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January Weather in Union City, United States

Last updated: June 24, 2025

In January, the average temperature in Union City, United States hovers around 4°C (39°F). However, be prepared for a temperature range that can drop as low as -18°C (0°F) or rise to a pleasant 22°C (72°F). During this month, expect about 105 mm (4.1 in) of precipitation over 8 days, and with an average humidity of 86%, it can feel quite damp.

January Temperature in Union City

In January in Union City, the average temperature is 4°C (39°F). Maximums can reach 22°C (72°F), while minimums can drop to as low as -18°C (0°F). Be prepared for a wide range of temperatures if you're planning to travel during this time.

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

The chart illustrates January temperature patterns in Union City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Union City, January typically has an average temperature of 4°C (39°F), with highs reaching up to 22°C (72°F) and lows dropping to around -18°C (0°F).
JanFebMarAprMayJunJulAugSepOctNovDec394352597178817875634844
Data source: Temperature data for Union 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 Union City

In Union City in January, the precipitation amount is 105 mm (4.1 in) over the course of 8 days.

January Precipitation Trends in Union City

The chart displays monthly precipitation patterns in Union 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 Union City, January typically receives around 105 mm (4.1 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec1051611731451241091149786113104117
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Union City

In Union City in January humidity is 86%. With an average temperature of 4°C (39°F), this humidity feels like a chilly mist enveloping you, making it essential to bundle up while exploring, as each breath comes with a damp chill that can be quite refreshing yet starkly invigorating for travelers.

January Average Humidity in Union City

This chart illustrates the average monthly humidity levels in Union 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 Union 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 Union City

In Union 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 Union City, you can check the information here.

Maximum UV Index Levels in Union City for January

The chart shows the monthly maximum UV Index (UVI) for Union 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 Union City typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710111111109753
Data source: Union 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 Union City Compares to Other Months

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

This table compares monthly weather conditions in Union City, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)105 mm (4.1 inches)86%moderate
February Weather6°C (43°F)161 mm (6.3 inches)84%high
March Weather11°C (52°F)173 mm (6.8 inches)84%high
April Weather15°C (59°F)145 mm (5.7 inches)80%very high
May Weather21°C (71°F)124 mm (4.9 inches)82%extreme
June Weather25°C (78°F)109 mm (4.3 inches)83%extreme
July Weather27°C (81°F)113 mm (4.5 inches)79%extreme
August Weather26°C (79°F)97 mm (3.8 inches)76%very high
September Weather24°C (75°F)86 mm (3.4 inches)75%very high
October Weather17°C (63°F)113 mm (4.4 inches)74%high
November Weather9°C (48°F)104 mm (4.1 inches)85%moderate
December Weather7°C (45°F)117 mm (4.6 inches)88%moderate

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