Weather on March 21
Round Rock, TX
55 Years of Data
Avg High
72°F
Avg Low
47°F
Warmest
2026
73°F avg
Coldest
2010
39°F avg
About This Date
March 21st in Round Rock, TX typically brings pleasant spring weather, with average highs around 72°F and lows near 47°F — a 25°F daily swing. Over 56 years of records, the warmest March 21st was in 2026 (73°F average), while the coldest was 2010 (39°F) — a 34°F range across recorded history. Rain or other precipitation has occurred on about 29% of March 21st dates historically, with the wettest March 21st recording 3.07" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for March 21st in Round Rock, TX? Great weather for outdoor activities.
Cooling Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 89° | 57° | 73° | — | — |
| 2025 | 70° | 42° | 56° | — | — |
| 2024 | 65° | 52° | 58° | 0.25" | — |
| 2023 | 55° | 43° | 49° | 0.41" | — |
| 2022 | 77° | 45° | 61° | 0.18" | — |
| 2021 | 71° | 39° | 55° | — | — |
| 2020 | 55° | 46° | 51° | 1.4" | — |
| 2019 | 75° | 45° | 60° | — | — |
| 2018 | 72° | 40° | 56° | — | — |
| 2017 | 83° | 61° | 72° | — | — |
| 2016 | 63° | 32° | 47° | — | — |
| 2015 | 68° | 53° | 61° | 3.07" | — |
| 2014 | 77° | 42° | 60° | — | — |
| 2013 | 73° | 50° | 62° | — | — |
| 2012 | 68° | 42° | 55° | — | — |
| 2011 | 78° | 64° | 71° | — | — |
| 2010coldest | 44° | 33° | 39° | 0.99" | — |
| 2009 | 81° | 50° | 65° | — | — |
| 2008 | 75° | 35° | 55° | — | — |
| 2007 | 77° | 64° | 71° | 0.05" | — |
| 2006 | 73° | 37° | 55° | — | — |
| 2005 | 77° | 62° | 70° | 0.05" | — |
| 2004 | 75° | 58° | 66° | 0.05" | — |
| 2003 | 61° | 51° | 56° | — | — |
| 2002 | 63° | 41° | 52° | 0.03" | — |
| 2001 | 67° | 40° | 53° | — | — |
| 2000 | 76° | 59° | 67° | 0.08" | — |
| 1999 | 68° | 42° | 55° | — | — |
| 1998 | 61° | 34° | 47° | — | — |
| 1997 | 78° | 46° | 62° | — | — |
| 1996 | 61° | 30° | 45° | — | — |
| 1995 | 82° | 55° | 69° | — | — |
| 1994 | 85° | 58° | 71° | — | — |
| 1993 | 59° | 52° | 55° | — | — |
| 1992 | 65° | 49° | 57° | — | — |
| 1991 | 70° | 58° | 64° | — | — |
| 1990 | 67° | 44° | 55° | — | — |
| 1989 | 86° | 36° | 61° | 0.56" | — |
| 1988 | 79° | 43° | 61° | — | — |
| 1987 | 81° | 44° | 62° | — | — |
| 1986 | 63° | 35° | 49° | — | — |
| 1985 | 73° | 49° | 61° | 0.13" | — |
| 1984 | 74° | 40° | 57° | — | — |
| 1983 | 51° | 30° | 41° | — | — |
| 1982 | 77° | 52° | 64° | — | — |
| 1981 | 78° | 56° | 67° | — | — |
| 1980 | 75° | 38° | 56° | — | — |
| 1979 | 75° | 58° | 66° | 2.84" | — |
| 1978 | 85° | 60° | 72° | — | — |
| 1977 | 72° | 55° | 63° | — | — |
| 1976 | 81° | 45° | 63° | — | — |
| 1975 | 82° | 62° | 72° | — | — |
| 1974 | 60° | 33° | 47° | 1.6" | — |
| 1973 | 71° | 42° | 57° | — | — |
| 1972 | 81° | 59° | 70° | 3.05" | — |
| 1971 | 83° | 49° | 66° | — | — |
56 years of data from GEORGETOWN