Weather on September 21
Killeen, TX
55 Years of Data
Avg High
89°F
Avg Low
66°F
Warmest
1980
85°F avg
Coldest
1991
59°F avg
About This Date
September 21st in Killeen, TX typically brings warm fall weather, with average highs around 89°F and lows near 66°F. Over 54 years of records, the warmest September 21st was in 1980 (85°F average), while the coldest was 1991 (59°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 15% of September 21st dates historically, with the wettest September 21st recording 2.54" of rain. The last decade has been 1.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.6°F warmer on this date compared to 20-30 years ago.
Planning for September 21st in Killeen, TX? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 95° | 72° | 83° | — | — |
| 2024 | 96° | 74° | 85° | — | — |
| 2023 | 96° | 74° | 85° | — | — |
| 2022 | 96° | 73° | 85° | — | — |
| 2021 | 91° | 72° | 81° | — | — |
| 2020 | 73° | 66° | 70° | — | — |
| 2019 | 95° | 76° | 85° | — | — |
| 2018 | 85° | 70° | 77° | 2.54" | — |
| 2017 | 95° | 75° | 85° | — | — |
| 2016 | 94° | 73° | 83° | — | — |
| 2015 | 95° | 69° | 82° | — | — |
| 2014 | 94° | 72° | 83° | — | — |
| 2013 | 86° | 65° | 75° | — | — |
| 2012 | 92° | 64° | 78° | — | — |
| 2011 | 96° | 66° | 81° | — | — |
| 2010 | 89° | 72° | 80° | 0.25" | — |
| 2009 | 93° | 73° | 83° | — | — |
| 2008 | 88° | 62° | 75° | — | — |
| 2007 | 92° | 68° | 80° | — | — |
| 2006 | 94° | 66° | 80° | — | — |
| 2005 | 98° | 69° | 84° | — | — |
| 2004 | 92° | 64° | 78° | — | — |
| 2002 | 86° | 57° | 72° | — | — |
| 2001 | 95° | 67° | 81° | 0.61" | — |
| 2000 | 100° | 70° | 85° | — | — |
| 1999 | 101° | 62° | 81° | — | — |
| 1998 | 92° | 72° | 82° | — | — |
| 1997 | 96° | 70° | 83° | — | — |
| 1996 | 88° | 66° | 77° | 1.24" | — |
| 1995 | 74° | 68° | 71° | — | — |
| 1994 | 86° | 41° | 64° | — | — |
| 1993 | 93° | 71° | 82° | — | — |
| 1992 | 93° | 72° | 82° | — | — |
| 1991coldest | 65° | 54° | 59° | — | — |
| 1990 | 88° | 72° | 80° | 0.03" | — |
| 1989 | 89° | 58° | 73° | — | — |
| 1988 | 93° | 67° | 80° | — | — |
| 1987 | 85° | 61° | 73° | — | — |
| 1986 | 88° | 70° | 79° | — | — |
| 1985 | 89° | 63° | 76° | — | — |
| 1984 | 75° | 64° | 70° | 0.51" | — |
| 1983 | 73° | 49° | 61° | — | — |
| 1982 | 87° | 52° | 69° | — | — |
| 1981 | 94° | 60° | 77° | — | — |
| 1980warmest | 94° | 76° | 85° | — | — |
| 1979 | 84° | 60° | 72° | 0.03" | — |
| 1978 | 92° | 67° | 79° | — | — |
| 1977 | 93° | 68° | 81° | — | — |
| 1976 | 84° | 61° | 72° | — | — |
| 1975 | 78° | 60° | 69° | 0.28" | — |
| 1974 | 87° | 69° | 78° | — | — |
| 1973 | 91° | 73° | 82° | — | — |
| 1972 | 94° | 71° | 82° | — | — |
| 1971 | 77° | 51° | 64° | — | — |
54 years of data from FT HOOD