Weather on January 21
Allen, TX
55 Years of Data
Avg High
55°F
Avg Low
34°F
Warmest
1999
68°F avg
Coldest
1984
24°F avg
About This Date
January 21st in Allen, TX typically brings cool winter weather, with average highs around 55°F and lows near 34°F. Over 56 years of records, the warmest January 21st was in 1999 (68°F average), while the coldest was 1984 (24°F) — a 44°F range across recorded history. Rain or other precipitation has occurred on about 29% of January 21st dates historically, with the wettest January 21st recording 1.98" of rain. The last decade has been 5.4°F cooler on this date compared to 20-30 years ago.
The last decade has been 5.4°F cooler on this date compared to 20-30 years ago.
Planning for January 21st in Allen, TX? Bring layers as temperatures can vary throughout the day.
Cooling Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 67° | 45° | 56° | 0.03" | — |
| 2025 | 32° | 19° | 26° | — | — |
| 2024 | 37° | 28° | 33° | 0.13" | — |
| 2023 | 55° | 41° | 48° | 0.03" | — |
| 2022 | 45° | 21° | 33° | — | — |
| 2021 | 53° | 44° | 49° | — | — |
| 2020 | 47° | 30° | 39° | 0.05" | — |
| 2019 | 56° | 33° | 44° | — | — |
| 2018 | 73° | 55° | 64° | 1.14" | — |
| 2017 | 66° | 45° | 55° | 1.02" | — |
| 2016 | 48° | 36° | 42° | 1.98" | — |
| 2015 | 61° | 37° | 49° | 0.46" | — |
| 2014 | 51° | 27° | 39° | — | — |
| 2013 | 56° | 36° | 46° | — | — |
| 2012 | 52° | 36° | 44° | — | — |
| 2011 | 40° | 18° | 29° | — | — |
| 2010 | 64° | 40° | 52° | — | — |
| 2009 | 68° | 24° | 46° | — | — |
| 2008 | 40° | 36° | 38° | 0.23" | — |
| 2007 | 38° | 34° | 36° | 1.42" | — |
| 2006 | 58° | 29° | 44° | — | — |
| 2005 | 78° | 37° | 58° | — | — |
| 2004 | 54° | 28° | 41° | — | — |
| 2003 | 65° | 42° | 53° | — | — |
| 2002 | 57° | 30° | 44° | — | — |
| 2001 | 45° | 29° | 37° | 0.05" | — |
| 2000 | 56° | 25° | 40° | — | — |
| 1999warmest | 78° | 57° | 68° | — | — |
| 1998 | 61° | 47° | 54° | — | — |
| 1997 | 68° | 55° | 62° | — | — |
| 1996 | 58° | 27° | 42° | — | — |
| 1995 | 58° | 39° | 48° | — | — |
| 1994 | 41° | 33° | 37° | 0.18" | — |
| 1993 | 60° | 37° | 49° | — | — |
| 1992 | 59° | 36° | 47° | — | — |
| 1991 | 55° | 31° | 43° | — | — |
| 1990 | 58° | 35° | 46° | — | — |
| 1989 | 51° | 28° | 40° | — | — |
| 1988 | 46° | 23° | 35° | — | — |
| 1987 | 48° | 23° | 36° | — | — |
| 1986 | 80° | 52° | 66° | — | — |
| 1985 | 37° | 14° | 26° | — | — |
| 1984coldest | 39° | 9° | 24° | — | — |
| 1983 | 45° | 36° | 40° | — | — |
| 1982 | 66° | 53° | 60° | — | — |
| 1981 | 43° | 34° | 38° | 0.03" | — |
| 1980 | 48° | 45° | 46° | 1.47" | — |
| 1979 | 49° | 35° | 42° | 0.3" | — |
| 1978 | 30° | 22° | 26° | — | — |
| 1977 | 61° | 26° | 43° | — | — |
| 1976 | 63° | 25° | 44° | — | — |
| 1975 | 61° | 35° | 48° | — | — |
| 1974 | 66° | 32° | 49° | — | — |
| 1973 | 62° | 40° | 51° | 0.64" | — |
| 1972 | 73° | 42° | 58° | — | — |
| 1971 | 69° | 45° | 57° | — | — |
56 years of data from MCKINNEY MUNI AP