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September Weather in Osumacinta, Mexico

Last updated: August 27, 2025

In Osumacinta, Mexico, the average temperature in September hovers around 21°C (71°F). While you can expect minimums of 15°C (59°F) and the occasional maximum of 30°C (86°F), be prepared for a moist atmosphere with an average humidity of 87%. Don't forget your umbrella, as precipitation amounts can reach 249 mm (9.8 in) over 26 days!

September Temperature in Osumacinta

In September in Osumacinta, the average temperature is 21°C (71°F), with maximums reaching 30°C (86°F) and minimums dipping as low as 15°C (59°F). This pleasant climate makes it an ideal time for exploring the sights and enjoying outdoor activities.

September Weather in Osumacinta: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Osumacinta, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Osumacinta, September typically has an average temperature of 21°C (71°F), with highs reaching up to 30°C (86°F) and lows dropping to around 15°C (59°F).
JanFebMarAprMayJunJulAugSepOctNovDec646769727371717171706765
Data source: Temperature data for Osumacinta 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 Osumacinta

In Osumacinta, in September, the precipitation amount is 249 mm (9.8 in) spread over 26 days.

September Precipitation Trends in Osumacinta

The chart displays monthly precipitation patterns in Osumacinta, 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 Osumacinta, September typically receives around 249 mm (9.8 inches) of precipitation spread over approximately 26 days.
JanFebMarAprMayJunJulAugSepOctNovDec261315341172851281782492205832
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Osumacinta

In Osumacinta in September humidity is 87%. With an average temperature of 21°C (71°F), this humidity feels like a warm, enveloping blanket that clings to your skin, making outdoor activities seem more strenuous and necessitating frequent breaks in the shade for comfort.

September Average Humidity in Osumacinta

This chart illustrates the average monthly humidity levels in Osumacinta, 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 Osumacinta is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%76%66%59%64%69%82%87%87%88%88%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Osumacinta

In Osumacinta 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 Osumacinta.

Maximum UV Index Levels in Osumacinta for September

The chart shows the monthly maximum UV Index (UVI) for Osumacinta 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 Osumacinta typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec10121414141414131312109
Data source: Osumacinta 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 Osumacinta Compares to Other Months

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

This table compares monthly weather conditions in Osumacinta, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather18°C (65°F)26 mm (1.0 inches)83%very high
February Weather19°C (67°F)13 mm (0.5 inches)76%extreme
March Weather21°C (70°F)15 mm (0.6 inches)66%extreme
April Weather22°C (73°F)34 mm (1.3 inches)59%extreme
May Weather23°C (74°F)116 mm (4.6 inches)64%extreme
June Weather22°C (72°F)285 mm (11.2 inches)69%extreme
July Weather22°C (71°F)128 mm (5.1 inches)82%extreme
August Weather22°C (71°F)178 mm (7.0 inches)87%extreme
September Weather21°C (71°F)249 mm (9.8 inches)87%extreme
October Weather21°C (70°F)220 mm (8.7 inches)88%extreme
November Weather19°C (67°F)58 mm (2.3 inches)88%very high
December Weather18°C (65°F)32 mm (1.3 inches)88%very high

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