September Weather in Summerlin South, United States

Last updated: June 24, 2025

In Summerlin South, United States, the average temperature in September is a warm 27°C (81°F). Expect the mercury to dip as low as 10°C (50°F) and rise to a sizzling 43°C (110°F). While you're soaking up the sun, be prepared for a brief 5 mm (0.2 in) of precipitation spread over 1 day, and enjoy the typically low average humidity of 41%.

September Temperature in Summerlin South

In September in Summerlin South, the average temperature is 27°C (81°F). Maximums can reach 43°C (110°F), while minimums can drop to as low as 10°C (50°F). Be prepared for a wide range of temperatures when traveling during this time.

September Weather in Summerlin South: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Summerlin South, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Summerlin South, September typically has an average temperature of 27°C (81°F), with highs reaching up to 43°C (110°F) and lows dropping to around 10°C (50°F).

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

September Precipitation in Summerlin South

In Summerlin South in September, the precipitation amount is 5 mm (0.2 in) over a duration of 1 day.

September Precipitation Trends in Summerlin South

The chart displays monthly precipitation patterns in Summerlin South, 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 Summerlin South, September typically receives around 5 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 Summerlin South

In Summerlin South in September humidity is 41%. With an average temperature of 27°C (81°F), this humidity feels like a warm embrace, making it comfortable for exploring outdoor attractions without overwhelming discomfort.

September Average Humidity in Summerlin South

This chart illustrates the average monthly humidity levels in Summerlin South, 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 Summerlin South 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 Summerlin South

In Summerlin South 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 Summerlin South.

Maximum UV Index Levels in Summerlin South for September

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

Data source: Summerlin South 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 Summerlin South Compares to Other Months

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

This table compares monthly weather conditions in Summerlin South, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (47°F)	19 mm (0.7 inches)	76%	moderate
February Weather	9°C (49°F)	22 mm (0.9 inches)	80%	high
March Weather	13°C (56°F)	19 mm (0.8 inches)	69%	very high
April Weather	19°C (66°F)	6 mm (0.2 inches)	57%	very high
May Weather	23°C (73°F)	8 mm (0.3 inches)	45%	extreme
June Weather	30°C (86°F)	1 mm (0.0 inches)	34%	extreme
July Weather	32°C (91°F)	17 mm (0.7 inches)	29%	extreme
August Weather	32°C (90°F)	11 mm (0.4 inches)	28%	extreme
September Weather	27°C (81°F)	5 mm (0.2 inches)	41%	very high
October Weather	19°C (66°F)	4 mm (0.2 inches)	54%	high
November Weather	13°C (56°F)	13 mm (0.5 inches)	68%	moderate
December Weather	8°C (46°F)	17 mm (0.7 inches)	75%	moderate