September Weather in Hesperia, United States

Last updated: June 24, 2025

In September, the average temperature in Hesperia, United States is a pleasant 25°C (76°F). However, temperatures can range from a cool 9°C (48°F) to a scorching 42°C (107°F). Expect minimal rainfall, with an average precipitation of just 2 mm (0.1 in) over 0 days. The average humidity sits comfortably at 41%, making for ideal conditions throughout the month.

September Temperature in Hesperia

In September in Hesperia, the average temperature is 25°C (76°F), with maximums reaching 42°C (107°F) and minimums dropping as low as 9°C (48°F). Be prepared for a wide range of temperatures when traveling during this month.

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

The chart illustrates September temperature patterns in Hesperia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hesperia, September typically has an average temperature of 25°C (76°F), with highs reaching up to 42°C (107°F) and lows dropping to around 9°C (48°F).

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

September Precipitation in Hesperia

In Hesperia in September, the precipitation amount is 2 mm (0.1 in) during a span of 0 days.

September Precipitation Trends in Hesperia

The chart displays monthly precipitation patterns in Hesperia, 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 Hesperia, September typically receives around 2 mm (0.1 inches) of precipitation spread over approximately 0 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 Hesperia

In Hesperia in September, humidity is 41%. With an average temperature of 25°C (76°F), this humidity feels like a refreshing embrace, making it comfortable for traveling as you explore the sights with ease.

September Average Humidity in Hesperia

This chart illustrates the average monthly humidity levels in Hesperia, 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 Hesperia 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 Hesperia

In Hesperia 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 Hesperia.

Maximum UV Index Levels in Hesperia for September

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

Data source: Hesperia 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 Hesperia Compares to Other Months

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

This table compares monthly weather conditions in Hesperia, 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 (48°F)	35 mm (1.4 inches)	76%	moderate
February Weather	10°C (49°F)	40 mm (1.6 inches)	80%	high
March Weather	12°C (53°F)	40 mm (1.6 inches)	69%	very high
April Weather	16°C (61°F)	17 mm (0.7 inches)	57%	extreme
May Weather	19°C (67°F)	7 mm (0.3 inches)	45%	extreme
June Weather	25°C (77°F)	2 mm (0.1 inches)	34%	extreme
July Weather	28°C (83°F)	6 mm (0.2 inches)	29%	extreme
August Weather	28°C (82°F)	6 mm (0.2 inches)	28%	extreme
September Weather	25°C (76°F)	2 mm (0.1 inches)	41%	very high
October Weather	18°C (65°F)	5 mm (0.2 inches)	54%	very high
November Weather	13°C (56°F)	13 mm (0.5 inches)	68%	moderate
December Weather	8°C (47°F)	44 mm (1.7 inches)	75%	moderate