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January Weather in Johnston City, United States

Last updated: June 24, 2025

In Johnston City, United States, the average temperature in January hovers around 2°C (36°F). Temperature extremes can range from a chilling -17°C (1°F) to a surprisingly warm 21°C (71°F). Expect about 98 mm (3.9 in) of precipitation spread over 8 days, and prepare for a high humidity average of 86% that can make the atmosphere feel particularly moist.

January Temperature in Johnston City

In January in Johnston City, the average temperature is 2°C (36°F), with maximums reaching up to 21°C (71°F) and minimums dropping as low as -17°C (1°F). Visitors should be prepared for a wide range of temperatures and pack accordingly for both warm and cold conditions.

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

The chart illustrates January temperature patterns in Johnston City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Johnston City, January typically has an average temperature of 2°C (36°F), with highs reaching up to 21°C (71°F) and lows dropping to around -17°C (1°F).
JanFebMarAprMayJunJulAugSepOctNovDec363949576977807773614641
Data source: Temperature data for Johnston 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 Johnston City

In Johnston City in January, the total precipitation amount is 98 mm (3.9 in), occurring over 8 days.

January Precipitation Trends in Johnston City

The chart displays monthly precipitation patterns in Johnston 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 Johnston City, January typically receives around 98 mm (3.9 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec981181411421381089381741149488
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Johnston City

In Johnston City in January, humidity is 86%. With an average temperature of 2°C (36°F), this humidity feels like a biting chill that clings to your skin, making outdoor exploration uncomfortable and dampening any enthusiasm for travel.

January Average Humidity in Johnston City

This chart illustrates the average monthly humidity levels in Johnston 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 Johnston City is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%84%80%82%83%80%76%75%75%85%88%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Johnston City

In Johnston City in January, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Johnston City, you can check the information here.

Maximum UV Index Levels in Johnston City for January

The chart shows the monthly maximum UV Index (UVI) for Johnston 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 Johnston City typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35710111110109753
Data source: Johnston 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 Johnston City Compares to Other Months

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

This table compares monthly weather conditions in Johnston City, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)98 mm (3.9 inches)86%moderate
February Weather4°C (39°F)118 mm (4.7 inches)84%moderate
March Weather10°C (49°F)141 mm (5.6 inches)84%high
April Weather14°C (57°F)142 mm (5.6 inches)80%very high
May Weather20°C (69°F)138 mm (5.4 inches)82%extreme
June Weather25°C (77°F)108 mm (4.2 inches)83%extreme
July Weather27°C (81°F)92 mm (3.6 inches)79%very high
August Weather25°C (78°F)81 mm (3.2 inches)76%very high
September Weather23°C (74°F)74 mm (2.9 inches)75%very high
October Weather16°C (61°F)114 mm (4.5 inches)74%high
November Weather8°C (46°F)94 mm (3.7 inches)85%moderate
December Weather5°C (42°F)88 mm (3.4 inches)88%moderate

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