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May Weather in San Sebastian, Mexico

Last updated: August 27, 2025

In May, the average temperature in San Sebastian, Mexico hovers around 23°C (74°F). Expect a comfortable range where the minimum can dip to 12°C (54°F) and the maximum peaks at 33°C (91°F). With an average precipitation of 83 mm (3.3 in) spread over about 10 days, and an average humidity of 67%, be prepared for a blend of warm and refreshing weather!

May Temperature in San Sebastian

In May in San Sebastian, the average temperature is 23°C (74°F). Maximums can reach 33°C (91°F) and minimums can be as low as 12°C (54°F). This climate makes San Sebastian an ideal destination for travelers looking to enjoy warm days and cool evenings.

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

The chart illustrates May 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, May typically has an average temperature of 23°C (74°F), with highs reaching up to 33°C (91°F) and lows dropping to around 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec636670727370696868686563
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.

May Precipitation in San Sebastian

In San Sebastian in May, the total precipitation amount is 83 mm (3.3 in) over a span of 10 days.

May Precipitation Trends in San Sebastian

The chart displays monthly precipitation patterns in San Sebastian, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In San Sebastian, May typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec131312383384480557502266668
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in San Sebastian

In San Sebastian in May humidity is 67%. With an average temperature of 23°C (74°F), this humidity feels like a warm embrace, making outdoor exploration pleasant yet slightly sticky, perfect for leisurely strolls but requiring occasional breaks for hydration.

May Average Humidity in San Sebastian

This chart illustrates the average monthly humidity levels in San Sebastian, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in San Sebastian is approximately 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec70%65%59%60%67%80%81%83%83%80%77%76%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in San Sebastian

In San Sebastian in May, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in San Sebastian, you can check here.

Maximum UV Index Levels in San Sebastian for May

The chart shows the monthly maximum UV Index (UVI) for San Sebastian in May, 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 May, the maximum UV index in San Sebastian typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911141414141313141198
Data source: San Sebastian May 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 May 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 May’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 May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather17°C (63°F)13 mm (0.5 inches)70%very high
February Weather19°C (66°F)13 mm (0.5 inches)65%extreme
March Weather21°C (70°F)12 mm (0.5 inches)59%extreme
April Weather22°C (72°F)3 mm (0.1 inches)60%extreme
May Weather23°C (74°F)83 mm (3.3 inches)67%extreme
June Weather21°C (70°F)383 mm (15.1 inches)80%extreme
July Weather20°C (69°F)480 mm (18.9 inches)81%extreme
August Weather20°C (69°F)557 mm (21.9 inches)83%extreme
September Weather20°C (68°F)502 mm (19.8 inches)83%extreme
October Weather20°C (68°F)266 mm (10.5 inches)80%extreme
November Weather18°C (66°F)66 mm (2.6 inches)77%very high
December Weather17°C (63°F)7 mm (0.3 inches)76%very high

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