Weather on December 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
December 18th in Grand Canyon National Park (via Flagstaff, AZ) typically brings chilly winter weather, with average highs around 44°F and lows near 18°F — a 26°F daily swing. Over 55 years of records, the warmest December 18th was in 2025 (46°F average), while the coldest was 1992 (19°F) — a 27°F range across recorded history. Precipitation has occurred on 24% of recorded December 18th dates, with snow falling 22% of the time (heaviest snowfall: 5.3"). The last decade has been 1.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.1°F warmer on this date compared to 20-30 years ago.
Planning for December 18th in Grand Canyon? Bring layers as temperatures can vary throughout the day. Check road conditions if traveling, as snow is possible.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 62°F | 30°F | 0" | 0" |
| 2024 | 54°F | 24°F | 0" | 0" |
| 2023 | 57°F | 21°F | 0" | 0" |
| 2022 | 36°F | 14°F | 0" | 0" |
| 2021 | 35°F | 16°F | 0" | 0" |
| 2020 | 40°F | 14°F | 0" | 0" |
| 2019 | 38°F | 15°F | 0" | 0" |
| 2018 | 49°F | 20°F | 0" | 0" |
| 2017 | 50°F | 13°F | 0" | 0" |
| 2016 | 30°F | 9°F | 0" | 0" |
| 2015 | 51°F | 10°F | 0" | 0" |
| 2014 | 36°F | 17°F | 0.51" | 2" |
| 2013 | 52°F | 24°F | 0" | 0" |
| 2012 | 34°F | 30°F | 0.76" | 1.6" |
| 2011 | 38°F | 27°F | 0.41" | 1.5" |
| 2010 | 37°F | 32°F | 0.18" | 0.5" |
| 2009 | 44°F | 12°F | 0" | 0" |
| 2008 | 35°F | 24°F | 1.22" | 4.4" |
| 2007 | 39°F | 12°F | 0" | 0" |
| 2006 | 32°F | 19°F | 0.48" | 5.3" |
| 2005 | 40°F | 17°F | 0" | 0" |
| 2004 | 46°F | 30°F | 0" | 0" |
| 2003 | 50°F | 14°F | 0" | -- |
| 2002 | 29°F | 20°F | 0.74" | -- |
| 2001 | 50°F | 10°F | 0" | 0" |
| 2000 | 40°F | 23°F | 0" | 0" |
| 1999 | 53°F | 13°F | 0" | -- |
| 1998 | 48°F | 24°F | 0" | -- |
| 1997 | 43°F | 20°F | 0" | -- |
| 1996 | 33°F | 11°F | 0" | -- |
| 1995 | 41°F | 16°F | 0" | 0" |
| 1994 | 54°F | 15°F | 0" | 0" |
| 1993 | 45°F | 12°F | 0" | 0" |
| 1992 | 28°F | 11°F | 0.41" | 3.7" |
| 1991 | 36°F | 32°F | 0.81" | 0.6" |
| 1990 | 42°F | 13°F | 0" | 0" |
| 1989 | 42°F | 10°F | 0" | 0" |
| 1988 | 51°F | 22°F | 0.13" | 0.5" |
| 1987 | 38°F | 21°F | 0.69" | 3.2" |
| 1986 | 43°F | 21°F | 0" | 0" |
| 1985 | 49°F | 21°F | 0" | 0" |
| 1984 | 38°F | 20°F | 0" | 0" |
| 1983 | 48°F | 21°F | 0" | 0" |
| 1982 | 57°F | 19°F | 0" | 0" |
| 1981 | 58°F | 19°F | 0" | 0" |
| 1980 | 56°F | 29°F | 0" | 0" |
| 1979 | 58°F | 13°F | 0" | 0" |
| 1978 | 40°F | 31°F | 6.73" | 0.7" |
| 1977 | 40°F | 28°F | 0.46" | 1.2" |
| 1976 | 51°F | 15°F | 0" | 0" |
| 1975 | 38°F | 6°F | 0" | 0" |
| 1974 | 48°F | 10°F | 0" | 0" |
| 1973 | 45°F | 22°F | 0" | 0" |
| 1972 | 51°F | 16°F | 0" | 0" |
| 1971 | 35°F | 7°F | 0" | 0" |