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September Weather in Trinity, United States

Last updated: June 24, 2025

In September, the average temperature in Trinity, United States reaches a warm 27°C (81°F), with a pleasant range that dips to a minimum of 22°C (73°F) and peaks at 32°C (89°F). Visitors should be prepared for some rain, as the region receives about 138 mm (5.4 in) of precipitation over 18 days. The air is quite humid, with an average humidity of 83%, creating a tropical feel that's perfect for exploring.

September Temperature in Trinity

In September in Trinity, the average temperature is 27°C (81°F), with a maximum that can reach 32°C (89°F) and a minimum as low as 22°C (73°F). This warm and pleasant weather makes it an ideal time for outdoor activities and exploration.

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

The chart illustrates September temperature patterns in Trinity, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Trinity, September typically has an average temperature of 27°C (81°F), with highs reaching up to 32°C (89°F) and lows dropping to around 22°C (73°F).
JanFebMarAprMayJunJulAugSepOctNovDec606467727781828281786964
Data source: Temperature data for Trinity 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 Trinity

In Trinity in September, the precipitation amount is 138 mm (5.4 in), occurring over the course of 18 days.

September Precipitation Trends in Trinity

The chart displays monthly precipitation patterns in Trinity, 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 Trinity, September typically receives around 138 mm (5.4 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec48612169108151216235138734583
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Trinity

In Trinity in September humidity is 83%. With an average temperature of 27°C (81°F), this humidity feels like a warm blanket enveloping you, making sightseeing and outdoor activities feel more exhausting and requiring frequent breaks to relax in the shade or cool off.

September Average Humidity in Trinity

This chart illustrates the average monthly humidity levels in Trinity, 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 Trinity is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%82%78%77%75%76%79%78%83%81%83%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Trinity

In Trinity in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Trinity.

Maximum UV Index Levels in Trinity for September

The chart shows the monthly maximum UV Index (UVI) for Trinity 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 Trinity typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec689111112121111975
Data source: Trinity 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 Trinity Compares to Other Months

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

This table compares monthly weather conditions in Trinity, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather16°C (61°F)48 mm (1.9 inches)83%high
February Weather18°C (65°F)60 mm (2.4 inches)82%very high
March Weather20°C (67°F)21 mm (0.8 inches)78%very high
April Weather22°C (72°F)69 mm (2.7 inches)77%extreme
May Weather25°C (77°F)108 mm (4.2 inches)75%extreme
June Weather27°C (81°F)151 mm (5.9 inches)76%extreme
July Weather28°C (82°F)216 mm (8.5 inches)79%extreme
August Weather28°C (83°F)235 mm (9.3 inches)78%extreme
September Weather27°C (81°F)138 mm (5.4 inches)83%extreme
October Weather25°C (78°F)73 mm (2.9 inches)81%very high
November Weather20°C (69°F)45 mm (1.8 inches)83%high
December Weather18°C (64°F)83 mm (3.3 inches)86%moderate

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