January Weather in Johnson City, United States

Last updated: June 24, 2025

In January, the average temperature in Johnson City, United States hovers around 5°C (41°F), making it a chilly time of year. Expect minimum temperatures to dip as low as -13°C (10°F) and occasionally reach a comfortable 15°C (59°F). This month also brings 203 mm (8.0 in) of precipitation spread over 17 days, resulting in a high average humidity of 85%. Be prepared for damp and cool conditions!

January Temperature in Johnson City

In January in Johnson City, the average temperature is 5°C (41°F). The maximum can reach 15°C (59°F), while the minimum can drop as low as -13°C (10°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

January Weather in Johnson City: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Johnson City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Johnson City, January typically has an average temperature of 5°C (41°F), with highs reaching up to 15°C (59°F) and lows dropping to around -13°C (10°F).

Data source: Temperature data for Johnson City generated using information from the Copernicus Climate Change Service.

January Precipitation in Johnson City

In Johnson City in January, the total precipitation amount is 203 mm (8.0 in) spread out over 17 days.

January Precipitation Trends in Johnson City

The chart displays monthly precipitation patterns in Johnson City, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Johnson City, January typically receives around 203 mm (8.0 inches) of precipitation spread over approximately 17 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

January Humidity in Johnson City

In Johnson City in January, humidity is 85%. With an average temperature of 5°C (41°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration a challenge as the cold air clings to your skin.

January Average Humidity in Johnson City

This chart illustrates the average monthly humidity levels in Johnson City, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Johnson City is approximately 85%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Johnson City

In Johnson City in January, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Johnson City, you can visit Hourly UV Index in Johnson City.

Maximum UV Index Levels in Johnson City for January

The chart shows the monthly maximum UV Index (UVI) for Johnson City in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Johnson City typically reaches 2, which falls under the low exposure category.

Data source: Johnson City January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How January Weather in Johnson City Compares to Other Months

Weather in Johnson City varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Johnson City, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Johnson City, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (41°F)	203 mm (8.0 inches)	85%	low
February Weather	5°C (41°F)	227 mm (9.0 inches)	84%	moderate
March Weather	8°C (46°F)	161 mm (6.3 inches)	85%	moderate
April Weather	11°C (51°F)	142 mm (5.6 inches)	83%	high
May Weather	14°C (58°F)	71 mm (2.8 inches)	83%	very high
June Weather	18°C (64°F)	59 mm (2.3 inches)	83%	very high
July Weather	21°C (69°F)	7 mm (0.3 inches)	82%	very high
August Weather	21°C (70°F)	10 mm (0.4 inches)	74%	very high
September Weather	18°C (64°F)	83 mm (3.3 inches)	71%	high
October Weather	11°C (53°F)	155 mm (6.1 inches)	81%	moderate
November Weather	8°C (46°F)	207 mm (8.1 inches)	87%	moderate
December Weather	5°C (41°F)	233 mm (9.2 inches)	87%	low