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September Weather in Altamira, Mexico

Last updated: August 26, 2025

In September, the average temperature in Altamira, Mexico reaches a warm 28°C (83°F). Expect a comfortable minimum of 23°C (73°F), while the mercury can occasionally soar to a maximum of 33°C (92°F). With an average humidity of 80%, it’s a humid month, and you may experience 133 mm (5.2 in) of precipitation spread across 20 days. Don’t forget your umbrella!

September Temperature in Altamira

In September in Altamira, the average temperature is 28°C (83°F). Maximums can reach 33°C (92°F) and minimums can be as low as 23°C (73°F). This pleasant climate makes it an ideal destination for travelers seeking warmth and sunshine.

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

The chart illustrates September temperature patterns in Altamira, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Altamira, September typically has an average temperature of 28°C (83°F), with highs reaching up to 33°C (92°F) and lows dropping to around 23°C (73°F).
JanFebMarAprMayJunJulAugSepOctNovDec687073788283838482797370
Data source: Temperature data for Altamira 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 Altamira

In Altamira in September, the precipitation amount is 133 mm (5.2 in) over the course of 20 days.

September Precipitation Trends in Altamira

The chart displays monthly precipitation patterns in Altamira, 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 Altamira, September typically receives around 133 mm (5.2 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec4318322261141127871331113218
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Altamira

In Altamira in September, humidity is 80%. With an average temperature of 28°C (83°F), this humidity feels like a thick blanket enveloping you, making travel feel sluggish and sticky, as every movement generates a sheen of perspiration that clings to your skin.

September Average Humidity in Altamira

This chart illustrates the average monthly humidity levels in Altamira, 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 Altamira is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%83%84%85%79%71%72%80%85%88%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Altamira

In Altamira 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 Altamira.

Maximum UV Index Levels in Altamira for September

The chart shows the monthly maximum UV Index (UVI) for Altamira 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 Altamira typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec79121212121312121086
Data source: Altamira 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 Altamira Compares to Other Months

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

This table compares monthly weather conditions in Altamira, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather20°C (68°F)43 mm (1.7 inches)87%high
February Weather21°C (70°F)18 mm (0.7 inches)85%very high
March Weather23°C (74°F)32 mm (1.3 inches)83%extreme
April Weather25°C (78°F)22 mm (0.9 inches)84%extreme
May Weather28°C (82°F)61 mm (2.4 inches)85%extreme
June Weather28°C (84°F)141 mm (5.5 inches)79%extreme
July Weather28°C (83°F)127 mm (5.0 inches)71%extreme
August Weather29°C (84°F)87 mm (3.4 inches)72%extreme
September Weather28°C (83°F)133 mm (5.2 inches)80%extreme
October Weather26°C (79°F)111 mm (4.4 inches)85%very high
November Weather23°C (74°F)32 mm (1.3 inches)88%very high
December Weather21°C (70°F)18 mm (0.7 inches)89%high

Compare Altamira's Climate with Cities Worldwide