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September Weather in Barillas, Guatemala

Last updated: August 23, 2025

In Barillas, Guatemala, the average temperature in September hovers around 19°C (67°F). Expect a minimum of 12°C (55°F) and a maximum of 26°C (79°F). Be prepared for 278 mm (10.9 in) of precipitation spread over 25 days, resulting in a high average humidity of 82%.

September Temperature in Barillas

In September in Barillas, the average temperature is 19°C (67°F). The maximum can reach 26°C (79°F), and the minimum can be as low as 12°C (55°F). This mild climate makes it an ideal time for traveling and exploring all that Barillas has to offer.

September Weather in Barillas: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Barillas, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Barillas, September typically has an average temperature of 19°C (67°F), with highs reaching up to 26°C (79°F) and lows dropping to around 12°C (55°F).
JanFebMarAprMayJunJulAugSepOctNovDec606263666867666767666361
Data source: Temperature data for Barillas 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.

September Precipitation in Barillas

In Barillas in September, the total precipitation amount is 278 mm (10.9 in) spread over 25 days.

September Precipitation Trends in Barillas

The chart displays monthly precipitation patterns in Barillas, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Barillas, September typically receives around 278 mm (10.9 inches) of precipitation spread over approximately 25 days.
JanFebMarAprMayJunJulAugSepOctNovDec10157449822857912722227830016889
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Barillas

In Barillas in September humidity is 82%. With an average temperature of 19°C (67°F), this humidity feels like a heavy blanket wrapping around you, making each step feel sluggish and the air thick as you explore the sights.

September Average Humidity in Barillas

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

September UV Index in Barillas

In Barillas in September, 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 Barillas, you can check here.

Maximum UV Index Levels in Barillas for September

The chart shows the monthly maximum UV Index (UVI) for Barillas in September, 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 September, the maximum UV index in Barillas typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec111315151515151414131110
Data source: Barillas September 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 September Weather in Barillas Compares to Other Months

Weather in Barillas varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Barillas, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Barillas, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather16°C (60°F)101 mm (4.0 inches)76%extreme
February Weather17°C (62°F)57 mm (2.3 inches)68%extreme
March Weather17°C (63°F)44 mm (1.7 inches)59%extreme
April Weather19°C (67°F)98 mm (3.9 inches)57%extreme
May Weather20°C (69°F)228 mm (9.0 inches)65%extreme
June Weather20°C (68°F)579 mm (22.8 inches)66%extreme
July Weather19°C (67°F)127 mm (5.0 inches)75%extreme
August Weather19°C (67°F)222 mm (8.7 inches)82%extreme
September Weather19°C (67°F)278 mm (10.9 inches)82%extreme
October Weather19°C (67°F)300 mm (11.8 inches)83%extreme
November Weather17°C (63°F)168 mm (6.6 inches)80%extreme
December Weather16°C (61°F)89 mm (3.5 inches)76%very high

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