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April Weather in San Sebastian, Puerto Rico

Last updated: August 31, 2025

In April, the average temperature in San Sebastian, Puerto Rico is a pleasant 25°C (77°F), with daily highs reaching up to 30°C (86°F) and lows dipping to 20°C (68°F). During this time, expect 72 mm (2.8 in) of precipitation over approximately 17 days, contributing to an average humidity of 75%. Perfect for those who enjoy a warm and slightly humid climate!

April Temperature in San Sebastian

In April in San Sebastian, the average temperature is 25°C (77°F). The maximum can reach 30°C (86°F), and the minimum can be as low as 20°C (68°F). This mild weather makes it an ideal time for outdoor activities and exploring the local attractions.

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

The chart illustrates April 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, April typically has an average temperature of 25°C (77°F), with highs reaching up to 30°C (86°F) and lows dropping to around 20°C (68°F).
JanFebMarAprMayJunJulAugSepOctNovDec767675777880818180797877
Data source: Temperature data for San Sebastian 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.

April Precipitation in San Sebastian

In San Sebastian in April, the precipitation amount is 72 mm (2.8 in) spread over 17 days.

April Precipitation Trends in San Sebastian

The chart displays monthly precipitation patterns in San Sebastian, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In San Sebastian, April typically receives around 72 mm (2.8 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec2233687295851031061921229828
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in San Sebastian

In San Sebastian in April humidity is 75%. With an average temperature of 25°C (77°F), this humidity feels like a warm blanket, enveloping you and making travel somewhat taxing, as every step can feel heavier and the air thicker, often leading to a desire for shade and cool breezes.

April Average Humidity in San Sebastian

This chart illustrates the average monthly humidity levels in San Sebastian, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in San Sebastian is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%75%74%75%75%77%80%80%79%78%78%76%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in San Sebastian

In San Sebastian in April, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in San Sebastian.

Maximum UV Index Levels in San Sebastian for April

The chart shows the monthly maximum UV Index (UVI) for San Sebastian in April, 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 April, the maximum UV index in San Sebastian typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911131314131313131298
Data source: San Sebastian April 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 April 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 April’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 April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (76°F)22 mm (0.9 inches)76%very high
February Weather24°C (76°F)33 mm (1.3 inches)75%extreme
March Weather24°C (76°F)68 mm (2.7 inches)74%extreme
April Weather25°C (77°F)72 mm (2.8 inches)75%extreme
May Weather26°C (79°F)95 mm (3.7 inches)75%extreme
June Weather27°C (80°F)85 mm (3.4 inches)77%extreme
July Weather27°C (81°F)103 mm (4.1 inches)80%extreme
August Weather27°C (81°F)106 mm (4.2 inches)80%extreme
September Weather27°C (80°F)192 mm (7.6 inches)79%extreme
October Weather26°C (79°F)122 mm (4.8 inches)78%extreme
November Weather26°C (78°F)98 mm (3.9 inches)78%very high
December Weather25°C (77°F)28 mm (1.1 inches)76%very high

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