Weather on October 18 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 18th in Grand Canyon National Park (via Flagstaff, AZ) typically brings mild fall weather, with average highs around 64°F and lows near 31°F — a 33°F daily swing. Over 55 years of records, the warmest October 18th was in 1991 (58°F average), while the coldest was 1971 (22°F) — a 36°F range across recorded history. Precipitation has occurred on 15% of recorded October 18th dates, with snow falling 4% of the time (heaviest snowfall: 1.5"). The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
Planning for October 18th in Grand Canyon? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 67°F | 28°F | 0" | 0" |
| 2024 | 53°F | 32°F | 3.68" | 0.3" |
| 2023 | 76°F | 36°F | 0" | 0" |
| 2022 | 61°F | 39°F | 0" | 0" |
| 2021 | 54°F | 32°F | 0" | 0" |
| 2020 | 75°F | 37°F | 0" | 0" |
| 2019 | 63°F | 33°F | 0" | 0" |
| 2018 | 54°F | 25°F | 0" | 0" |
| 2017 | 72°F | 33°F | 0" | 0" |
| 2016 | 65°F | 38°F | 0" | 0" |
| 2015 | 60°F | 42°F | 0.18" | 0" |
| 2014 | 68°F | 39°F | 0" | 0" |
| 2013 | 59°F | 23°F | 0" | 0" |
| 2012 | 72°F | 27°F | 0" | 0" |
| 2011 | 66°F | 28°F | 0" | 0" |
| 2010 | 64°F | 36°F | 0.03" | 0" |
| 2009 | 73°F | 37°F | 0" | 0" |
| 2008 | 68°F | 29°F | 0" | 0" |
| 2007 | 63°F | 29°F | 0" | 0" |
| 2006 | 48°F | 22°F | 0" | 0" |
| 2005 | 53°F | 35°F | 2.95" | 0" |
| 2004 | 48°F | 41°F | 0.03" | 0" |
| 2003 | 76°F | 31°F | 0" | -- |
| 2002 | 55°F | 34°F | 0" | -- |
| 2001 | 71°F | 30°F | 0" | -- |
| 2000 | 66°F | 26°F | 0" | -- |
| 1999 | 62°F | 24°F | 0" | -- |
| 1998 | 58°F | 26°F | 0" | -- |
| 1997 | 66°F | 29°F | 0" | -- |
| 1996 | 65°F | 28°F | 0" | -- |
| 1995 | 70°F | 31°F | 0" | 0" |
| 1994 | 53°F | 24°F | 0" | 0" |
| 1993 | 53°F | 30°F | 0.18" | 0" |
| 1992 | 73°F | 35°F | 0" | 0" |
| 1991 | 77°F | 39°F | 0" | 0" |
| 1990 | 68°F | 32°F | 0" | 0" |
| 1989 | 63°F | 27°F | 0" | 0" |
| 1988 | 75°F | 34°F | 0" | 0" |
| 1987 | 68°F | 30°F | 0" | 0" |
| 1986 | 58°F | 32°F | 0" | 0" |
| 1985 | 65°F | 35°F | 0" | 0" |
| 1984 | 52°F | 22°F | 0" | 0" |
| 1983 | 65°F | 33°F | 0" | 0" |
| 1982 | 66°F | 26°F | 0" | 0" |
| 1981 | 60°F | 36°F | 0" | -- |
| 1980 | 52°F | 22°F | 0" | 0" |
| 1979 | 58°F | 25°F | 0" | 0" |
| 1978 | 68°F | 33°F | 0" | 0" |
| 1977 | 76°F | 31°F | 0" | 0" |
| 1976 | 65°F | 34°F | 0" | 0" |
| 1975 | 72°F | 28°F | 0" | 0" |
| 1974 | 75°F | 29°F | 0" | 0" |
| 1973 | 76°F | 32°F | 0" | 0" |
| 1972 | 51°F | 45°F | 3.53" | 0" |
| 1971 | 34°F | 10°F | 0.51" | 1.5" |