Weather on August 21 at Big Bend
Big Bend National Park
Based on 54 years of data from Alpine, TX
Elevation Note: Big Bend sits at 3,800 ft. Expect temperatures 13°F cooler than the data shown below, which comes from Alpine, TX at a lower elevation.
Planning Your Visit
August 21st in Big Bend National Park (via Alpine, TX) typically brings warm summer weather, with average highs around 89°F and lows near 63°F — a 26°F daily swing. Over 54 years of records, the warmest August 21st was in 2020 (84°F average), while the coldest was 1981 (67°F) — a 17°F range across recorded history. Rain or other precipitation has occurred on about 26% of August 21st dates historically, with the wettest August 21st recording 6.2" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for August 21st in Big Bend? Stay hydrated and seek shade during peak afternoon hours.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 85°F | 58°F | -- | -- |
| 2024 | 98°F | 69°F | -- | -- |
| 2023 | 93°F | 63°F | 0.03" | -- |
| 2022 | 82°F | 66°F | 0.76" | -- |
| 2021 | 86°F | 66°F | -- | -- |
| 2020 | 98°F | 69°F | -- | -- |
| 2019 | 94°F | 62°F | 0" | 0" |
| 2018 | 88°F | 63°F | 0" | 0" |
| 2017 | 86°F | 61°F | 1.5" | -- |
| 2016 | 80°F | 63°F | 0" | 0" |
| 2015 | 99°F | 62°F | 0.66" | -- |
| 2014 | 94°F | 70°F | 0.33" | -- |
| 2013 | 91°F | 54°F | 0" | 0" |
| 2012 | 88°F | 60°F | 0" | 0" |
| 2011 | 97°F | 67°F | 0" | -- |
| 2010 | 94°F | 67°F | 0" | 0" |
| 2009 | 95°F | 66°F | 0" | 0" |
| 2008 | 83°F | 61°F | 0.08" | 0" |
| 2007 | 95°F | 69°F | 0.28" | 0" |
| 2005 | 82°F | 60°F | 1.12" | 0" |
| 2004 | 86°F | 59°F | 0.97" | 0" |
| 2003 | 91°F | 65°F | 0" | 0" |
| 2002 | 93°F | 66°F | 0.3" | 0" |
| 2001 | 88°F | 71°F | 0.08" | 0" |
| 2000 | 94°F | 70°F | 0" | 0" |
| 1999 | 93°F | 67°F | 0" | 0" |
| 1998 | 83°F | 60°F | 0" | 0" |
| 1997 | 91°F | 61°F | 0" | 0" |
| 1996 | 87°F | 62°F | 0" | 0" |
| 1995 | 90°F | 63°F | 0" | 0" |
| 1994 | 85°F | 65°F | 0" | 0" |
| 1993 | 90°F | 62°F | 0" | 0" |
| 1992 | 85°F | 53°F | 0" | 0" |
| 1991 | 88°F | 62°F | 0" | 0" |
| 1990 | 85°F | 63°F | 0.48" | 0" |
| 1989 | 83°F | 61°F | 6.2" | 0" |
| 1988 | 87°F | 66°F | 0.61" | 0" |
| 1987 | 89°F | 58°F | 0" | 0" |
| 1986 | 90°F | 66°F | 0" | 0" |
| 1985 | 92°F | 63°F | 0" | 0" |
| 1984 | 93°F | 63°F | 0" | 0" |
| 1983 | 93°F | 66°F | 0" | 0" |
| 1982 | 86°F | 56°F | 0" | 0" |
| 1981 | 82°F | 52°F | 0" | 0" |
| 1980 | 85°F | 65°F | 0" | 0" |
| 1979 | 90°F | 63°F | 0" | 0" |
| 1978 | 88°F | 57°F | 0" | 0" |
| 1977 | 95°F | 68°F | 0" | 0" |
| 1976 | 84°F | 55°F | 0" | 0" |
| 1975 | 88°F | 62°F | 0" | 0" |
| 1974 | 90°F | 66°F | 0" | 0" |
| 1973 | 87°F | 60°F | 0" | 0" |
| 1972 | 91°F | 55°F | 0" | 0" |
| 1971 | 89°F | 62°F | 0" | 0" |