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September Weather in San Joaquin, Mexico

Last updated: August 27, 2025

In September in San Joaquin, Mexico, the average temperature hovers around 20°C (68°F), with a minimum of 10°C (50°F) and a maximum reaching up to 31°C (88°F). Expect 150 mm (5.9 in) of precipitation over 21 days, contributing to an average humidity of 84%. Prepare for a mix of warmth and moisture!

September Temperature in San Joaquin

In September in San Joaquin, the average temperature is 20°C (68°F). Maximums can reach 31°C (88°F), and minimums can be as low as 10°C (50°F). This mild climate makes San Joaquin an ideal destination for travelers seeking pleasant weather and outdoor activities during this time.

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

The chart illustrates September temperature patterns in San Joaquin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Joaquin, September typically has an average temperature of 20°C (68°F), with highs reaching up to 31°C (88°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec576265707270697068656158
Data source: Temperature data for San Joaquin 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 Joaquin

In San Joaquin in September, the precipitation amount reaches 150 mm (5.9 in) over a span of 21 days.

September Precipitation Trends in San Joaquin

The chart displays monthly precipitation patterns in San Joaquin, 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 Joaquin, September typically receives around 150 mm (5.9 inches) of precipitation spread over approximately 21 days.
JanFebMarAprMayJunJulAugSepOctNovDec1413203261131100991501063110
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Joaquin

In San Joaquin 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 Joaquin

This chart illustrates the average monthly humidity levels in San Joaquin, 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 Joaquin 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 Joaquin

In San Joaquin 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 San Joaquin.

Maximum UV Index Levels in San Joaquin for September

The chart shows the monthly maximum UV Index (UVI) for San Joaquin 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 Joaquin typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec811131414141413131297
Data source: San Joaquin 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 Joaquin Compares to Other Months

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

This table compares monthly weather conditions in San Joaquin, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather14°C (58°F)14 mm (0.6 inches)88%very high
February Weather17°C (62°F)13 mm (0.5 inches)86%extreme
March Weather18°C (66°F)20 mm (0.8 inches)83%extreme
April Weather21°C (70°F)32 mm (1.3 inches)80%extreme
May Weather22°C (73°F)61 mm (2.4 inches)82%extreme
June Weather21°C (70°F)130 mm (5.1 inches)79%extreme
July Weather21°C (70°F)100 mm (3.9 inches)72%extreme
August Weather21°C (70°F)99 mm (3.9 inches)74%extreme
September Weather20°C (68°F)150 mm (5.9 inches)84%extreme
October Weather18°C (66°F)106 mm (4.2 inches)92%extreme
November Weather16°C (61°F)31 mm (1.2 inches)91%very high
December Weather14°C (58°F)10 mm (0.4 inches)91%high

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