Climate and monthly weather forecast
Signal Mountain, TN

Weather in January

January, like December, is a frosty winter month in Signal Mountain, Tennessee, with an average temperature fluctuating between 30.6°F (-0.8°C) and 45.1°F (7.3°C). The coldest month is January, with an average high-temperature of 45.1°F (7.3°C) and an average low-temperature of 30.6°F (-0.8°C). Weather in January »

Weather in February

February, the last month of the winter in Signal Mountain, is a fresh month, with an average temperature fluctuating between 50.4°F (10.2°C) and 34.9°F (1.6°C). In Signal Mountain, the average high-temperature in February is practically the same as in January - a cool 50.4°F (10.2°C). Weather in February »

Weather in March

The first month of the spring, March, is a moderate month in Signal Mountain, Tennessee, with an average temperature fluctuating between 41.4°F (5.2°C) and 58.5°F (14.7°C). In March, the average high-temperature marginally rises from a fresh 50.4°F (10.2°C) in February to a moderate 58.5°F (14.7°C). Weather in March »

Weather in April

April in Signal Mountain, Tennessee, is a pleasant spring month, with an average temperature varying between 49.1°F (9.5°C) and 68.9°F (20.5°C). In April, the average high-temperature increases from a moderate 58.5°F (14.7°C) in March to an agreeable 68.9°F (20.5°C). Weather in April »

Weather in May

May, the last month of the spring in Signal Mountain, is a moderately hot month, with an average temperature varying between 56.8°F (13.8°C) and 77°F (25°C). In May, the average high-temperature marginally rises from an agreeable 68.9°F (20.5°C) in April to a warm 77°F (25°C). Weather in May »

Weather in June

June, the first month of the summer in Signal Mountain, is also a moderately hot month, with temperature in the range of an average high of 84.7°F (29.3°C) and an average low of 63.9°F (17.7°C). In June, the average high-temperature slightly increases from 77°F (25°C) in May to a still moderately hot 84.7°F (29.3°C). Weather in June »

Weather in July

July is a hot summer month in Signal Mountain, Tennessee, with an average temperature varying between 66.6°F (19.2°C) and 87.1°F (30.6°C). July is the warmest month, with an average high-temperature of 87.1°F (30.6°C) and an average low-temperature of 66.6°F (19.2°C). The average heat index in July is estimated at a very hot 100.4°F (38°C). Weather in July »

Weather in August

The last month of the summer, August, is another tropical month in Signal Mountain, Tennessee, with an average temperature ranging between max 86.5°F (30.3°C) and min 65.8°F (18.8°C). In August, the average high-temperature is practically the same as in July - a still hot 86.5°F (30.3°C). Weather in August »

Weather in September

September, the first month of the autumn in Signal Mountain, is still a warm month, with an average temperature varying between 80.8°F (27.1°C) and 60.4°F (15.8°C). In Signal Mountain, the average high-temperature in September marginally drops from a tropical 86.5°F (30.3°C) in August to a moderately hot 80.8°F (27.1°C). Weather in September »

Weather in October

October, like September, is another pleasant autumn month in Signal Mountain, Tennessee, with an average temperature ranging between min 49.3°F (9.6°C) and max 69.1°F (20.6°C). In October, the average high-temperature drops from a warm 80.8°F (27.1°C) in September to a pleasant 69.1°F (20.6°C). Weather in October »

Weather in November

November, the last month of the autumn in Signal Mountain, is also a moderate month, with an average temperature fluctuating between 57°F (13.9°C) and 39.4°F (4.1°C). In November, the average high-temperature decreases from a pleasant 69.1°F (20.6°C) in October to a moderate 57°F (13.9°C). Weather in November »

Weather in December

December, the first month of the winter in Signal Mountain, is also a frosty month, with an average temperature ranging between min 35.8°F (2.1°C) and max 49.3°F (9.6°C). In December, the average high-temperature slightly decreases from a mild 57°F (13.9°C) in November to a frosty 49.3°F (9.6°C). Weather in December »
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FAQ

What is the coldest month in Signal Mountain?

January is the coldest month, with an average high-temperature of 45.1°F (7.3°C) and an average low-temperature of 30.6°F (-0.8°C).

How much does it rain in Signal Mountain?

