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July Weather in Fontana, United States

Last updated: June 24, 2025

In Fontana, United States, the average temperature in July is a comfortable 24°C (75°F). However, be prepared for some variation, as temperatures can dip to a minimum of 12°C (54°F) and soar up to a maximum of 34°C (93°F). During this month, expect about 84 mm (3.3 in) of precipitation spread over 10 days, contributing to an average humidity level of 78%—perfect for enjoying the lush landscapes.

July Temperature in Fontana

In July in Fontana, the average temperature is 24°C (75°F). Maximum temperatures can reach 34°C (93°F), while the minimum can drop to as low as 12°C (54°F). It's a great time to explore and enjoy outdoor activities in Fontana.

July Weather in Fontana: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in Fontana, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fontana, July typically has an average temperature of 24°C (75°F), with highs reaching up to 34°C (93°F) and lows dropping to around 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec232537465970757266523731
Data source: Temperature data for Fontana generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

July Precipitation in Fontana

In Fontana in July, the precipitation amount is 84 mm (3.3 in) over a span of 10 days.

July Precipitation Trends in Fontana

The chart displays monthly precipitation patterns in Fontana, 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 Fontana, July typically receives around 84 mm (3.3 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec61586611015411584911041194952
Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.
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July Humidity in Fontana

In Fontana in July humidity is 78%. With an average temperature of 24°C (75°F), this humidity feels like a warm blanket wrapping around you, making travel sticky and heavy but also inviting, as long as you're prepared with plenty of water and light clothing.

July Average Humidity in Fontana

This chart illustrates the average monthly humidity levels in Fontana, 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 Fontana is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%85%85%78%80%78%76%79%83%88%82%
Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in Fontana

In Fontana in July, 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 Fontana.

Maximum UV Index Levels in Fontana for July

The chart shows the monthly maximum UV Index (UVI) for Fontana 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 Fontana typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689101098532
Data source: Fontana 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 Fontana Compares to Other Months

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

This table compares monthly weather conditions in Fontana, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (23°F)61 mm (2.4 inches)85%moderate
February Weather-4°C (25°F)58 mm (2.3 inches)85%moderate
March Weather3°C (37°F)66 mm (2.6 inches)85%high
April Weather8°C (47°F)110 mm (4.3 inches)85%very high
May Weather15°C (60°F)154 mm (6.0 inches)78%very high
June Weather21°C (71°F)115 mm (4.5 inches)80%very high
July Weather24°C (75°F)84 mm (3.3 inches)78%very high
August Weather22°C (72°F)91 mm (3.6 inches)76%very high
September Weather19°C (66°F)104 mm (4.1 inches)79%very high
October Weather11°C (53°F)119 mm (4.7 inches)83%moderate
November Weather3°C (37°F)49 mm (1.9 inches)88%moderate
December Weather-1°C (31°F)52 mm (2.1 inches)81%low

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