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September Weather in San Javier, Mexico

Last updated: August 27, 2025

In San Javier, Mexico, the average temperature in September is a warm 28°C (82°F), with a comfortable minimum of 19°C (67°F) and a toasty maximum reaching 39°C (102°F). Expect about 87 mm (3.4 in) of precipitation spread over 12 days, contributing to an average humidity of 82%. Ideal for those who enjoy a tropical climate!

September Temperature in San Javier

In September in San Javier, the average temperature is 28°C (82°F), with maximums reaching up to 39°C (102°F) and minimums dropping as low as 19°C (67°F). This makes San Javier an ideal destination for travelers seeking warm and sunny weather.

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

The chart illustrates September temperature patterns in San Javier, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Javier, September typically has an average temperature of 28°C (82°F), with highs reaching up to 39°C (102°F) and lows dropping to around 19°C (67°F).
JanFebMarAprMayJunJulAugSepOctNovDec636570768186838382807264
Data source: Temperature data for San Javier 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 Javier

In San Javier in September, the precipitation amount is 87 mm (3.4 in) over the course of 12 days.

September Precipitation Trends in San Javier

The chart displays monthly precipitation patterns in San Javier, 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 Javier, September typically receives around 87 mm (3.4 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec182913113311911087244320
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Javier

In San Javier in September humidity is 82%. With an average temperature of 28°C (82°F), this humidity feels like walking through a warm, dense blanket, making outdoor activities a challenge and necessitating frequent breaks to stay hydrated.

September Average Humidity in San Javier

This chart illustrates the average monthly humidity levels in San Javier, 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 Javier is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%67%60%51%47%50%70%82%82%78%78%81%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Javier

In San Javier in September, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in San Javier.

Maximum UV Index Levels in San Javier for September

The chart shows the monthly maximum UV Index (UVI) for San Javier 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 Javier typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec69101313121212121076
Data source: San Javier 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 Javier Compares to Other Months

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

This table compares monthly weather conditions in San Javier, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather17°C (63°F)18 mm (0.7 inches)74%high
February Weather18°C (65°F)29 mm (1.1 inches)67%very high
March Weather21°C (70°F)13 mm (0.5 inches)60%very high
April Weather24°C (76°F)1 mm (0.0 inches)51%extreme
May Weather27°C (81°F)1 mm (0.0 inches)47%extreme
June Weather30°C (86°F)33 mm (1.3 inches)50%extreme
July Weather28°C (83°F)119 mm (4.7 inches)70%extreme
August Weather28°C (83°F)110 mm (4.3 inches)81%extreme
September Weather28°C (82°F)87 mm (3.4 inches)82%extreme
October Weather27°C (80°F)23 mm (0.9 inches)78%very high
November Weather22°C (72°F)43 mm (1.7 inches)78%high
December Weather18°C (65°F)20 mm (0.8 inches)80%high

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