Throughout the year, in Signal Mountain, there are 187.2 rainfall days, and 44.09" (1120mm) of precipitation is accumulated.

When does it snow in Signal Mountain?

Months with snowfall are January through April, November and December.

How many days does it snow in Signal Mountain?

In Signal Mountain, Tennessee, during the entire year, snow falls for 17.1 days and aggregates up to 5.08" (129mm) of snow.

When is the lowest UV index in Signal Mountain?

The months with the lowest UV index in Signal Mountain are January, February and December, with an average maximum UV index of 2.

When does it snow the most in Signal Mountain?

February is the month with the most snowfall in Signal Mountain. Snow falls for 5.1 days and accumulates 2.01" (51mm) of snow.

When is Daylight Saving Time (DST) in Signal Mountain?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from EDT to EST.

When it does not snow in Signal Mountain?

In Signal Mountain, Tennessee, snow does not fall in May through October.

What is the month with the highest UV index in Signal Mountain?

May through August, with an average maximum UV index of 6, are months with the highest UV index in Signal Mountain.

What are the least humid months in Signal Mountain?

June through November, with an average relative humidity of 76%, are the least humid months in Signal Mountain, Tennessee.

When are the longest days in Signal Mountain?

The month with the longest days in Signal Mountain is June, with an average of 14h and 29min of daylight.

What month has the most sunshine in Signal Mountain?

With an average of 10.3h of sunshine, June has the most sunshine of the year in Signal Mountain.

What is the warmest month in Signal Mountain?

The warmest month in Signal Mountain is July, with an average high-temperature of 87.1°F (30.6°C) and an average low-temperature of 66.6°F (19.2°C).

What is the driest month in Signal Mountain?

The month with the least rainfall in Signal Mountain, Tennessee, is September, when the rain falls for 13.5 days and typically collects 2.76" (70mm) of precipitation.

What is the most humid month in Signal Mountain?

The most humid month is December, with an average relative humidity of 81%.

What is the rainiest month in Signal Mountain?

The month with the most rainfall in Signal Mountain is December, when the rain falls for 14.5 days and typically aggregates up to 4.53" (115mm) of precipitation.

What is the month with the shortest days in Signal Mountain?

With an average of 9h and 50min of daylight, December has the shortest days of the year.

What is the month with the least sunshine in Signal Mountain?

The month with the least sunshine is December, with an average of 4.9h of sunshine.

Average temperature
Signal Mountain, TN

Average temperature - Signal Mountain, TN

The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (45.1°F).

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).

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Average pressure
Signal Mountain, TN

Average pressure - Signal Mountain, TN

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).

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Average wind speed
Signal Mountain, TN

Average wind speed - Signal Mountain, TN

The windiest month (with the highest average wind speed) is February (6.5mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).

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Average humidity
Signal Mountain, TN

Average humidity - Signal Mountain, TN

The month with the highest relative humidity is December (81%).
The months with the lowest relative humidity are June, July, August, September, October and November (76%).

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Average rainfall
Signal Mountain, TN

Average rainfall - Signal Mountain, TN

The wettest month (with the highest rainfall) is December (4.53").
The driest month (with the least rainfall) is September (2.76").

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Average rainfall days
Signal Mountain, TN

Average rainfall days - Signal Mountain, TN

The month with the highest number of rainy days is July (21.3 days).
The month with the least rainy days is November (10.5 days).

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Average snowfall
Signal Mountain, TN

Average snowfall - Signal Mountain, TN

The month with the highest snowfall is February (2.01").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days
Signal Mountain, TN

Average snowfall days - Signal Mountain, TN

The month with the highest number of snowfall days is January (5.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight / Average sunshine
Signal Mountain, TN

Average daylight / Average sunshine - Signal Mountain, TN

The month with the longest days is June (Average daylight: 14h and 29min).
The month with the shortest days is December (Average daylight: 9h and 50min).

The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).

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Average sunshine days
Signal Mountain, TN

Average sunshine days - Signal Mountain, TN

The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is July (7.7 days).

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Average UV index
Signal Mountain, TN

Average UV index - Signal Mountain, TN

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).

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Average visibility
Signal Mountain, TN

Average visibility - Signal Mountain, TN

The months with the highest visibility are June, October and November (6mi).
The months with the lowest visibility are January, February, March, April, May, July, August, September and December (5mi).

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