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September Weather in Los Fresnos, Mexico

Last updated: August 27, 2025

In September, the average temperature in Los Fresnos, Mexico is a warm 27°C (81°F), with a range that can dip to a cozy 21°C (71°F) and peak at a sizzling 36°C (97°F). Expect a precipitation total of 245 mm (9.6 in) over approximately 24 days, contributing to a high average humidity of 84%. Perfect for those who enjoy a tropical climate!

September Temperature in Los Fresnos

In September in Los Fresnos, the average temperature is 27°C (81°F). The maximum can reach 36°C (97°F), and the minimum can be as low as 21°C (71°F). This warm weather makes Los Fresnos an ideal destination for travelers seeking sunshine and pleasant outdoor activities.

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 27°C (81°F), with highs reaching up to 36°C (97°F) and lows dropping to around 21°C (71°F).
JanFebMarAprMayJunJulAugSepOctNovDec727478828582818181797472
Data source: Temperature data for Los Fresnos 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 Los Fresnos

In Los Fresnos in September, the precipitation amount is 245 mm (9.6 in) spread over 24 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 245 mm (9.6 inches) of precipitation spread over approximately 24 days.
JanFebMarAprMayJunJulAugSepOctNovDec46423228613122343242452559342
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Los Fresnos

In Los Fresnos in September humidity is 84%. With an average temperature of 27°C (81°F), this humidity feels like walking through a warm, moist blanket, making travel uncomfortable and sticky, as every step seems to weigh you down with the heavy air.

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 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%80%73%67%72%73%76%80%84%89%88%88%
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 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 Los Fresnos.

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 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911121313131413131198
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.
 TemperaturePrecipitationHumidityUV
January Weather22°C (72°F)46 mm (1.8 inches)84%very high
February Weather23°C (75°F)42 mm (1.6 inches)80%extreme
March Weather25°C (78°F)32 mm (1.3 inches)73%extreme
April Weather28°C (82°F)28 mm (1.1 inches)67%extreme
May Weather30°C (85°F)61 mm (2.4 inches)72%extreme
June Weather28°C (82°F)312 mm (12.3 inches)73%extreme
July Weather27°C (81°F)234 mm (9.2 inches)76%extreme
August Weather27°C (81°F)324 mm (12.8 inches)80%extreme
September Weather27°C (81°F)245 mm (9.6 inches)84%extreme
October Weather26°C (79°F)255 mm (10.0 inches)89%extreme
November Weather24°C (75°F)93 mm (3.6 inches)88%very high
December Weather22°C (73°F)42 mm (1.6 inches)88%very high

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