Weather on April 21
Allen, TX
55 Years of Data
Avg High
77°F
Avg Low
54°F
Warmest
2008
75°F avg
Coldest
2021
47°F avg
About This Date
April 21st in Allen, TX typically brings pleasant spring weather, with average highs around 77°F and lows near 54°F. Over 55 years of records, the warmest April 21st was in 2008 (75°F average), while the coldest was 2021 (47°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 31% of April 21st dates historically, with the wettest April 21st recording 2.21" 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 Allen, TX? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Cooling Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 79° | 48° | 63° | — | — |
| 2024 | 66° | 45° | 55° | — | — |
| 2023 | 75° | 51° | 63° | — | — |
| 2022 | 81° | 70° | 75° | — | — |
| 2021coldest | 62° | 32° | 47° | — | — |
| 2020 | 82° | 54° | 68° | — | — |
| 2019 | 80° | 56° | 68° | — | — |
| 2018 | 62° | 53° | 58° | 0.69" | — |
| 2017 | 82° | 59° | 71° | 0.15" | — |
| 2016 | 77° | 58° | 67° | 0.18" | — |
| 2015 | 69° | 45° | 57° | 0.46" | — |
| 2014 | 81° | 61° | 71° | — | — |
| 2013 | 69° | 46° | 58° | — | — |
| 2012 | 73° | 44° | 59° | — | — |
| 2011 | 83° | 56° | 69° | 0.08" | — |
| 2010 | 78° | 49° | 63° | 0.03" | — |
| 2009 | 85° | 45° | 65° | — | — |
| 2008warmest | 83° | 67° | 75° | — | — |
| 2007 | 78° | 56° | 67° | — | — |
| 2006 | 75° | 59° | 67° | 1.52" | — |
| 2005 | 79° | 64° | 71° | 0.03" | — |
| 2004 | 83° | 66° | 74° | — | — |
| 2003 | 79° | 43° | 61° | — | — |
| 2002 | 75° | 59° | 67° | — | — |
| 2001 | 75° | 67° | 71° | 0.05" | — |
| 2000 | 73° | 47° | 60° | — | — |
| 1999 | 83° | 60° | 71° | — | — |
| 1998 | 69° | 44° | 57° | — | — |
| 1997 | 84° | 56° | 70° | 0.05" | — |
| 1996 | 86° | 57° | 72° | — | — |
| 1995 | 81° | 53° | 67° | — | — |
| 1994 | 83° | 59° | 71° | — | — |
| 1993 | 69° | 46° | 58° | — | — |
| 1992 | 74° | 43° | 58° | — | — |
| 1991 | 78° | 50° | 64° | — | — |
| 1990 | 81° | 63° | 72° | 2.21" | — |
| 1989 | 83° | 58° | 70° | — | — |
| 1988 | 82° | 59° | 71° | — | — |
| 1987 | 89° | 58° | 73° | — | — |
| 1986 | 73° | 55° | 64° | — | — |
| 1985 | 84° | 65° | 74° | — | — |
| 1984 | 85° | 59° | 72° | 0.53" | — |
| 1983 | 69° | 50° | 60° | — | — |
| 1982 | 63° | 51° | 57° | — | — |
| 1981 | 84° | 62° | 73° | — | — |
| 1980 | 83° | 49° | 66° | — | — |
| 1979 | 74° | 60° | 67° | — | — |
| 1978 | 74° | 41° | 57° | — | — |
| 1977 | 71° | 59° | 65° | — | — |
| 1976 | 75° | 47° | 61° | 0.05" | — |
| 1975 | 78° | 47° | 62° | — | — |
| 1974 | 80° | 61° | 70° | 0.81" | — |
| 1973 | 76° | 69° | 72° | 0.03" | — |
| 1972 | 83° | 55° | 69° | 0.48" | — |
| 1971 | 81° | 48° | 64° | 0.53" | — |
55 years of data from MCKINNEY MUNI AP