nomadseason

September Weather in San Javier, Mexico

Last updated: August 27, 2025

In September, the average temperature in San Javier, Mexico is a pleasant 20°C (68°F). However, you can expect temperatures to vary, with a minimum of 9°C (49°F) and a maximum reaching up to 32°C (89°F). During this month, precipitation averages 109 mm (4.3 in) over about 18 days, accompanied by an average humidity of 84%. Prepare accordingly for a mix of warm days and occasional rain!

September Temperature in San Javier

In September in San Javier, the average temperature is 20°C (68°F). Maximums can reach 32°C (89°F), while minimums can be as low as 9°C (49°F). This diverse temperature range makes San Javier an ideal destination for travelers seeking both warm days and cooler evenings.

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 20°C (68°F), with highs reaching up to 32°C (89°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec596367727471707068666259
Data source: Temperature data for San Javier generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
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 total precipitation amount is 109 mm (4.3 in) spread over 18 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 109 mm (4.3 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec65131734102757610962205
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in San Javier

In San Javier in September humidity is 84%. With an average temperature of 20°C (68°F), this humidity feels like a warm, enveloping blanket, making travel a challenge as the air clings to your skin, and every step feels heavier in the mugginess.

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 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%86%83%80%82%79%72%74%84%92%91%91%
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 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 Javier, you can check here.

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 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911141415141414141298
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 Weather15°C (59°F)6 mm (0.2 inches)88%very high
February Weather17°C (64°F)5 mm (0.2 inches)86%extreme
March Weather20°C (67°F)13 mm (0.5 inches)83%extreme
April Weather22°C (72°F)17 mm (0.7 inches)80%extreme
May Weather23°C (74°F)34 mm (1.3 inches)82%extreme
June Weather21°C (71°F)102 mm (4.0 inches)79%extreme
July Weather21°C (70°F)75 mm (3.0 inches)72%extreme
August Weather21°C (70°F)76 mm (3.0 inches)74%extreme
September Weather20°C (68°F)109 mm (4.3 inches)84%extreme
October Weather19°C (66°F)62 mm (2.4 inches)92%extreme
November Weather17°C (62°F)19 mm (0.8 inches)91%very high
December Weather15°C (60°F)5 mm (0.2 inches)91%very high

Compare San Javier's Climate with Cities Worldwide