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January Weather in Jacksonville, United States

Last updated: June 24, 2025

In January, the average temperature in Jacksonville, United States hovers around -2°C (29°F). While the mercury can dip as low as -26°C (-14°F), it can occasionally rise to a pleasant 17°C (63°F). These chilly days are accompanied by an average precipitation of 67 mm (2.6 in) spread over 7 days, and a high humidity level of 82%. Stay prepared for the brisk weather!

January Temperature in Jacksonville

In January in Jacksonville, the average temperature is -2°C (29°F). Maximum can reach 17°C (63°F), and the minimum can be as low as -26°C (-14°F). Travelers should be prepared for a wide range of temperatures, from chilly days to surprisingly warmer spells.

January Weather in Jacksonville: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Jacksonville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jacksonville, January typically has an average temperature of -2°C (29°F), with highs reaching up to 17°C (63°F) and lows dropping to around -26°C (-14°F).
JanFebMarAprMayJunJulAugSepOctNovDec293244536675787571574236
Data source: Temperature data for Jacksonville 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 Jacksonville

In Jacksonville in January, the total precipitation amount is 67 mm (2.6 in) over a span of 7 days.

January Precipitation Trends in Jacksonville

The chart displays monthly precipitation patterns in Jacksonville, 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 Jacksonville, January typically receives around 67 mm (2.6 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec676413712315012310391641026648
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Jacksonville

In Jacksonville in January, humidity is 82%. With an average temperature of -2°C (29°F), this humidity feels like a frigid chill that seeps into your bones, making travel quite uncomfortable and forcing you to bundle up tightly to ward off the damp cold that lingers in the air.

January Average Humidity in Jacksonville

This chart illustrates the average monthly humidity levels in Jacksonville, 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 Jacksonville is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%80%82%83%81%80%76%76%85%86%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Jacksonville

In Jacksonville 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 Jacksonville, you can check the information here.

Maximum UV Index Levels in Jacksonville for January

The chart shows the monthly maximum UV Index (UVI) for Jacksonville 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 Jacksonville typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910111199643
Data source: Jacksonville 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 Jacksonville Compares to Other Months

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

This table compares monthly weather conditions in Jacksonville, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)67 mm (2.6 inches)82%moderate
February Weather0°C (32°F)64 mm (2.5 inches)80%moderate
March Weather7°C (44°F)137 mm (5.4 inches)80%high
April Weather11°C (53°F)123 mm (4.8 inches)80%very high
May Weather19°C (66°F)150 mm (5.9 inches)82%very high
June Weather24°C (75°F)123 mm (4.9 inches)83%extreme
July Weather25°C (78°F)103 mm (4.0 inches)81%extreme
August Weather24°C (75°F)91 mm (3.6 inches)80%very high
September Weather22°C (71°F)64 mm (2.5 inches)76%very high
October Weather14°C (57°F)102 mm (4.0 inches)76%high
November Weather6°C (42°F)66 mm (2.6 inches)85%moderate
December Weather2°C (37°F)48 mm (1.9 inches)86%moderate

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