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January Weather in San Sebastian, Mexico

Last updated: August 27, 2025

In January, the average temperature in San Sebastian, Mexico is a pleasant 17°C (63°F), with a minimum dipping to around 5°C (41°F) and a maximum reaching up to 28°C (83°F). Expect a moderate amount of precipitation, averaging 13 mm (0.5 in) over 2 days, while the humidity lingers around a comfortable 70%.

January Temperature in San Sebastian

In January in San Sebastian, the average temperature is 17°C (63°F), with maximums reaching 28°C (83°F) and minimums dropping as low as 5°C (41°F). This mild weather makes it an ideal time for outdoor activities and exploration.

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 17°C (63°F), with highs reaching up to 28°C (83°F) and lows dropping to around 5°C (41°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.

January Precipitation in San Sebastian

In San Sebastian in January, the precipitation amount is 13 mm (0.5 in) over a span of 2 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 13 mm (0.5 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec131312383384480557502266668
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in San Sebastian

In San Sebastian in January humidity is 70%. With an average temperature of 17°C (63°F), this humidity feels like a warm embrace, making travel both refreshing and slightly sticky, as you navigate the air thick with moisture.

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 70%, 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 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.
JanFebMarAprMayJunJulAugSepOctNovDec911141414141313141198
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.
 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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