September Weather in Henderson, United States

Last updated: June 24, 2025

In September, the weather in Henderson, United States averages a pleasant 18°C (65°F). However, be prepared for a range, as temperatures can drop to 2°C (35°F) or soar up to 33°C (91°F). Rain is likely, with an average precipitation of 124 mm (4.9 in) spread over 10 days, and humidity levels can reach a high 81%.

September Temperature in Henderson

In September in Henderson, the average temperature is 18°C (65°F). The maximum can reach 33°C (91°F), while the minimum can be as low as 2°C (35°F). Pack accordingly for a varied climate to fully enjoy your trip to Henderson.

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

The chart illustrates September temperature patterns in Henderson, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Henderson, September typically has an average temperature of 18°C (65°F), with highs reaching up to 33°C (91°F) and lows dropping to around 2°C (35°F).

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

September Precipitation in Henderson

In Henderson in September, the precipitation amount is 124 mm (4.9 in) spread over a duration of 10 days.

September Precipitation Trends in Henderson

The chart displays monthly precipitation patterns in Henderson, 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 Henderson, September typically receives around 124 mm (4.9 inches) of precipitation spread over approximately 10 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 Henderson

In Henderson in September, humidity is 81%. With an average temperature of 18°C (65°F), this humidity feels like a thick blanket wrapping around you, making every step feel heavier and the air thick and sultry—a challenging environment for traveling.

September Average Humidity in Henderson

This chart illustrates the average monthly humidity levels in Henderson, 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 Henderson is approximately 81%, 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 Henderson

In Henderson in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Henderson.

Maximum UV Index Levels in Henderson for September

The chart shows the monthly maximum UV Index (UVI) for Henderson 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 Henderson typically reaches 8, which falls under the very high exposure category.

Data source: Henderson 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 Henderson Compares to Other Months

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

This table compares monthly weather conditions in Henderson, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-9°C (17°F)	30 mm (1.2 inches)	87%	moderate
February Weather	-9°C (16°F)	31 mm (1.2 inches)	90%	moderate
March Weather	1°C (33°F)	64 mm (2.5 inches)	85%	moderate
April Weather	6°C (44°F)	84 mm (3.3 inches)	84%	very high
May Weather	15°C (60°F)	131 mm (5.2 inches)	78%	very high
June Weather	22°C (72°F)	98 mm (3.9 inches)	80%	very high
July Weather	23°C (74°F)	119 mm (4.7 inches)	81%	very high
August Weather	21°C (71°F)	134 mm (5.3 inches)	81%	very high
September Weather	18°C (65°F)	124 mm (4.9 inches)	81%	very high
October Weather	9°C (49°F)	92 mm (3.6 inches)	84%	moderate
November Weather	1°C (34°F)	32 mm (1.3 inches)	88%	moderate
December Weather	-5°C (24°F)	43 mm (1.7 inches)	84%	low