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August Weather in San Sebastian, Guatemala

Last updated: August 23, 2025

In August, the average temperature in San Sebastian, Guatemala is a warm 27°C (80°F), with minimums dipping to 22°C (72°F) and maximums soaring to 33°C (92°F). Expect a rather wet month, with 362 mm (14.3 in) of precipitation spread over 29 days. The air will feel quite humid, with an average humidity level of 82%.

August Temperature in San Sebastian

In August in San Sebastian, the average temperature is 27°C (80°F). Maximums can reach 33°C (92°F), and minimums can be as low as 22°C (72°F). This pleasant climate makes San Sebastian an ideal destination for travelers seeking warm and comfortable weather.

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

The chart illustrates August 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, August typically has an average temperature of 27°C (80°F), with highs reaching up to 33°C (92°F) and lows dropping to around 22°C (72°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.

August Precipitation in San Sebastian

In San Sebastian in August, the precipitation amount is 362 mm (14.3 in) over the course of 29 days.

August Precipitation Trends in San Sebastian

The chart displays monthly precipitation patterns in San Sebastian, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In San Sebastian, August typically receives around 362 mm (14.3 inches) of precipitation spread over approximately 29 days.
JanFebMarAprMayJunJulAugSepOctNovDec24184410544737329236241837810626
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in San Sebastian

In San Sebastian in August, humidity is 82%. With an average temperature of 27°C (80°F), this humidity feels like a warm blanket enveloping you, making outdoor activities feel sticky and heavy, often leaving travelers longing for shade and a refreshing drink.

August Average Humidity in San Sebastian

This chart illustrates the average monthly humidity levels in San Sebastian, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in San Sebastian is approximately 82%, 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 August generated using information from the Copernicus Climate Change Service.

August UV Index in San Sebastian

In San Sebastian in August, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in San Sebastian.

Maximum UV Index Levels in San Sebastian for August

The chart shows the monthly maximum UV Index (UVI) for San Sebastian in August, 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 August, the maximum UV index in San Sebastian typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec1011131413131312131299
Data source: San Sebastian August 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 August 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 August’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 August’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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