock, TX typically brings warm fall weather, with average highs around 81°F and lows near 55°F — a 26°F daily swing. Over 54 years of records, the warmest October 21st was in 2004 (80°F average), while the coldest was 1976 (49°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 20% of October 21st dates historically, with the wettest October 21st recording 8.89" of rain. The last decade has been 2.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.2°F warmer on this date compared to 20-30 years ago.
Planning for October 21st 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 | 92° | 65° | 78° | — | — |
| 2024 | 83° | 54° | 68° | — | — |
| 2023 | 95° | 55° | 75° | — | — |
| 2022 | 84° | 47° | 65° | — | — |
| 2021 | 82° | 62° | 72° | — | — |
| 2020 | 88° | 71° | 79° | — | — |
| 2019 | 90° | 59° | 74° | 1.02" | — |
| 2018 | 64° | 53° | 59° | — | — |
| 2017 | 80° | 63° | 71° | 0.08" | — |
| 2016 | 79° | 53° | 66° | — | — |
| 2015 | 84° | 54° | 69° | — | — |
| 2014 | 79° | 56° | 67° | — | — |
| 2013 | 72° | 40° | 56° | — | — |
| 2012 | 84° | 55° | 70° | — | — |
| 2011 | 79° | 42° | 60° | — | — |
| 2010 | 87° | 62° | 75° | — | — |
| 2009 | 81° | 54° | 67° | 0.13" | — |
| 2008 | 83° | 54° | 68° | — | — |
| 2007 | 90° | 53° | 71° | — | — |
| 2005 | 88° | 55° | 71° | — | — |
| 2004warmest | 87° | 73° | 80° | — | — |
| 2003 | 85° | 57° | 71° | — | — |
| 2002 | 68° | 56° | 62° | 0.41" | — |
| 2001 | 79° | 61° | 70° | — | — |
| 2000 | 73° | 63° | 68° | 0.1" | — |
| 1999 | 73° | 44° | 59° | — | — |
| 1998 | 64° | 54° | 59° | 0.51" | — |
| 1997 | 82° | 58° | 70° | — | — |
| 1996 | 84° | 67° | 75° | — | — |
| 1995 | 89° | 45° | 67° | — | — |
| 1994 | 87° | 72° | 79° | — | — |
| 1993 | 65° | 54° | 59° | 0.18" | — |
| 1992 | 83° | 61° | 72° | — | — |
| 1991 | 79° | 50° | 64° | — | — |
| 1990 | 84° | 49° | 66° | 2.03" | — |
| 1989 | 79° | 42° | 60° | — | — |
| 1988 | 88° | 63° | 75° | — | — |
| 1987 | 71° | 47° | 59° | — | — |
| 1986 | 75° | 54° | 64° | — | — |
| 1985 | 73° | 64° | 69° | — | — |
| 1984 | 83° | 61° | 72° | 8.89" | — |
| 1983 | 79° | 48° | 63° | 0.36" | — |
| 1982 | 70° | 51° | 60° | — | — |
| 1981 | 80° | 55° | 68° | — | — |
| 1980 | 81° | 46° | 63° | — | — |
| 1979 | 94° | 64° | 79° | — | — |
| 1978 | 87° | 47° | 67° | — | — |
| 1977 | 91° | 60° | 76° | — | — |
| 1976coldest | 65° | 34° | 49° | — | — |
| 1975 | 84° | 57° | 71° | — | — |
| 1974 | 78° | 59° | 69° | — | — |
| 1973 | 81° | 47° | 64° | — | — |
| 1972 | 81° | 61° | 71° | 0.3" | — |
| 1971 | 77° | 52° | 64° | — | — |
54 years of data from GEORGETOWN