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January Weather in Johnson City, United States

Last updated: June 24, 2025

In January, the average temperature in Johnson City, United States hovers around 10°C (50°F). However, be prepared for a range, as temperatures can dip to a chilly -9°C (16°F) or soar to a warm 26°C (79°F). Expect about 46 mm (1.8 in) of precipitation spread over 6 days, contributing to an average humidity level of 78%.

January Temperature in Johnson City

In January in Johnson City, the average temperature is 10°C (50°F). Maximums can reach 26°C (79°F), while minimums can drop as low as -9°C (16°F). Be prepared for a wide range of temperatures during your travels, 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 10°C (50°F), with highs reaching up to 26°C (79°F) and lows dropping to around -9°C (16°F).
JanFebMarAprMayJunJulAugSepOctNovDec505262677581848478695954
Data source: Temperature data for Johnson City generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in Johnson City

In Johnson City in January, the precipitation amount is 46 mm (1.8 in) over a span of 6 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 46 mm (1.8 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec4662657114073578199953346
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Johnson City

In Johnson City in January humidity is 78%. With an average temperature of 10°C (50°F), this humidity feels like a chilly dampness that can seep into your clothes, making outdoor activities less enjoyable and requiring extra layers to stay warm as you explore the area.

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 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%78%77%78%82%78%69%63%66%73%84%87%
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 reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the 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 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579111112121111965
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.
 TemperaturePrecipitationHumidityUV
January Weather10°C (50°F)46 mm (1.8 inches)78%moderate
February Weather11°C (52°F)62 mm (2.4 inches)78%high
March Weather17°C (62°F)65 mm (2.6 inches)77%very high
April Weather20°C (67°F)71 mm (2.8 inches)78%extreme
May Weather24°C (75°F)140 mm (5.5 inches)82%extreme
June Weather27°C (81°F)73 mm (2.9 inches)78%extreme
July Weather29°C (84°F)57 mm (2.2 inches)69%extreme
August Weather29°C (84°F)81 mm (3.2 inches)63%extreme
September Weather26°C (78°F)99 mm (3.9 inches)66%extreme
October Weather20°C (69°F)95 mm (3.7 inches)73%very high
November Weather15°C (59°F)33 mm (1.3 inches)84%high
December Weather12°C (54°F)46 mm (1.8 inches)87%moderate

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