Weather on August 21 at Arches
Arches National Park
Based on 54 years of data from Moab, UT
Elevation Note: Arches sits at 4,500 ft. Expect temperatures 16°F cooler than the data shown below, which comes from Moab, UT at a lower elevation.
Planning Your Visit
August 21st in Arches National Park (via Moab, UT) typically brings hot summer weather, with average highs around 96°F and lows near 63°F — a 33°F daily swing. Over 54 years of records, the warmest August 21st was in 1992 (94°F average), while the coldest was 1980 (70°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 24% of August 21st dates historically, with the wettest August 21st recording 1.22" 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 Arches? Stay hydrated and seek shade during peak afternoon hours.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 106°F | 74°F | 0" | 0" |
| 2024 | 101°F | 68°F | 0" | 0" |
| 2023 | 98°F | 70°F | 0" | 0" |
| 2022 | 86°F | 59°F | 0.51" | 0" |
| 2021 | 87°F | 55°F | 0.08" | 0" |
| 2020 | 102°F | 66°F | 0" | 0" |
| 2019 | 101°F | 59°F | 0" | 0" |
| 2018 | 94°F | 62°F | 1.12" | 0" |
| 2017 | 95°F | 66°F | 0" | 0" |
| 2016 | 93°F | 58°F | 0" | 0" |
| 2015 | 98°F | 59°F | 0" | 0" |
| 2014 | 87°F | 56°F | 0.15" | 0" |
| 2013 | 96°F | 68°F | 0" | 0" |
| 2012 | 98°F | 64°F | 0" | 0" |
| 2011 | 98°F | 68°F | 0" | 0" |
| 2010 | 98°F | 58°F | 0" | 0" |
| 2009 | 100°F | 56°F | 0" | 0" |
| 2008 | 98°F | 59°F | 0" | 0" |
| 2007 | 100°F | 63°F | 0" | 0" |
| 2006 | 99°F | 63°F | 0" | 0" |
| 2005 | 94°F | 59°F | 0" | 0" |
| 2004 | 92°F | 64°F | 0" | 0" |
| 2003 | 100°F | 71°F | 0" | 0" |
| 2002 | 92°F | 70°F | 0" | 0" |
| 2001 | 92°F | 62°F | 0" | 0" |
| 2000 | 98°F | 60°F | 0" | 0" |
| 1999 | 89°F | 69°F | 0.51" | 0" |
| 1998 | 98°F | 71°F | 0" | -- |
| 1997 | 100°F | 66°F | 0.05" | 0" |
| 1996 | 99°F | 72°F | 0" | 0" |
| 1995 | 96°F | 63°F | 0.08" | 0" |
| 1994 | 96°F | 62°F | 1.22" | 0" |
| 1993 | 90°F | 77°F | 0" | 0" |
| 1992 | 104°F | 84°F | 0" | 0" |
| 1991 | 104°F | 64°F | 0" | 0" |
| 1990 | 98°F | 70°F | 0" | 0" |
| 1989 | 91°F | 55°F | 0" | 0" |
| 1988 | 101°F | 63°F | 0.38" | 0" |
| 1987 | 97°F | 60°F | 0" | 0" |
| 1986 | 95°F | 62°F | 0.15" | 0" |
| 1985 | 99°F | 72°F | 0" | 0" |
| 1984 | 85°F | 61°F | 0.15" | 0" |
| 1983 | 100°F | 60°F | 0" | 0" |
| 1982 | 100°F | 75°F | 0" | 0" |
| 1981 | 97°F | 60°F | 0" | 0" |
| 1980 | 94°F | 46°F | 0" | 0" |
| 1979 | 90°F | 53°F | 0" | 0" |
| 1978 | 97°F | 58°F | 0" | 0" |
| 1977 | 97°F | 64°F | 0" | 0" |
| 1976 | 98°F | 60°F | 0" | 0" |
| 1975 | 84°F | 58°F | 0" | 0" |
| 1974 | 92°F | 57°F | 0" | 0" |
| 1973 | 98°F | 65°F | 0.03" | 0" |
| 1971 | 95°F | 62°F | 0.05" | 0" |