January Weather in San Sebastian, Puerto Rico

Last updated: August 31, 2025

In San Sebastian, Puerto Rico, the average temperature in January hovers around 24°C (76°F). Expect a comfortable range with minimums dipping to 17°C (63°F) and maximums reaching 30°C (86°F). During this period, precipitation totals approximately 22 mm (0.9 in) spread over 7 days, accompanied by an average humidity of 76%. Embrace the mild climate as you explore this beautiful location!

January Temperature in San Sebastian

In January in San Sebastian, the average temperature is 24°C (76°F). Maximums can reach 30°C (86°F) and minimums can be as low as 17°C (63°F). This pleasant climate makes it an ideal time for travelers to explore outdoor activities and enjoy the local attractions.

January Weather in San Sebastian: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in San Sebastian, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Sebastian, January typically has an average temperature of 24°C (76°F), with highs reaching up to 30°C (86°F) and lows dropping to around 17°C (63°F).

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

January Precipitation in San Sebastian

In San Sebastian in January, the precipitation amount is 22 mm (0.9 in) over the course of 7 days.

January Precipitation Trends in San Sebastian

The chart displays monthly precipitation patterns in San Sebastian, 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 San Sebastian, January typically receives around 22 mm (0.9 inches) of precipitation spread over approximately 7 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 San Sebastian

In San Sebastian in January, humidity is 76%. With an average temperature of 24°C (76°F), this humidity feels like a warm embrace that can quickly lead to discomfort for traveling, making long walks and outdoor activities feel exhausting and sticky.

January Average Humidity in San Sebastian

This chart illustrates the average monthly humidity levels in San Sebastian, 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 San Sebastian is approximately 76%, 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 San Sebastian

In San Sebastian in January, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in San Sebastian.

Maximum UV Index Levels in San Sebastian for January

The chart shows the monthly maximum UV Index (UVI) for San Sebastian 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 San Sebastian typically reaches 9, which falls under the very high exposure category.

Data source: San Sebastian 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 San Sebastian Compares to Other Months

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

This table compares monthly weather conditions in San Sebastian, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	24°C (76°F)	22 mm (0.9 inches)	76%	very high
February Weather	24°C (76°F)	33 mm (1.3 inches)	75%	extreme
March Weather	24°C (76°F)	68 mm (2.7 inches)	74%	extreme
April Weather	25°C (77°F)	72 mm (2.8 inches)	75%	extreme
May Weather	26°C (79°F)	95 mm (3.7 inches)	75%	extreme
June Weather	27°C (80°F)	85 mm (3.4 inches)	77%	extreme
July Weather	27°C (81°F)	103 mm (4.1 inches)	80%	extreme
August Weather	27°C (81°F)	106 mm (4.2 inches)	80%	extreme
September Weather	27°C (80°F)	192 mm (7.6 inches)	79%	extreme
October Weather	26°C (79°F)	122 mm (4.8 inches)	78%	extreme
November Weather	26°C (78°F)	98 mm (3.9 inches)	78%	very high
December Weather	25°C (77°F)	28 mm (1.1 inches)	76%	very high