June Weather in Fontana, United States

Last updated: June 24, 2025

In June, the average temperature in Fontana, United States is a pleasant 23°C (73°F). Expect a comfortable range, with minimums dipping to 12°C (53°F) and highs soaring to an impressive 41°C (105°F). Rainfall is minimal, with just 3 mm (0.1 in) recorded over 0 days, and humidity levels hover around a cozy 72%. Enjoy the weather!

June Temperature in Fontana

In June in Fontana, the average temperature is 23°C (73°F). Maximums can reach 41°C (105°F), while minimums can drop to as low as 12°C (53°F). Be prepared for a wide range of temperatures, making it essential to pack accordingly for your travels.

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

The chart illustrates June 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, June typically has an average temperature of 23°C (73°F), with highs reaching up to 41°C (105°F) and lows dropping to around 12°C (53°F).

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

June Precipitation in Fontana

In Fontana in June, the precipitation amount is 3 mm (0.1 in) during a total of 0 days.

June Precipitation Trends in Fontana

The chart displays monthly precipitation patterns in Fontana, with values for each month alongside June’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how June’s conditions compare to those of other months. In Fontana, June typically receives around 3 mm (0.1 inches) of precipitation spread over approximately 0 days.

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

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Millimeters (mm) Inches (in)

June Humidity in Fontana

In Fontana in June, humidity is 72%. With an average temperature of 23°C (73°F), this humidity feels like a warm embrace, making travel exhilarating yet slightly sticky, as the air clings to your skin and invites you to seek out cool, refreshing places to explore.

June Average Humidity in Fontana

This chart illustrates the average monthly humidity levels in Fontana, with June’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In June, average humidity in Fontana is approximately 72%, offering insight into how humid the weather typically is during this month.

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

June UV Index in Fontana

In Fontana in June, 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 Fontana.

Maximum UV Index Levels in Fontana for June

The chart shows the monthly maximum UV Index (UVI) for Fontana in June, 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 June, the maximum UV index in Fontana typically reaches 12, which falls under the extreme exposure category.

Data source: Fontana June 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 June 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 June’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 June’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