September Weather in Thermal, United States

Last updated: June 24, 2025

In Thermal, United States, the average temperature in September hovers around 28°C (83°F), with extremes ranging from a cool 11°C (51°F) to a scorching 45°C (114°F). The month experiences minimal rain, with just 4 mm (0.2 in) of precipitation over a single day, and the air maintains a comfortable average humidity level of 52%.

September Temperature in Thermal

In September in Thermal, the average temperature is 28°C (83°F), with maximums reaching up to 45°C (114°F) and minimums dropping as low as 11°C (51°F). Be prepared for a diverse range of temperatures, making it essential to pack accordingly for your travels.

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

The chart illustrates September temperature patterns in Thermal, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Thermal, September typically has an average temperature of 28°C (83°F), with highs reaching up to 45°C (114°F) and lows dropping to around 11°C (51°F).

Data source: Temperature data for Thermal generated using information from the Copernicus Climate Change Service.

September Precipitation in Thermal

In Thermal in September, the precipitation amount is 4 mm (0.2 in) during 1 day.

September Precipitation Trends in Thermal

The chart displays monthly precipitation patterns in Thermal, 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 Thermal, September typically receives around 4 mm (0.2 inches) of precipitation spread over approximately 1 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Thermal

In Thermal in September humidity is 52%. With an average temperature of 28°C (83°F), this humidity feels like a warm embrace, making travel enjoyable yet slightly sticky, so staying hydrated and taking breaks in shaded areas is essential.

September Average Humidity in Thermal

This chart illustrates the average monthly humidity levels in Thermal, 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 Thermal is approximately 52%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Thermal

In Thermal 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 Thermal.

Maximum UV Index Levels in Thermal for September

The chart shows the monthly maximum UV Index (UVI) for Thermal 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 Thermal typically reaches 11, which falls under the extreme exposure category.

Data source: Thermal 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 Thermal Compares to Other Months

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

This table compares monthly weather conditions in Thermal, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (53°F)	28 mm (1.1 inches)	72%	moderate
February Weather	13°C (55°F)	28 mm (1.1 inches)	77%	high
March Weather	15°C (60°F)	18 mm (0.7 inches)	67%	very high
April Weather	20°C (68°F)	11 mm (0.4 inches)	56%	extreme
May Weather	23°C (73°F)	2 mm (0.1 inches)	46%	extreme
June Weather	29°C (84°F)	1 mm (0.0 inches)	48%	extreme
July Weather	32°C (89°F)	10 mm (0.4 inches)	46%	extreme
August Weather	32°C (89°F)	7 mm (0.3 inches)	42%	extreme
September Weather	28°C (83°F)	4 mm (0.2 inches)	52%	extreme
October Weather	21°C (71°F)	6 mm (0.2 inches)	58%	very high
November Weather	16°C (61°F)	10 mm (0.4 inches)	66%	moderate
December Weather	11°C (52°F)	27 mm (1.1 inches)	74%	moderate