January weather forecast
Johnson City, TN

The front entrance to the Public Library in Johnson City, Tennessee
The front entrance to the Public Library in Johnson City, Tennessee

Weather in January

January, like December, in Johnson City, Tennessee, is a wintry winter month, with an average temperature fluctuating between 26.6°F (-3°C) and 41.5°F (5.3°C).

Temperature

January is the coldest month, with an average high-temperature of 41.5°F (5.3°C) and an average low-temperature of 26.6°F (-3°C).

Humidity

The average relative humidity in January is 78%.

Rainfall

In Johnson City, in January, during 13.8 rainfall days, 2.6" (66mm) of precipitation is typically accumulated. Throughout the year, in Johnson City, there are 187.8 rainfall days, and 32.76" (832mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, October through December. In Johnson City, in January, snow falls for 8.9 days, with typically accumulated 3.39" (86mm) of snow. Throughout the year, there are 32.1 snowfall days, and 13.31" (338mm) of snow is accumulated.

Daylight

In January, the average length of the day is 10h and 1min.
On the first day of January, sunrise is at 7:40 am and sunset at 5:25 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 5:54 pm EST.

Sunshine

With an average of 5h of sunshine, January has the least sunshine of the year in Johnson City.

UV index

The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: In January, the average maximum UV index of 2 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the coldest month in Johnson City?

January is the coldest month in Johnson City, with an average high-temperature of 41.5°F (5.3°C) and an average low-temperature of 26.6°F (-3°C).

What is the average humidity in January in Johnson City?

In January, the average relative humidity in Johnson City is 78%.

How many days does it rain in January in Johnson City?

In Johnson City, during January, the rain falls for 13.8 days and regularly aggregates up to 2.6" (66mm) of precipitation.

How much does it snow in Johnson City in January?

In January, in Johnson City, Tennessee, it is snowing for 8.9 days. Throughout January, 3.39" (86mm) of snow is accumulated.

What is the average length of the day in January in Johnson City?

The average day length in January is 10h and 1min.

When are sunrise and sunset in January in Johnson City?

In January, on the first day of the month, sunrise is at 7:40 am and sunset at 5:25 pm. On the last day of the month, in Johnson City, Tennessee, sunrise is at 7:31 am and sunset at 5:54 pm EST.

What is the month with the least sunshine in Johnson City?

The month with the least sunshine in Johnson City, Tennessee, is January, with an average of 5h of sunshine.

How long on average sun shines in January in Johnson City?

In January, the average sunshine duration in Johnson City is 5h.

When is the lowest UV index in Johnson City?

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

How high is the UV index in January in Johnson City?

In January, the average daily maximum UV index in Johnson City, Tennessee, is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Johnson City, TN

Average temperature in January - Johnson City, TN
  • Average high temperature in January: 41.5°F

The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (41.5°F).

  • Average low temperature in January: 26.6°F

The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is January (26.6°F).

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Average pressure in January
Johnson City, TN

Average pressure in January - Johnson City, TN
  • Average pressure in January: 30.15"Hg

The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).

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Average wind speed in January
Johnson City, TN

Average wind speed in January - Johnson City, TN
  • Average wind speed in January: 6.4mph

The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).

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Average humidity in January
Johnson City, TN

Average humidity in January - Johnson City, TN
  • Average humidity in January: 78%

The months with the highest relative humidity are February and December (79%).
The month with the lowest relative humidity is November (75%).

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Average rainfall in January
Johnson City, TN

Average rainfall in January - Johnson City, TN
  • Average rainfall in January: 2.6"

The wettest month (with the highest rainfall) is February (3.27").
The driest month (with the least rainfall) is September (1.77").

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Average rainfall days in January
Johnson City, TN

Average rainfall days in January - Johnson City, TN
  • Average rainfall days in January: 13.8 days

The month with the highest number of rainy days is July (19.6 days).
The month with the least rainy days is November (11.2 days).

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Average snowfall in January
Johnson City, TN

Average snowfall in January - Johnson City, TN
  • Average snowfall in January: 3.39"

The month with the highest snowfall is December (3.74").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in January
Johnson City, TN

Average snowfall days in January - Johnson City, TN
  • Average snowfall days in January: 8.9 days

The month with the highest number of snowfall days is January (8.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in January /
Average sunshine in January
Johnson City, TN

Average daylight in January / Average sunshine in January - Johnson City, TN
  • Average daylight in January: 10h and 1min

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 44min).

  • Average sunshine in January: 5h and 0min

The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).

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Average sunshine days in January
Johnson City, TN

Average sunshine days in January - Johnson City, TN
  • Average sunshine days in January: 11.1 days

The month with the most sunshine days is October (16.5 days).
The month with the least sunshine days is July (8.3 days).

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Average UV index in January
Johnson City, TN

Average UV index in January - Johnson City, TN
  • Average UV index in January: 2

The months with the highest UV index are 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 cloud cover in January
Johnson City, TN

Average cloud cover in January - Johnson City, TN
  • Average cloud cover in January: 50

The month with the most cloud cover is February (Cloud cover 52).
The months with the least cloud cover are June and August (Cloud cover 31).

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Average visibility in January
Johnson City, TN

Average visibility in January - Johnson City, TN
  • Average visibility in January: 5mi

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

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