January Weather in Cudjoe Key, United States

Last updated: June 24, 2025

In Cudjoe Key, United States, the average temperature in January is a pleasant 21°C (71°F). You'll experience a comfortable range, with minimums dipping to 11°C (53°F) and maximums reaching 26°C (79°F). Expect 24 mm (0.9 in) of precipitation spread over 4 days, with humidity levels averaging at a balmy 81%. Perfect weather for your next adventure!

January Temperature in Cudjoe Key

In January in Cudjoe Key, the average temperature is 21°C (71°F), with maximums reaching up to 26°C (79°F) and minimums dropping as low as 11°C (53°F). This pleasant climate makes Cudjoe Key an ideal destination for travelers looking to enjoy moderate temperatures and outdoor activities.

January Weather in Cudjoe Key: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Cudjoe Key, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cudjoe Key, January typically has an average temperature of 21°C (71°F), with highs reaching up to 26°C (79°F) and lows dropping to around 11°C (53°F).

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

January Precipitation in Cudjoe Key

In Cudjoe Key in January, the precipitation amount is 24 mm (0.9 in) over a period of 4 days.

January Precipitation Trends in Cudjoe Key

The chart displays monthly precipitation patterns in Cudjoe Key, 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 Cudjoe Key, January typically receives around 24 mm (0.9 inches) of precipitation spread over approximately 4 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 Cudjoe Key

In Cudjoe Key in January, humidity is 81%. With an average temperature of 21°C (71°F), this humidity feels like a warm, enveloping blanket that makes traveling feel both refreshing and slightly heavy, often leading to a sticky sensation that can quickly deplete your energy.

January Average Humidity in Cudjoe Key

This chart illustrates the average monthly humidity levels in Cudjoe Key, 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 Cudjoe Key is approximately 81%, 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 Cudjoe Key

In Cudjoe Key in January, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Cudjoe Key, you can refer to this Hourly UV Index in Cudjoe Key.

Maximum UV Index Levels in Cudjoe Key for January

The chart shows the monthly maximum UV Index (UVI) for Cudjoe Key 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 Cudjoe Key typically reaches 6, which falls under the high exposure category.

Data source: Cudjoe Key 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 Cudjoe Key Compares to Other Months

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

This table compares monthly weather conditions in Cudjoe Key, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	21°C (71°F)	24 mm (0.9 inches)	81%	high
February Weather	23°C (73°F)	25 mm (1.0 inches)	79%	very high
March Weather	23°C (74°F)	15 mm (0.6 inches)	76%	extreme
April Weather	25°C (77°F)	42 mm (1.7 inches)	73%	extreme
May Weather	26°C (79°F)	136 mm (5.4 inches)	71%	extreme
June Weather	28°C (82°F)	105 mm (4.1 inches)	69%	extreme
July Weather	28°C (83°F)	109 mm (4.3 inches)	70%	extreme
August Weather	29°C (84°F)	111 mm (4.4 inches)	72%	extreme
September Weather	28°C (83°F)	189 mm (7.4 inches)	76%	extreme
October Weather	27°C (81°F)	131 mm (5.2 inches)	79%	very high
November Weather	25°C (77°F)	70 mm (2.7 inches)	80%	very high
December Weather	23°C (73°F)	36 mm (1.4 inches)	81%	high