Monthly weather forecast and climate
Great Smoky Mountains National Park, TN

Great Smoky Mountains National Park has a humid continental type of climate (Köppen climate classification Dfb) with warm, humid summers and cold winters.
The 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 19.9°F (-6.7°C) between different altitudes. Although the average high temperature stands at a warm 71.1°F (21.7°C) in the peak of July, temperatures of 80.1°F (26.7°C) to 90°F (32.2°C) are common during summer days. Average low-temperature drops to a frigid 19.9°F (-6.7°C) in the peak of January as the winter days seldom go past 39.9°F (4.4°C). Spring and fall witness temperate weather in the range of a pleasant 50°F (10°C) to 64.9°F (18.3°C).
Abundant rainfall to the tune of 76" (1930.4mm) occurs evenly throughout the year even as the snow registers a massive 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 80.1°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 19.9°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 21.9°F (-5.6°C) to 39.9°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 46.9°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 64.9°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 69.1°F (20.6°C). Weather in June »

July is the warmest month of the year and records the highest number of visitors during 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 80.1°F (26.7°C) range and a few days up to 84.9°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 64.9°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 39.9°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 »

What is the coldest month in Great Smoky Mountains National Park?

The coldest month in Great Smoky Mountains National Park is January, with an average high-temperature of 37°F (2.8°C) and an average low-temperature of 19.9°F (-6.7°C).

How many days does it rain in Great Smoky Mountains National Park?

In Great Smoky Mountains National Park, during the entire year, the rain falls for 123 days and collects up to 72.1" (1831.9mm) of precipitation.

When does it snow in Great Smoky Mountains National Park?

January through May, October through December are months with snowfall.

How many days does it snow in Great Smoky Mountains National Park?

In Great Smoky Mountains National Park, during the entire year, snow falls for 27 days, and aggregates up to 81.5" (2070.4mm) of snow.

When does it snow the most in Great Smoky Mountains National Park?

The month with the most snowfall in Great Smoky Mountains National Park, Tennessee, is February when snow falls for 6 days and typically aggregates up to 18.1" (460mm) of snow.

What is the warmest month in Great Smoky Mountains National Park?

July is the warmest month in Great Smoky Mountains National Park, Tennessee, with an average high-temperature of 71.1°F (21.7°C) and an average low-temperature of 55°F (12.8°C).

What is the wettest month in Great Smoky Mountains National Park?

July is the month with the most rainfall. Rain falls for 14 days and accumulates 7.6" (193.2mm) of precipitation.

What is the driest month in Great Smoky Mountains National Park?

The month with the least rainfall in Great Smoky Mountains National Park is October when the rain falls for 8 days and typically collects 4.3" (110.3mm) of precipitation.
Average temperature - Great Smoky Mountains National Park, TN
Average rainfall - Great Smoky Mountains National Park, TN

The wettest month (with the highest rainfall) is July (193.2mm).
The driest month (with the lowest rainfall) is October (110.3mm).

Average rainfall days - Great Smoky Mountains National Park, TN

The month with the highest number of rainy days is July (14 days).
Months with the lowest number of rainy days are September, October and November (8 days).

Average snowfall - Great Smoky Mountains National Park, TN

The month with the highest snowfall is February (460mm).
Months with the lowest snowfall are June, July, August and September (0mm).

Average snowfall days - Great Smoky Mountains National Park, TN

The month with the highest number of snowfall days is January (7 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average daylight / Average sunshine - Great Smoky Mountains National Park, TN
Average UV index - Great Smoky Mountains National Park, TN
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