Weather on October 21 at Grand Canyon
Grand Canyon National Park
Based on 55 years of data from Flagstaff, AZ
Elevation Note: Grand Canyon sits at 7,000 ft. Expect temperatures 25°F cooler than the data shown below, which comes from Flagstaff, AZ at a lower elevation.
Planning Your Visit
October 21st in Grand Canyon National Park (via Flagstaff, AZ) typically brings mild fall weather, with average highs around 61°F and lows near 29°F — a 32°F daily swing. Over 55 years of records, the warmest October 21st was in 2003 (54°F average), while the coldest was 1996 (29°F) — a 25°F range across recorded history. Precipitation has occurred on 24% of recorded October 21st dates, with snow falling 5% of the time (heaviest snowfall: 5.5"). The last decade has been 4.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.5°F warmer on this date compared to 20-30 years ago.
Planning for October 21st in Grand Canyon? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 74°F | 29°F | 0" | 0" |
| 2024 | 64°F | 29°F | 0" | 0" |
| 2023 | 74°F | 35°F | 0" | 0" |
| 2022 | 65°F | 34°F | 0" | 0" |
| 2021 | 65°F | 24°F | 0" | 0" |
| 2020 | 70°F | 30°F | 0" | 0" |
| 2019 | 66°F | 21°F | 0" | 0" |
| 2018 | 64°F | 36°F | 0" | 0" |
| 2017 | 63°F | 27°F | 0" | 0" |
| 2016 | 73°F | 27°F | 0" | 0" |
| 2015 | 53°F | 34°F | 0.76" | 0" |
| 2014 | 65°F | 33°F | 0" | 0" |
| 2013 | 62°F | 24°F | 0" | 0" |
| 2012 | 62°F | 36°F | 0" | 0" |
| 2011 | 67°F | 28°F | 0" | 0" |
| 2010 | 52°F | 33°F | 0.25" | 0" |
| 2009 | 62°F | 29°F | 0" | 0" |
| 2008 | 70°F | 27°F | 0" | 0" |
| 2007 | 47°F | 29°F | 0" | 0" |
| 2006 | 55°F | 27°F | 0" | 0" |
| 2005 | 61°F | 32°F | 0" | 0" |
| 2004 | 51°F | 32°F | 2.39" | 5.5" |
| 2003 | 75°F | 32°F | 0" | -- |
| 2002 | 60°F | 30°F | 0" | -- |
| 2001 | 65°F | 36°F | 0" | -- |
| 2000 | 59°F | 32°F | 1.35" | -- |
| 1999 | 68°F | 17°F | 0" | -- |
| 1998 | 47°F | 39°F | 1.78" | -- |
| 1997 | 59°F | 24°F | 0.03" | -- |
| 1996 | 39°F | 19°F | 0" | -- |
| 1995 | 68°F | 31°F | 0" | 0" |
| 1994 | 64°F | 24°F | 0" | 0" |
| 1993 | 64°F | 24°F | 0" | 0" |
| 1992 | 65°F | 35°F | 0" | 0" |
| 1991 | 67°F | 34°F | 0.08" | 0" |
| 1990 | 50°F | 26°F | 0" | 0" |
| 1989 | 55°F | 37°F | 0.66" | 0" |
| 1988 | 74°F | 32°F | 0" | 0" |
| 1987 | 67°F | 27°F | 0" | 0" |
| 1986 | 58°F | 20°F | 0" | 0" |
| 1985 | 57°F | 35°F | 0" | 0" |
| 1984 | 44°F | 24°F | 0.18" | 0.6" |
| 1983 | 67°F | 26°F | 0" | 0" |
| 1982 | 67°F | 24°F | 0" | 0" |
| 1981 | 64°F | 31°F | 0" | -- |
| 1980 | 62°F | 26°F | 0" | 0" |
| 1979 | 48°F | 24°F | 0.25" | 0.2" |
| 1978 | 50°F | 34°F | 0.84" | 0" |
| 1977 | 64°F | 25°F | 0" | 0" |
| 1976 | 47°F | 28°F | 0.28" | 0" |
| 1975 | 69°F | 32°F | 0" | 0" |
| 1974 | 64°F | 34°F | 0.25" | 0" |
| 1973 | 69°F | 31°F | 0" | 0" |
| 1972 | 53°F | 29°F | 0" | 0" |
| 1971 | 57°F | 25°F | 0" | 0" |