Climate and monthly weather forecast
Westlyn, TN

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Weather in January

January, like December, is a frosty winter month in Westlyn, Tennessee, with an average temperature fluctuating between 29.7°F (-1.3°C) and 44.8°F (7.1°C). With average high temperatures of 44.8°F (7.1°C) and lows of 29.7°F (-1.3°C), January is the coldest month. Weather in January »

Weather in February

The last month of the winter, February, is a cool month in Westlyn, Tennessee, with an average temperature varying between 33.6°F (0.9°C) and 50°F (10°C). February notes an average high-temperature of a cool 50°F (10°C), subtly differing from January's 44.8°F (7.1°C). Weather in February »

Weather in March

The first month of the spring, March, is a moderate month in Westlyn, Tennessee, with an average temperature fluctuating between 40.5°F (4.7°C) and 58.1°F (14.5°C). The shift from February to March introduces a subtle increase in the average high-temperature, moving from a cool 50°F (10°C) to a moderate 58.1°F (14.5°C). Weather in March »

Weather in April

April in Westlyn, Tennessee, is a pleasant spring month, with an average temperature varying between 48.2°F (9°C) and 69.1°F (20.6°C). Noticing a change, the average high-temperature during April moves from March's moderate 58.1°F (14.5°C) to an agreeable 69.1°F (20.6°C). Weather in April »

Weather in May

The last month of the spring, May, is a warm month in Westlyn, Tennessee, with an average temperature varying between 55.8°F (13.2°C) and 77.9°F (25.5°C). May comes with a subtle rise, with the average high-temperature adjusting from a pleasant 69.1°F (20.6°C) in April to a warm 77.9°F (25.5°C). Weather in May »

Weather in June

June, the first month of the summer in Westlyn, is still a warm month, with temperature in the range of an average high of 85.1°F (29.5°C) and an average low of 62.4°F (16.9°C). The start of June brings a subtle shift in the average high-temperature, edging up from May's moderately hot 77.9°F (25.5°C) to a still warm 85.1°F (29.5°C). Weather in June »

Weather in July

July is a tropical summer month in Westlyn, Tennessee, with temperature in the range of an average low of 66°F (18.9°C) and an average high of 87.8°F (31°C). Westlyn's warmest month, July, registers temperatures that range from a high of 87.8°F (31°C) to a low of 66°F (18.9°C). The average heat index in July is estimated at a torrid 102.2°F (39°C). Weather in July »

Weather in August

The last month of the summer, August, is another tropical month in Westlyn, Tennessee, with temperature in the range of an average low of 65.1°F (18.4°C) and an average high of 87.1°F (30.6°C). The beginning of August records an average high-temperature of a still hot 87.1°F (30.6°C), marking a negligible difference from July's 87.8°F (31°C). Weather in August »

Weather in September

September, the first month of the autumn in Westlyn, is still a warm month, with an average temperature varying between 60.1°F (15.6°C) and 81.3°F (27.4°C). A minor decrease in the average high-temperature is observed during September, shifting from a hot 87.1°F (30.6°C) in August to a warm 81.3°F (27.4°C). Weather in September »

Weather in October

October, like September, is an agreeable autumn month in Westlyn, Tennessee, with an average temperature fluctuating between 48.9°F (9.4°C) and 69.1°F (20.6°C). A change in temperatures is noted as September gives way to October, with average highs reducing from a moderately hot 81.3°F (27.4°C) to a pleasant 69.1°F (20.6°C). Weather in October »

Weather in November

November, the last month of the autumn in Westlyn, is another refreshing month, with an average temperature ranging between min 39.2°F (4°C) and max 57°F (13.9°C). In Westlyn, the beginning of November is marked by a lowered average high-temperature, shifting from October's pleasant 69.1°F (20.6°C) to a refreshing 57°F (13.9°C). Weather in November »

Weather in December

The first month of the winter, December, is still a chilly month in Westlyn, Tennessee, with an average temperature varying between 35.4°F (1.9°C) and 49.1°F (9.5°C). A minor decrease in the average high-temperature is observed during December, shifting from a mild 57°F (13.9°C) in November to a frosty 49.1°F (9.5°C). Weather in December »
Updated: Aug 22, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest month in Westlyn?

In Westlyn, January is known for its average lowest temperatures, reaching a high of 44.8°F (7.1°C) and a low of 29.7°F (-1.3°C).

How many days does it rain in Westlyn?

Throughout the year, in Westlyn, there are 177.6 rainfall days, and 37.91" (963mm) of precipitation is accumulated.

When does it snow?

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

How much does it snow?

Throughout the year, there are 19 snowfall days, and 5.59" (142mm) of snow is accumulated.

What is the month with the least sunshine?

January has the least sunshine of the year in Westlyn, with an average of 5.1h of sunshine.

What is the month with the lowest UV index?

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

What is the rainiest month?

February is the month with the most rainfall. Rain falls for 13.8 days and accumulates 4.33" (110mm) of precipitation.

When does it snow the most?

February is the month with the most snowfall. Snow falls for 5.4 days and accumulates 1.93" (49mm) of snow.

When is Daylight Saving Time (DST) in Westlyn?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.

When it does not snow?

May through September are months without snowfall.

What is the month with the highest UV index?

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

When are the longest days?

June has the longest days of the year, with an average of 14h and 36min of daylight.

What month has the most sunshine?

The month with the most sunshine is June, with an average of 10.7h of sunshine.

What are the warmest months in Westlyn?

July is the month that records the highest temperatures, with averages ranging from a high of 87.8°F (31°C) to a low of 66°F (18.9°C).

What is the least humid month?

August is the least humid month, with an average relative humidity of 72%.

What is the driest month?

The month with the least rainfall is September, when the rain falls for 12.6 days and typically collects 1.97" (50mm) of precipitation.

What is the most humid month?

The most humid month is December, with an average relative humidity of 79%.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 48min of daylight.

Average temperature
Westlyn, TN

Average temperature - Westlyn, TN

The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is January (44.8°F).

The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (29.7°F).

Average pressure
Westlyn, TN

Average pressure - Westlyn, TN

The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).

Average wind speed
Westlyn, TN

Average wind speed - Westlyn, TN

The windiest month (with the highest average wind speed) is April (6mph).
The calmest month (with the lowest average wind speed) is August (3.6mph).

Average humidity
Westlyn, TN

Average humidity - Westlyn, TN

The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is August (72%).

Average rainfall
Westlyn, TN

Average rainfall - Westlyn, TN

The wettest month (with the highest rainfall) is February (4.33").
The driest month (with the least rainfall) is September (1.97").

Average rainfall days
Westlyn, TN

Average rainfall days - Westlyn, TN

The month with the highest number of rainy days is July (18.6 days).
The month with the least rainy days is November (10.3 days).

Average snowfall
Westlyn, TN

Average snowfall - Westlyn, TN

The month with the highest snowfall is February (1.93").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days
Westlyn, TN

Average snowfall days - Westlyn, TN

The month with the highest number of snowfall days is January (5.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight / Average sunshine
Westlyn, TN

Average daylight / Average sunshine - Westlyn, TN

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).

The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).

Average sunshine days
Westlyn, TN

Average sunshine days - Westlyn, TN

The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is July (10.3 days).

Average UV index
Westlyn, TN

Average UV index - Westlyn, 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).

Average visibility
Westlyn, TN

Average visibility - Westlyn, TN

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

Westlyn, Tennessee, USA

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