Weather on March 21
Arlington, TX
55 Years of Data
Avg High
71°F
Avg Low
47°F
Warmest
2026
76°F avg
Coldest
1996
40°F avg
About This Date
March 21st in Arlington, TX typically brings pleasant spring weather, with average highs around 71°F and lows near 47°F. Over 36 years of records, the warmest March 21st was in 2026 (76°F average), while the coldest was 1996 (40°F) — a 36°F range across recorded history. Rain or other precipitation has occurred on about 22% of March 21st dates historically, with the wettest March 21st recording 2.9" of rain. The last decade has been 4.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.8°F warmer on this date compared to 20-30 years ago.
Planning for March 21st in Arlington, TX? Great weather for outdoor activities.
Warming Trend
1.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 91° | 61° | 76° | — | — |
| 2025 | 79° | 42° | 60° | — | — |
| 2024 | 64° | 55° | 60° | 1.04" | — |
| 2023 | 69° | 51° | 60° | 0.03" | — |
| 2022 | 74° | 53° | 63° | 2.9" | — |
| 2021 | 72° | 46° | 59° | — | — |
| 2020 | 61° | 44° | 52° | 0.76" | — |
| 2019 | 78° | 39° | 59° | — | — |
| 2018 | 71° | 35° | 53° | — | — |
| 2017 | 84° | 61° | 72° | — | — |
| 2016 | 67° | 32° | 49° | — | — |
| 2015 | 63° | 54° | 58° | 0.15" | — |
| 2014 | 81° | 52° | 66° | — | — |
| 2013 | 69° | 50° | 60° | — | — |
| 2012 | 64° | 49° | 56° | — | — |
| 2011 | 83° | 63° | 73° | — | — |
| 2010 | 48° | 32° | 40° | — | — |
| 2009 | 79° | 53° | 66° | — | — |
| 2008 | 77° | 48° | 63° | 0.08" | — |
| 2007 | 80° | 65° | 72° | — | — |
| 2006 | 59° | 39° | 49° | — | — |
| 2005 | 81° | 59° | 70° | 0.15" | — |
| 2004 | 70° | 50° | 60° | — | — |
| 2003 | 65° | 47° | 56° | — | — |
| 2002 | 65° | 37° | 51° | — | — |
| 2001 | 74° | 38° | 56° | — | — |
| 2000 | 64° | 54° | 59° | 1.96" | — |
| 1999 | 72° | 39° | 55° | — | — |
| 1998 | 62° | 34° | 48° | — | — |
| 1997 | 73° | 47° | 60° | — | — |
| 1996coldest | 54° | 27° | 40° | — | — |
| 1995 | 80° | 50° | 65° | — | — |
| 1994 | 86° | 53° | 70° | — | — |
| 1993 | 58° | 47° | 52° | — | — |
| 1992 | 66° | 42° | 54° | — | — |
| 1991 | 71° | 50° | 61° | — | — |
36 years of data from ARLINGTON MUNI AP