Great Smoky Mountains National Park
Tennessee, USA
Long-term weather forecast
Long-term weather forecast
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Monthly weather forecast and Climate
Great Smoky Mountains National Park, TN

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Great Smoky Mountains National Park has a humid continental type of climate (Köppen climate classification Dfb) with warm, humid summers and cold winters.
National park lies in the states of Tennessee and North Carolina and comprises the Great Smoky Mountains and a part of the Blue Ridge Mountains, which is a fragment of the Appalachian Mountain Chain. The park has about 36 percent of its forestlands in the form of old growth, deciduous and temperate forests that give it a rich diversity of flora and fauna.

Great Smoky has a diverse topography with elevations that range from lowlands to 2000 meters above sea level, which results in temperatures that vary up to 20°F (-6.7°C) between different altitudes. Although the average high temperature stands at a warm 71°F (21.7°C) in the peak of July, temperatures of 80°F (26.7°C) to 90°F (32.2°C) are common during summer days. Average low-temperature drops to a frigid 20°F (-6.7°C) in the peak of January as the winter days seldom go past 40°F (4.4°C). Spring and fall witness temperate weather in the range of a pleasant 50°F (10°C) to 65°F (18.3°C).
Abundant rainfall to the tune of 76" (1930.4mm) occurs evenly throughout the year even as the snow registers a heavy 80" (2032mm) during the cold winter.
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The best time to visit Great Smoky Mountains National Park is from June to October during the summer and the autumn seasons.
The park ranks as number one in the United States regarding national park visitor numbers - while summer draws vacation crowds with a combination of warm and hot days that cross 80°F (26.7°C) and temperate nights, the fall season entices tourists with its beautiful colors, particularly in October. Spring is mild as occasional snow accumulation, or a winter storm is still a factor in March.

November to February in the peak of winter is the worst time to visit Great Smoky Mountains National Park as the winter months are cold with heavy snow logging.
Tourist numbers shrink as many trails close for the winter along with visitor attractions as the ground is white and the roads become inaccessible. Cold dampens the spirits of any remaining visitors as the temperatures often drop to the frigid levels below 25°F (-3.9°C) and the conditions become inhospitable.

Great Smoky is prone to forest fires and lightning during the summer. Forest fires are most common in June at low and mid-level elevations that comprise mainly of oak and pine trees. Lightning is the chief cause of the fires with an average of two strikes per year. Forest fires close sections of the park to visitors but are essential to dispose of dead vegetation and support the ecosystems to maintain the natural diversity of plants and animals.

January is the coldest month in Great Smoky with the average temperatures in the range of a cold 20°F (-6.7°C) to 37°F (2.8°C). Weather in January »

February is the snowiest month with an accumulation of 18.2" (462.3mm) that sees average temperatures in the cold range of 22°F (-5.6°C) to 40°F (4.4°C). Weather in February »

March is cold and accumulates a large amount of snow up to 16.8" (426.7mm) with average temperatures in the range of 28°F (-2.2°C) to 47°F (8.3°C). Weather in March »

April sees spring blossom in Great Smoky with an explosion of wildflowers as the temperatures rise to an average of 37°F (2.8°C) to 57°F (13.9°C). Weather in April »

May brings Great Smoky to life with average temperatures in a comfortable 45°F (7.2°C) to 65°F (18.3°C) range. Except for the higher altitudes and mountain peaks, most of the park is free of snowfall. Weather in May »

June is the start of the busy tourist season as summer is an excellent time in Great Smoky with pleasant average temperatures in the range of 52°F (11.1°C) to 69°F (20.6°C). Weather in June »

July is the warmest month of the year and records the highest number of visitors in the year and across national parks in the United States. Weather in July »

August is another beautiful summer month with day temperatures in the 70°F (21.1°C) to 80°F (26.7°C) range and a few days up to 85°F (29.4°C). Weather in August »

September transitions to wonderful autumn and is a popular month to visit Great Smoky with balmier average temperatures in the 50°F (10°C) to 65°F (18.3°C) range. Weather in September »

October is a lovely fall month that sees the last of the busy tourist season with mild temperatures in the 40°F (4.4°C) to 57°F (13.9°C). Weather in October »

November is a transitional month from fall to winter that sees average temperatures in the cold 30°F (-1.1°C) to 48°F (8.9°C) range. Weather in November »

December is a cold month with the average temperatures in the range of a cold 25°F (-3.9°C) to 41°F (5°C). Weather in December »
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