September Weather in Puerto San Jose, Guatemala

Last updated: August 23, 2025

In Puerto San Jose, Guatemala, the average temperature in September hovers around 27°C (80°F). With a minimum of 24°C (75°F) and a maximum of 30°C (86°F), the weather remains pleasantly warm. Expect a significant amount of rainfall, totaling 277 mm (10.9 in) over 27 days, and enjoy the humid atmosphere with an average humidity of 74%.

September Temperature in Puerto San Jose

In September in Puerto San Jose, the average temperature is 27°C (80°F). Maximums can reach 30°C (86°F), and minimums can be as low as 24°C (75°F). This mild and pleasant weather makes Puerto San Jose an ideal destination for travelers seeking warmth and sunshine during September.

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

The chart illustrates September temperature patterns in Puerto San Jose, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Puerto San Jose, September typically has an average temperature of 27°C (80°F), with highs reaching up to 30°C (86°F) and lows dropping to around 24°C (75°F).

Data source: Temperature data for Puerto San Jose generated using information from the Copernicus Climate Change Service.

September Precipitation in Puerto San Jose

In Puerto San Jose in September, the precipitation amount is 277 mm (10.9 in) spread over 27 days, indicating a frequent but varied pattern of rainfall throughout the month.

September Precipitation Trends in Puerto San Jose

The chart displays monthly precipitation patterns in Puerto San Jose, 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 Puerto San Jose, September typically receives around 277 mm (10.9 inches) of precipitation spread over approximately 27 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Puerto San Jose

In Puerto San Jose in September, humidity is 74%. With an average temperature of 27°C (80°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities sticky and uncomfortable for traveling.

September Average Humidity in Puerto San Jose

This chart illustrates the average monthly humidity levels in Puerto San Jose, 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 Puerto San Jose is approximately 74%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Puerto San Jose

In Puerto San Jose in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Puerto San Jose.

Maximum UV Index Levels in Puerto San Jose for September

The chart shows the monthly maximum UV Index (UVI) for Puerto San Jose 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 Puerto San Jose typically reaches 13, which falls under the extreme exposure category.

Data source: Puerto San Jose 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 Puerto San Jose Compares to Other Months

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

This table compares monthly weather conditions in Puerto San Jose, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	26°C (79°F)	6 mm (0.2 inches)	68%	very high
February Weather	26°C (80°F)	5 mm (0.2 inches)	68%	extreme
March Weather	27°C (81°F)	12 mm (0.5 inches)	66%	extreme
April Weather	27°C (82°F)	38 mm (1.5 inches)	68%	extreme
May Weather	27°C (81°F)	219 mm (8.6 inches)	68%	extreme
June Weather	27°C (81°F)	316 mm (12.5 inches)	72%	extreme
July Weather	27°C (81°F)	122 mm (4.8 inches)	78%	extreme
August Weather	27°C (81°F)	181 mm (7.1 inches)	78%	extreme
September Weather	27°C (80°F)	277 mm (10.9 inches)	74%	extreme
October Weather	26°C (80°F)	319 mm (12.6 inches)	73%	extreme
November Weather	27°C (80°F)	55 mm (2.2 inches)	75%	very high
December Weather	26°C (80°F)	10 mm (0.4 inches)	69%	very high