Weather on September 20 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
September 20th in Grand Canyon National Park (via Flagstaff, AZ) typically brings pleasant fall weather, with average highs around 72°F and lows near 41°F — a 31°F daily swing. Over 55 years of records, the warmest September 20th was in 2010 (63°F average), while the coldest was 1971 (44°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 15% of September 20th dates historically, with the wettest September 20th recording 1.83" 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 September 20th in Grand Canyon? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 73°F | 44°F | 0.76" | 0" |
| 2024 | 70°F | 36°F | 0" | 0" |
| 2023 | 69°F | 34°F | 0" | 0" |
| 2022 | 70°F | 51°F | 0.36" | 0" |
| 2021 | 75°F | 41°F | 0" | 0" |
| 2020 | 79°F | 41°F | 0" | 0" |
| 2019 | 69°F | 39°F | 0" | 0" |
| 2018 | 75°F | 44°F | 0" | 0" |
| 2017 | 71°F | 37°F | 0" | 0" |
| 2016 | 65°F | 51°F | 1.22" | 0" |
| 2015 | 80°F | 44°F | 0" | 0" |
| 2014 | 78°F | 47°F | 0" | 0" |
| 2013 | 75°F | 39°F | 0" | 0" |
| 2012 | 79°F | 41°F | 0" | 0" |
| 2011 | 77°F | 40°F | 0" | 0" |
| 2010 | 79°F | 47°F | 0" | 0" |
| 2009 | 75°F | 46°F | 0" | 0" |
| 2008 | 74°F | 43°F | 0" | 0" |
| 2007 | 69°F | 38°F | 0" | 0" |
| 2006 | 64°F | 35°F | 0" | 0" |
| 2005 | 79°F | 44°F | 0" | 0" |
| 2004 | 57°F | 43°F | 0.03" | 0" |
| 2003 | 76°F | 37°F | 0" | -- |
| 2002 | 75°F | 35°F | 0" | -- |
| 2001 | 79°F | 40°F | 0" | -- |
| 2000 | 83°F | 41°F | 0" | -- |
| 1999 | 71°F | 45°F | 0" | -- |
| 1998 | 70°F | 51°F | 0" | -- |
| 1997 | 73°F | 43°F | 0" | -- |
| 1996 | 70°F | 32°F | 0" | -- |
| 1995 | 76°F | 39°F | 0" | 0" |
| 1994 | 63°F | 46°F | 1.83" | 0" |
| 1993 | 74°F | 31°F | 0" | 0" |
| 1992 | 75°F | 47°F | 0" | 0" |
| 1991 | 74°F | 45°F | 0.33" | 0" |
| 1990 | 62°F | 45°F | 1.14" | 0" |
| 1989 | 71°F | 32°F | 0" | 0" |
| 1988 | 71°F | 39°F | 0" | 0" |
| 1987 | 78°F | 33°F | 0" | 0" |
| 1986 | 68°F | 49°F | 0" | 0" |
| 1985 | 57°F | 33°F | 0" | 0" |
| 1984 | 78°F | 44°F | 0" | 0" |
| 1983 | 72°F | 48°F | 0" | 0" |
| 1982 | 78°F | 40°F | 0" | 0" |
| 1981 | 77°F | 46°F | 0" | 0" |
| 1980 | 76°F | 41°F | 0" | 0" |
| 1979 | 73°F | 39°F | 0" | 0" |
| 1978 | 60°F | 33°F | 0" | 0" |
| 1977 | 70°F | 43°F | 0" | 0" |
| 1976 | 78°F | 45°F | 0" | 0" |
| 1975 | 77°F | 43°F | 0.05" | 0" |
| 1974 | 66°F | 43°F | 0" | 0" |
| 1973 | 77°F | 39°F | 0" | 0" |
| 1972 | 68°F | 30°F | 0" | 0" |
| 1971 | 64°F | 23°F | 0" | 0" |