July Weather in San Bernardino, United States

Last updated: June 24, 2025

In July, the average temperature in San Bernardino, United States hovers around 26°C (78°F), offering a pleasant climate for outdoor activities. However, be prepared for a range of temperatures, with a minimum of 13°C (56°F) and a scorching maximum of 42°C (109°F). Precipitation is relatively low, averaging just 11 mm (0.4 in) over 2 days. Additionally, the average humidity is a comfortable 46%, making it an ideal time to explore!

July Temperature in San Bernardino

In July in San Bernardino, the average temperature is 26°C (78°F). Maximum temperatures can reach 42°C (109°F), while minimums can drop to as low as 13°C (56°F). Travelers should be prepared for hot days and cooler evenings.

July Weather in San Bernardino: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in San Bernardino, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Bernardino, July typically has an average temperature of 26°C (78°F), with highs reaching up to 42°C (109°F) and lows dropping to around 13°C (56°F).

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

July Precipitation in San Bernardino

In San Bernardino in July, the precipitation amount is 11 mm (0.4 in) over the course of 2 days.

July Precipitation Trends in San Bernardino

The chart displays monthly precipitation patterns in San Bernardino, 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 San Bernardino, July typically receives around 11 mm (0.4 inches) of precipitation spread over approximately 2 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 San Bernardino

In San Bernardino in July humidity is 46%. With an average temperature of 26°C (78°F), this humidity feels like a comfortable embrace, making it pleasant for traveling while still bringing a refreshing lightness to the air, perfect for exploring outdoor attractions and enjoying long walks.

July Average Humidity in San Bernardino

This chart illustrates the average monthly humidity levels in San Bernardino, 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 San Bernardino is approximately 46%, 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 San Bernardino

In San Bernardino in July, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in San Bernardino.

Maximum UV Index Levels in San Bernardino for July

The chart shows the monthly maximum UV Index (UVI) for San Bernardino 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 San Bernardino typically reaches 12, which falls under the extreme exposure category.

Data source: San Bernardino 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 San Bernardino Compares to Other Months

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

This table compares monthly weather conditions in San Bernardino, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	11°C (51°F)	70 mm (2.8 inches)	72%	moderate
February Weather	11°C (52°F)	70 mm (2.7 inches)	77%	high
March Weather	12°C (54°F)	75 mm (2.9 inches)	67%	very high
April Weather	16°C (61°F)	31 mm (1.2 inches)	56%	very high
May Weather	18°C (64°F)	18 mm (0.7 inches)	46%	extreme
June Weather	22°C (72°F)	3 mm (0.1 inches)	48%	extreme
July Weather	26°C (78°F)	11 mm (0.4 inches)	46%	extreme
August Weather	26°C (79°F)	10 mm (0.4 inches)	42%	extreme
September Weather	23°C (74°F)	10 mm (0.4 inches)	52%	very high
October Weather	19°C (66°F)	11 mm (0.4 inches)	58%	very high
November Weather	15°C (59°F)	28 mm (1.1 inches)	66%	moderate
December Weather	11°C (51°F)	70 mm (2.7 inches)	74%	moderate