September Weather in Los Fresnos, Mexico

Last updated: August 27, 2025

In September, the average temperature in Los Fresnos, Mexico is a pleasant 19°C (67°F), offering a perfect backdrop for your adventures. Expect a minimum of 11°C (52°F) and a delightful maximum of 29°C (84°F). However, be prepared for some rain, as the region sees an average precipitation of 183 mm (7.2 in) over 21 days, alongside a humidity level of 81%. Whether you're exploring or relaxing, pack accordingly!

September Temperature in Los Fresnos

In September in Los Fresnos, the average temperature is 19°C (67°F). Maximums can reach 29°C (84°F) and minimums can be as low as 11°C (52°F). This pleasant climate makes Los Fresnos an ideal destination for travelers seeking mild weather and comfortable conditions.

September Weather in Los Fresnos: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Los Fresnos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Los Fresnos, September typically has an average temperature of 19°C (67°F), with highs reaching up to 29°C (84°F) and lows dropping to around 11°C (52°F).

Data source: Temperature data for Los Fresnos generated using information from the Copernicus Climate Change Service.

September Precipitation in Los Fresnos

In Los Fresnos in September, the total precipitation amount is 183 mm (7.2 in) spread over 21 days.

September Precipitation Trends in Los Fresnos

The chart displays monthly precipitation patterns in Los Fresnos, 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 Los Fresnos, September typically receives around 183 mm (7.2 inches) of precipitation spread over approximately 21 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 Los Fresnos

In Los Fresnos in September humidity is 81%. With an average temperature of 19°C (67°F), this humidity feels like a heavy blanket enveloping you, making travel somewhat uncomfortable as sweat clings to your skin and the air feels thick, prompting you to seek shade and hydration frequently.

September Average Humidity in Los Fresnos

This chart illustrates the average monthly humidity levels in Los Fresnos, 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 Los Fresnos is approximately 81%, 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 Los Fresnos

In Los Fresnos 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 Los Fresnos, you can check here.

Maximum UV Index Levels in Los Fresnos for September

The chart shows the monthly maximum UV Index (UVI) for Los Fresnos 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 Los Fresnos typically reaches 14, which falls under the extreme exposure category.

Data source: Los Fresnos 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 Los Fresnos Compares to Other Months

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

This table compares monthly weather conditions in Los Fresnos, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	15°C (60°F)	6 mm (0.2 inches)	74%	very high
February Weather	17°C (64°F)	7 mm (0.3 inches)	65%	extreme
March Weather	20°C (69°F)	7 mm (0.3 inches)	58%	extreme
April Weather	22°C (72°F)	3 mm (0.1 inches)	58%	extreme
May Weather	23°C (74°F)	44 mm (1.7 inches)	67%	extreme
June Weather	21°C (71°F)	165 mm (6.5 inches)	76%	extreme
July Weather	19°C (67°F)	234 mm (9.2 inches)	67%	extreme
August Weather	20°C (67°F)	188 mm (7.4 inches)	68%	extreme
September Weather	19°C (67°F)	183 mm (7.2 inches)	81%	extreme
October Weather	19°C (66°F)	67 mm (2.6 inches)	83%	extreme
November Weather	17°C (63°F)	20 mm (0.8 inches)	84%	very high
December Weather	15°C (59°F)	4 mm (0.2 inches)	81%	very high