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September Weather in Sulphur, United States

Last updated: June 24, 2025

In September, the average temperature in Sulphur, United States is a pleasant 24°C (76°F). However, be prepared for temperature fluctuations, as it can dip to a minimum of 8°C (47°F) and soar to a maximum of 37°C (98°F). During this month, precipitation typically totals 103 mm (4.1 in) over 7 days, with an average humidity level of 64%. Adjust your plans accordingly to fully enjoy the vibrant atmosphere of Sulphur!

September Temperature in Sulphur

In September in Sulphur, the average temperature is 24°C (76°F). The maximum can reach 37°C (98°F), while the minimum can drop as low as 8°C (47°F). This range of temperatures makes Sulphur an ideal destination for travelers seeking both warmth and the possibility of cooler evenings.

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

The chart illustrates September temperature patterns in Sulphur, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sulphur, September typically has an average temperature of 24°C (76°F), with highs reaching up to 37°C (98°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec424456617179838276645247
Data source: Temperature data for Sulphur 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 Sulphur

In Sulphur in September, the precipitation amount is 103 mm (4.1 in) over a span of 7 days.

September Precipitation Trends in Sulphur

The chart displays monthly precipitation patterns in Sulphur, 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 Sulphur, September typically receives around 103 mm (4.1 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec5480931111409654731031154254
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Sulphur

In Sulphur in September, humidity is 64%. With an average temperature of 24°C (76°F), this humidity feels like a warm, sticky embrace, making travel slightly uncomfortable but still enjoyable, as you may find yourself yearning for a refreshing breeze or a quick dip in the water.

September Average Humidity in Sulphur

This chart illustrates the average monthly humidity levels in Sulphur, 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 Sulphur is approximately 64%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%78%75%75%83%82%78%68%64%71%82%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Sulphur

In Sulphur in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Sulphur.

Maximum UV Index Levels in Sulphur for September

The chart shows the monthly maximum UV Index (UVI) for Sulphur 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 Sulphur typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111110854
Data source: Sulphur 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 Sulphur Compares to Other Months

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

This table compares monthly weather conditions in Sulphur, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)54 mm (2.1 inches)79%moderate
February Weather6°C (44°F)80 mm (3.2 inches)78%high
March Weather13°C (56°F)93 mm (3.7 inches)75%very high
April Weather16°C (61°F)111 mm (4.4 inches)75%very high
May Weather22°C (71°F)140 mm (5.5 inches)83%extreme
June Weather26°C (79°F)96 mm (3.8 inches)81%extreme
July Weather28°C (83°F)54 mm (2.1 inches)78%extreme
August Weather28°C (82°F)73 mm (2.9 inches)68%extreme
September Weather24°C (76°F)103 mm (4.1 inches)64%very high
October Weather18°C (64°F)115 mm (4.5 inches)71%very high
November Weather11°C (52°F)42 mm (1.7 inches)82%moderate
December Weather8°C (47°F)54 mm (2.1 inches)87%moderate

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