Weather on April 21
Round Rock, TX
55 Years of Data
Avg High
80°F
Avg Low
57°F
Warmest
2011
79°F avg
Coldest
1982
57°F avg
About This Date
April 21st in Round Rock, TX typically brings warm spring weather, with average highs around 80°F and lows near 57°F. Over 53 years of records, the warmest April 21st was in 2011 (79°F average), while the coldest was 1982 (57°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 34% of April 21st dates historically, with the wettest April 21st recording 10.19" of rain. The last decade has been 3.9°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.9°F cooler on this date compared to 20-30 years ago.
Planning for April 21st in Round Rock, TX? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
Cooling Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 83° | 54° | 68° | 0.43" | — |
| 2024 | 66° | 48° | 57° | 1.27" | — |
| 2023 | 86° | 61° | 73° | 10.19" | — |
| 2022 | 81° | 68° | 74° | — | — |
| 2021 | 82° | 42° | 62° | — | — |
| 2020 | 86° | 62° | 74° | — | — |
| 2019 | 83° | 46° | 64° | — | — |
| 2018 | 71° | 56° | 63° | 0.08" | — |
| 2017 | 84° | 67° | 75° | — | — |
| 2016 | 79° | 58° | 68° | 0.51" | — |
| 2015 | 71° | 48° | 60° | — | — |
| 2014 | 74° | 60° | 67° | — | — |
| 2013 | 73° | 47° | 60° | — | — |
| 2012 | 75° | 51° | 63° | 0.03" | — |
| 2011warmest | 88° | 70° | 79° | — | — |
| 2010 | 77° | 53° | 65° | — | — |
| 2009 | 82° | 54° | 68° | — | — |
| 2008 | 78° | 57° | 68° | — | — |
| 2007 | 77° | 53° | 65° | — | — |
| 2005 | 81° | 65° | 73° | 0.05" | — |
| 2004 | 78° | 66° | 72° | 0.05" | — |
| 2003 | 78° | 55° | 67° | — | — |
| 2002 | 87° | 70° | 78° | — | — |
| 2001 | 78° | 67° | 72° | — | — |
| 2000 | 84° | 52° | 68° | — | — |
| 1999 | 87° | 64° | 76° | — | — |
| 1998 | 79° | 51° | 65° | 0.84" | — |
| 1997 | 87° | 56° | 71° | 1.27" | — |
| 1996 | 89° | 60° | 75° | — | — |
| 1995 | 79° | 53° | 66° | — | — |
| 1994 | 77° | 61° | 69° | 0.1" | — |
| 1993 | 71° | 45° | 58° | — | — |
| 1992 | 74° | 40° | 57° | — | — |
| 1991 | 73° | 50° | 62° | — | — |
| 1990 | 83° | 67° | 75° | — | — |
| 1989 | 83° | 58° | 70° | — | — |
| 1988 | 88° | 56° | 72° | — | — |
| 1987 | 89° | 63° | 76° | — | — |
| 1986 | 78° | 56° | 67° | — | — |
| 1985 | 82° | 60° | 71° | 0.71" | — |
| 1984 | 93° | 63° | 78° | — | — |
| 1982coldest | 60° | 54° | 57° | 3.81" | — |
| 1981 | 85° | 63° | 74° | — | — |
| 1980 | 84° | 50° | 67° | — | — |
| 1979 | 68° | 57° | 63° | 0.05" | — |
| 1978 | 82° | 44° | 63° | — | — |
| 1977 | 74° | 59° | 66° | 0.43" | — |
| 1976 | 79° | 47° | 63° | — | — |
| 1975 | 74° | 58° | 66° | — | — |
| 1974 | 84° | 69° | 77° | 0.08" | — |
| 1973 | 82° | 70° | 76° | — | — |
| 1972 | 87° | 65° | 76° | 0.71" | — |
| 1971 | 87° | 44° | 66° | 0.08" | — |
53 years of data from GEORGETOWN