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January Weather in San Sebastian, Guatemala

Last updated: August 23, 2025

In January, the average temperature in San Sebastian, Guatemala is a warm 26°C (79°F), with a minimum of 18°C (65°F) and a maximum of 34°C (93°F). Expect 24 mm (1.0 in) of precipitation spread over 6 days, contributing to an average humidity level of 76%. Make sure to pack accordingly for this pleasant, yet humid, climate!

January Temperature in San Sebastian

In January in San Sebastian, the average temperature is 26°C (79°F). The maximum can reach 34°C (93°F), while the minimum can be as low as 18°C (65°F). This pleasant weather makes it an ideal time for traveling to San Sebastian.

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 26°C (79°F), with highs reaching up to 34°C (93°F) and lows dropping to around 18°C (65°F).
JanFebMarAprMayJunJulAugSepOctNovDec798082828180818079798079
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 24 mm (1.0 in) spread over a period of 6 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 24 mm (1.0 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec24184410544737329236241837810626
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 76%. With an average temperature of 26°C (79°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities challenging and requiring frequent breaks to hydrate and cool down during your travels.

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.
JanFebMarAprMayJunJulAugSepOctNovDec76%68%59%57%65%66%75%82%82%83%80%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 reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more 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 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec1011131413131312131299
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 Weather26°C (79°F)24 mm (1.0 inches)76%very high
February Weather27°C (81°F)18 mm (0.7 inches)68%extreme
March Weather28°C (82°F)44 mm (1.7 inches)59%extreme
April Weather28°C (83°F)105 mm (4.1 inches)57%extreme
May Weather27°C (81°F)447 mm (17.6 inches)65%extreme
June Weather27°C (80°F)373 mm (14.7 inches)66%extreme
July Weather27°C (81°F)292 mm (11.5 inches)75%extreme
August Weather27°C (80°F)362 mm (14.3 inches)82%extreme
September Weather26°C (80°F)418 mm (16.5 inches)82%extreme
October Weather26°C (79°F)378 mm (14.9 inches)83%extreme
November Weather27°C (80°F)106 mm (4.2 inches)80%very high
December Weather26°C (80°F)26 mm (1.0 inches)76%very high

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