July Weather in Rancho Cucamonga, United States

Last updated: June 24, 2025

In July, the average temperature in Rancho Cucamonga, United States is a pleasant 26°C (80°F). Expect temperatures ranging from a cool 14°C (58°F) to a sweltering 45°C (112°F). Rainfall is minimal, with only 1 mm (0.1 in) predicted over 0 days. Humidity remains moderate at an average of 73%, making for a comfortable climate overall. 🌞

July Temperature in Rancho Cucamonga

In July, in Rancho Cucamonga, the average temperature is 26°C (80°F). The maximum can reach 45°C (112°F), and the minimum can be as low as 14°C (58°F). Therefore, travelers should be prepared for a wide range of temperatures, ensuring they pack accordingly to enjoy their trip comfortably.

July Weather in Rancho Cucamonga: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in Rancho Cucamonga, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rancho Cucamonga, July typically has an average temperature of 26°C (80°F), with highs reaching up to 45°C (112°F) and lows dropping to around 14°C (58°F).

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

July Precipitation in Rancho Cucamonga

In Rancho Cucamonga in July, the precipitation amount is 1 mm (0.1 in) during 0 days, indicating a very dry period.

July Precipitation Trends in Rancho Cucamonga

The chart displays monthly precipitation patterns in Rancho Cucamonga, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Rancho Cucamonga, July typically receives around 1 mm (0.1 inches) of precipitation spread over approximately 0 days.

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

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Millimeters (mm) Inches (in)

July Humidity in Rancho Cucamonga

In Rancho Cucamonga in July, humidity is 73%. With an average temperature of 26°C (80°F), this humidity feels like a warm embrace that clings to your skin, making outdoor exploration a bit sticky but still inviting, perfect for leisurely strolls in the shade or refreshing breaks by the water.

July Average Humidity in Rancho Cucamonga

This chart illustrates the average monthly humidity levels in Rancho Cucamonga, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Rancho Cucamonga is approximately 73%, offering insight into how humid the weather typically is during this month.

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

July UV Index in Rancho Cucamonga

In Rancho Cucamonga in July, 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 Rancho Cucamonga.

Maximum UV Index Levels in Rancho Cucamonga for July

The chart shows the monthly maximum UV Index (UVI) for Rancho Cucamonga in July, 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 July, the maximum UV index in Rancho Cucamonga typically reaches 11, which falls under the extreme exposure category.

Data source: Rancho Cucamonga July 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 July Weather in Rancho Cucamonga Compares to Other Months

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

This table compares monthly weather conditions in Rancho Cucamonga, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (54°F)	87 mm (3.4 inches)	74%	moderate
February Weather	12°C (54°F)	84 mm (3.3 inches)	79%	high
March Weather	14°C (57°F)	95 mm (3.7 inches)	75%	very high
April Weather	17°C (63°F)	35 mm (1.4 inches)	70%	very high
May Weather	18°C (66°F)	23 mm (0.9 inches)	70%	very high
June Weather	23°C (73°F)	3 mm (0.1 inches)	72%	extreme
July Weather	26°C (80°F)	1 mm (0.1 inches)	73%	extreme
August Weather	26°C (80°F)	2 mm (0.1 inches)	69%	very high
September Weather	24°C (76°F)	5 mm (0.2 inches)	68%	very high
October Weather	20°C (69°F)	15 mm (0.6 inches)	67%	high
November Weather	16°C (61°F)	35 mm (1.4 inches)	68%	moderate
December Weather	12°C (54°F)	87 mm (3.4 inches)	71%	moderate