September Weather in Twentynine Palms, United States

Last updated: June 24, 2025

In Twentynine Palms, United States during September, the average temperature hovers around 29°C (84°F), but be prepared for a range from a cool 11°C (53°F) to a scorching 45°C (113°F). With only 3 mm (0.1 in) of precipitation over 1 day, you'll likely enjoy dry conditions. Don’t forget, the average humidity stands at a comfortable 41%, making this a great time to explore!

September Temperature in Twentynine Palms

In September in Twentynine Palms, the average temperature is 29°C (84°F), with maximums reaching up to 45°C (113°F) and minimums dropping as low as 11°C (53°F). Be prepared for a wide range of temperatures, making it essential to pack accordingly for your travels.

September Weather in Twentynine Palms: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Twentynine Palms, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Twentynine Palms, September typically has an average temperature of 29°C (84°F), with highs reaching up to 45°C (113°F) and lows dropping to around 11°C (53°F).

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

September Precipitation in Twentynine Palms

In Twentynine Palms in September, the precipitation amount is 3 mm (0.1 in) over the course of 1 day.

September Precipitation Trends in Twentynine Palms

The chart displays monthly precipitation patterns in Twentynine Palms, 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 Twentynine Palms, September typically receives around 3 mm (0.1 inches) of precipitation spread over approximately 1 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Twentynine Palms

In Twentynine Palms in September, humidity is 41%. With an average temperature of 29°C (84°F), this humidity feels like a warm embrace, making traveling comfortable but a bit sticky, requiring light clothing and plenty of water to stay hydrated.

September Average Humidity in Twentynine Palms

This chart illustrates the average monthly humidity levels in Twentynine Palms, 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 Twentynine Palms is approximately 41%, 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 Twentynine Palms

In Twentynine Palms 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 Twentynine Palms.

Maximum UV Index Levels in Twentynine Palms for September

The chart shows the monthly maximum UV Index (UVI) for Twentynine Palms 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 Twentynine Palms typically reaches 10, which falls under the very high exposure category.

Data source: Twentynine Palms 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 Twentynine Palms Compares to Other Months

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

This table compares monthly weather conditions in Twentynine Palms, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	11°C (52°F)	15 mm (0.6 inches)	76%	moderate
February Weather	12°C (54°F)	17 mm (0.7 inches)	80%	high
March Weather	15°C (60°F)	14 mm (0.6 inches)	69%	very high
April Weather	21°C (70°F)	8 mm (0.3 inches)	57%	very high
May Weather	24°C (76°F)	2 mm (0.1 inches)	45%	extreme
June Weather	30°C (87°F)	1 mm (0.0 inches)	34%	extreme
July Weather	33°C (92°F)	13 mm (0.5 inches)	29%	extreme
August Weather	33°C (91°F)	7 mm (0.3 inches)	28%	extreme
September Weather	29°C (84°F)	3 mm (0.1 inches)	41%	very high
October Weather	21°C (70°F)	5 mm (0.2 inches)	54%	very high
November Weather	15°C (60°F)	5 mm (0.2 inches)	68%	moderate
December Weather	10°C (51°F)	19 mm (0.7 inches)	75%	moderate