Weather on December 20 at Great Smoky Mountains
Great Smoky Mountains National Park
Based on 55 years of data from Gatlinburg, TN
Elevation Note: Great Smoky Mountains sits at 4,900 ft. Expect temperatures 17°F cooler than the data shown below, which comes from Gatlinburg, TN at a lower elevation.
Planning Your Visit
December 20th in Great Smoky Mountains National Park (via Gatlinburg, TN) typically brings cool winter weather, with average highs around 50°F and lows near 26°F. Over 55 years of records, the warmest December 20th was in 1984 (60°F average), while the coldest was 1996 (18°F) — a 42°F range across recorded history. Precipitation has occurred on 51% of recorded December 20th dates, with snow falling 9% of the time (heaviest snowfall: 3"). The last decade has been 2.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.6°F warmer on this date compared to 20-30 years ago.
Planning for December 20th in Great Smoky Mountains? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 48°F | 24°F | 0" | 0" |
| 2024 | 42°F | 35°F | 0" | 0" |
| 2023 | 37°F | 21°F | 0" | 0" |
| 2022 | 44°F | 22°F | 0" | 0" |
| 2021 | 44°F | 31°F | 0.69" | 0" |
| 2020 | 46°F | 24°F | 0.05" | 0" |
| 2019 | 42°F | 25°F | 0" | 0" |
| 2018 | 51°F | 30°F | 0" | 0" |
| 2017 | 57°F | 35°F | 1.57" | 0" |
| 2016 | 40°F | 28°F | 0" | 0" |
| 2015 | 45°F | 22°F | 0" | 0" |
| 2014 | 45°F | 34°F | 0.03" | 0" |
| 2013 | 54°F | 25°F | 0" | 0" |
| 2012 | 64°F | 34°F | 0.03" | 0" |
| 2011 | 54°F | 25°F | 0" | 0" |
| 2010 | 37°F | 19°F | 0" | 0" |
| 2009 | 36°F | 31°F | 0.74" | 1.5" |
| 2008 | 70°F | 46°F | 0" | 0" |
| 2007 | 49°F | 27°F | 0.15" | 0" |
| 2006 | 70°F | 31°F | 0.05" | 0" |
| 2005 | 40°F | 25°F | 0" | 0" |
| 2004 | 33°F | 7°F | 0.25" | 1.5" |
| 2003 | 34°F | 19°F | 0.53" | 3" |
| 2002 | 67°F | 43°F | 1.88" | 0" |
| 2001 | 59°F | 29°F | 0.08" | 0" |
| 2000 | 33°F | 7°F | 0.13" | 0.5" |
| 1999 | 62°F | 24°F | 0.03" | 0" |
| 1998 | 42°F | 32°F | 0.38" | 0" |
| 1997 | 60°F | 24°F | 0" | 0" |
| 1996 | 24°F | 13°F | 0.05" | 0.8" |
| 1995 | 63°F | 27°F | 0.91" | 0" |
| 1994 | 46°F | 23°F | 0" | 0" |
| 1993 | 46°F | 26°F | 0" | 0" |
| 1992 | 63°F | 30°F | 2.59" | 0" |
| 1991 | 38°F | 15°F | 0" | 0" |
| 1990 | 55°F | 37°F | 0" | 0" |
| 1989 | 34°F | 20°F | 0.25" | 0" |
| 1988 | 63°F | 26°F | 0" | 0" |
| 1987 | 62°F | 28°F | 0.15" | 0" |
| 1986 | 46°F | 23°F | 0" | 0" |
| 1985 | 36°F | 12°F | 0" | 0" |
| 1984 | 68°F | 51°F | 0.41" | 0" |
| 1983 | 40°F | 24°F | 0" | 0" |
| 1982 | 50°F | 23°F | 1.27" | 0" |
| 1981 | 29°F | -- | 0" | 0" |
| 1980 | 51°F | 18°F | 0" | 0" |
| 1979 | 59°F | 21°F | 0" | 0" |
| 1978 | 61°F | 40°F | 0.03" | 0" |
| 1977 | 62°F | 21°F | 0.15" | 0" |
| 1976 | 67°F | 29°F | 0.91" | 0" |
| 1975 | 39°F | 5°F | 0" | 0" |
| 1974 | 56°F | 27°F | 0" | 0" |
| 1973 | 58°F | 25°F | 0.51" | 0" |
| 1972 | 57°F | 23°F | 0.15" | 0" |
| 1971 | 61°F | 20°F | 0.76" | 0" |
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See historical weather for other dates
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