Weather on October 21
Plano, TX
55 Years of Data
Avg High
78°F
Avg Low
54°F
Warmest
2012
80°F avg
Coldest
1976
51°F avg
About This Date
October 21st in Plano, TX typically brings pleasant fall weather, with average highs around 78°F and lows near 54°F. Over 55 years of records, the warmest October 21st was in 2012 (80°F average), while the coldest was 1976 (51°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 15% of October 21st dates historically, with the wettest October 21st recording 11.43" of rain. The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
Planning for October 21st in Plano, TX? Great weather for outdoor activities.
Warming Trend
1.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 81° | 63° | 72° | — | — |
| 2024 | 82° | 57° | 70° | — | — |
| 2023 | 89° | 61° | 75° | — | — |
| 2022 | 88° | 49° | 68° | — | — |
| 2021 | 82° | 64° | 73° | — | — |
| 2020 | 86° | 59° | 73° | — | — |
| 2019 | 72° | 50° | 61° | 2.21" | — |
| 2018 | 68° | 49° | 58° | — | — |
| 2017 | 85° | 70° | 77° | — | — |
| 2016 | 73° | 51° | 62° | — | — |
| 2015 | 83° | 66° | 74° | — | — |
| 2014 | 80° | 56° | 68° | — | — |
| 2013 | 73° | — | — | — | — |
| 2012warmest | 87° | 73° | 80° | — | — |
| 2011 | 81° | 50° | 65° | — | — |
| 2010 | 85° | 57° | 71° | — | — |
| 2009 | 68° | 61° | 64° | 3.28" | — |
| 2008 | 79° | 57° | 68° | — | — |
| 2007 | 83° | 64° | 73° | — | — |
| 2006 | 78° | 49° | 63° | — | — |
| 2005 | 74° | 52° | 63° | — | — |
| 2004 | 82° | 68° | 75° | 0.03" | — |
| 2003 | 90° | 52° | 71° | — | — |
| 2002 | 67° | 52° | 59° | 11.43" | — |
| 2001 | 77° | 58° | 67° | — | — |
| 2000 | 68° | 56° | 62° | — | — |
| 1999 | 80° | 40° | 60° | — | — |
| 1998 | 72° | 56° | 64° | — | — |
| 1997 | 78° | 53° | 66° | — | — |
| 1996 | 81° | 62° | 71° | — | — |
| 1995 | 80° | 39° | 60° | — | — |
| 1994 | 78° | 63° | 70° | 8.15" | — |
| 1993 | 65° | 49° | 57° | — | — |
| 1992 | 80° | 60° | 70° | — | — |
| 1991 | 78° | 48° | 63° | — | — |
| 1990 | 80° | 47° | 63° | — | — |
| 1989 | 80° | 43° | 61° | — | — |
| 1988 | 73° | 58° | 65° | — | — |
| 1987 | 65° | 40° | 52° | — | — |
| 1986 | 74° | 50° | 62° | — | — |
| 1985 | 74° | 60° | 67° | — | — |
| 1984 | 65° | 52° | 58° | 4.78" | — |
| 1983 | 73° | 57° | 65° | 0.66" | — |
| 1982 | 63° | 44° | 53° | — | — |
| 1981 | 76° | 57° | 66° | — | — |
| 1980 | 86° | 52° | 69° | — | — |
| 1979 | 88° | 52° | 70° | — | — |
| 1978 | 89° | 49° | 69° | — | — |
| 1977 | 87° | 57° | 72° | — | — |
| 1976coldest | 70° | 33° | 51° | — | — |
| 1975 | 84° | 57° | 71° | — | — |
| 1974 | 74° | 50° | 62° | — | — |
| 1973 | 80° | 46° | 63° | — | — |
| 1972 | 70° | 54° | 62° | 0.71" | — |
| 1971 | 77° | 54° | 65° | — | — |
55 years of data from RICHARDSON