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September Weather in La Porte, United States

Last updated: June 24, 2025

In La Porte, United States, the average temperature in September hovers around 20°C (68°F), offering a pleasant climate. Expect minimums as low as 4°C (40°F) and maximums reaching up to 33°C (92°F). This month sees an average precipitation of 74 mm (2.9 in) spread across 9 days, complemented by an average humidity of 78%.

September Temperature in La Porte

In September, in La Porte, the average temperature is 20°C (68°F). Maximums can reach 33°C (92°F), and minimums can be as low as 4°C (40°F). It's advisable to pack layers to accommodate both warm days and cooler nights while enjoying your travels.

September Weather in La Porte: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in La Porte, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In La Porte, September typically has an average temperature of 20°C (68°F), with highs reaching up to 33°C (92°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec282939496172757368554034
Data source: Temperature data for La Porte 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 La Porte

In La Porte in September, the precipitation amount is 74 mm (2.9 in), which occurs over a span of 9 days.

September Precipitation Trends in La Porte

The chart displays monthly precipitation patterns in La Porte, 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 La Porte, September typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec7273102110173145119114741317261
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in La Porte

In La Porte in September humidity is 78%. With an average temperature of 20°C (68°F), this humidity feels like a warm, enveloping blanket that makes exploring the sights a bit sticky, so travelers should stay hydrated and take frequent breaks in the shade.

September Average Humidity in La Porte

This chart illustrates the average monthly humidity levels in La Porte, 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 La Porte is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%86%87%81%82%81%79%78%81%89%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in La Porte

In La Porte in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in La Porte.

Maximum UV Index Levels in La Porte for September

The chart shows the monthly maximum UV Index (UVI) for La Porte 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 La Porte typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689101098642
Data source: La Porte 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 La Porte Compares to Other Months

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

This table compares monthly weather conditions in La Porte, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)71 mm (2.8 inches)85%moderate
February Weather-2°C (29°F)73 mm (2.9 inches)85%moderate
March Weather4°C (40°F)102 mm (4.0 inches)86%high
April Weather9°C (49°F)110 mm (4.3 inches)87%very high
May Weather16°C (62°F)173 mm (6.8 inches)81%very high
June Weather22°C (72°F)145 mm (5.7 inches)82%very high
July Weather24°C (76°F)119 mm (4.7 inches)81%very high
August Weather23°C (73°F)114 mm (4.5 inches)79%very high
September Weather20°C (68°F)74 mm (2.9 inches)78%very high
October Weather13°C (56°F)131 mm (5.2 inches)81%high
November Weather5°C (41°F)72 mm (2.8 inches)89%moderate
December Weather1°C (34°F)61 mm (2.4 inches)86%low

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