Johnson City
Tennessee, USA
Long-term weather forecast
Long-term weather forecast

January weather forecast and climate
Johnson City, TN

The front entrance to the Public Library in Johnson City, Tennessee, with flags flying on either side of the main entrance
The front entrance to the Public Library in Johnson City, Tennessee, with flags flying on either side of the main entrance
January, the same as December, is another cold winter month in Johnson City, Tennessee, with average temperature fluctuating between 41.5°F (5.3°C) and 26.6°F (-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

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

Rainfall

In Johnson City, in January, during 13.8 rainfall days, 2.6" (66mm) of precipitation is typically accumulated. In Johnson City, during the entire year, the rain falls for 187.8 days and collects up to 32.76" (832mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall in Johnson City, Tennessee. In Johnson City, 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 Johnson City, the average length of the day in January is 10h.

Sunshine

January has the least sunshine of the year, with an average of 5h of sunshine.

UV index

Months with the lowest UV index in Johnson City are January, February and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from unsafe exposure to the UV radiation for average individuals.
Note: The average daily UV index of 2 transform into the following instructions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the coldest month in Johnson City?

The coldest month is January, 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 temperature in January in Johnson City?

The average high-temperature, in January, is 41.5°F (5.3°C), while the average low-temperature is 26.6°F (-3°C).

What is the average humidity in January in Johnson City?

The average relative humidity in January in Johnson City is 78%.

How much does it rain in Johnson City in January?

In January, the rain falls for 13.8 days. Throughout January, 2.6" (66mm) of precipitation is accumulated.

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

In Johnson City, Tennessee, in January, during 8.9 snowfall days, 3.39" (86mm) of snow is typically accumulated.

How many hours of daylight does Johnson City have in January?

In January, the average length of the day in Johnson City, Tennessee, is 10h.

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

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

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

The average sunshine in January in Johnson City, Tennessee, is 5h.

What is the month with the lowest UV index in Johnson City?

Months with the lowest UV index in Johnson City 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 is 2. A UV Index estimate of 2, and below, represents a low health threat from the exposure to the Sun's UV rays.
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).

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

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

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 lowest rainfall) is September (1.77").

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 lowest number of rainy days is November (11.2 days).

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

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

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).
Months with the lowest number of snowfall days are June, July, August and September (0 days).

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

The month with the longest days is June (Average daylight: 14.6h).
The month with shortest days is December (Average daylight: 9.7h).

  • Average sunshine in January: 5h

The month with most sunshine is June (Average sunshine: 10.6h).
The month with least sunshine is January (Average sunshine: 5h).

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

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