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September Weather in San Lorenzo, Guatemala

Last updated: August 23, 2025

In San Lorenzo, Guatemala during September, the temperature averages around 16°C (61°F). Expect lows of 10°C (49°F) and highs reaching up to 23°C (74°F). The region experiences an average of 417 mm (16.4 in) of precipitation over 29 days, creating a notably humid atmosphere with an average humidity of 82%.

September Temperature in San Lorenzo

In September, in San Lorenzo, the average temperature is 16°C (61°F). The maximum can reach 23°C (74°F), and the minimum can be as low as 10°C (49°F). This mild climate makes San Lorenzo an ideal destination for travelers seeking comfortable weather.

September Weather in San Lorenzo: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in San Lorenzo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Lorenzo, September typically has an average temperature of 16°C (61°F), with highs reaching up to 23°C (74°F) and lows dropping to around 10°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec585960616262616161616058
Data source: Temperature data for San Lorenzo 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 San Lorenzo

In San Lorenzo in September, the total precipitation amount is 417 mm (16.4 in) spread over 29 days.

September Precipitation Trends in San Lorenzo

The chart displays monthly precipitation patterns in San Lorenzo, 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 San Lorenzo, September typically receives around 417 mm (16.4 inches) of precipitation spread over approximately 29 days.
JanFebMarAprMayJunJulAugSepOctNovDec3129571243814532203594173268538
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Lorenzo

In San Lorenzo in September humidity is 82%. With an average temperature of 16°C (61°F), this humidity feels like a heavy blanket enveloping you, making travel feel a bit sluggish and requiring frequent breaks to hydrate and cool down.

September Average Humidity in San Lorenzo

This chart illustrates the average monthly humidity levels in San Lorenzo, 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 San Lorenzo 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 San Lorenzo

In San Lorenzo 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 San Lorenzo, you can check here.

Maximum UV Index Levels in San Lorenzo for September

The chart shows the monthly maximum UV Index (UVI) for San Lorenzo 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 San Lorenzo typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec121416161515161514141110
Data source: San Lorenzo 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 San Lorenzo Compares to Other Months

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

This table compares monthly weather conditions in San Lorenzo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather14°C (58°F)31 mm (1.2 inches)76%extreme
February Weather15°C (59°F)29 mm (1.1 inches)68%extreme
March Weather16°C (61°F)57 mm (2.2 inches)59%extreme
April Weather16°C (62°F)124 mm (4.9 inches)57%extreme
May Weather17°C (63°F)381 mm (15.0 inches)65%extreme
June Weather16°C (62°F)453 mm (17.8 inches)66%extreme
July Weather16°C (62°F)220 mm (8.7 inches)75%extreme
August Weather16°C (62°F)358 mm (14.1 inches)82%extreme
September Weather16°C (61°F)417 mm (16.4 inches)82%extreme
October Weather16°C (61°F)326 mm (12.8 inches)83%extreme
November Weather16°C (60°F)85 mm (3.4 inches)80%extreme
December Weather15°C (59°F)38 mm (1.5 inches)76%very high

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