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June Weather in Diamond Bar, United States

Last updated: June 24, 2025

In Diamond Bar, United States, the average temperature in June is a pleasant 21°C (70°F). Expect a minimum of 11°C (52°F) and a possible maximum of 36°C (98°F). Fortunately, you won't have to worry about rainfall, as the precipitation amount is a mere 1 mm (0.0 in) over 0 days, making it a dry month. With an average humidity of 72%, it's the perfect time to explore the outdoors!

June Temperature in Diamond Bar

In June, Diamond Bar enjoys a pleasant average temperature of 21°C (70°F), making it an ideal destination for travelers. The maximum can reach a scorching 36°C (98°F), while the minimum can drop to a cool 11°C (52°F), so it's wise to pack accordingly for a comfortable trip.

June Weather in Diamond Bar: Daily Temperature Highs, Lows, and Averages

The chart illustrates June temperature patterns in Diamond Bar, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Diamond Bar, June typically has an average temperature of 21°C (70°F), with highs reaching up to 36°C (98°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec545456626470767674686154
Data source: Temperature data for Diamond Bar 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.

June Precipitation in Diamond Bar

In Diamond Bar in June, the precipitation amount is 1 mm (0.0 in) during a span of 0 days.

June Precipitation Trends in Diamond Bar

The chart displays monthly precipitation patterns in Diamond Bar, 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 Diamond Bar, June typically receives around 1 mm (0.0 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec80707627171123122679
Data source: Precipitation data for June generated using information from the Copernicus Climate Change Service.
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June Humidity in Diamond Bar

In Diamond Bar in June, humidity is 72%. With an average temperature of 21°C (70°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities a bit sticky and sweaty, but still manageable for traveling if you stay hydrated and take regular breaks in the shade.

June Average Humidity in Diamond Bar

This chart illustrates the average monthly humidity levels in Diamond Bar, 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 Diamond Bar is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%79%75%71%70%72%73%69%68%67%68%71%
Data source: Humidity data for June generated using information from the Copernicus Climate Change Service.

June UV Index in Diamond Bar

In Diamond Bar 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 Diamond Bar.

Maximum UV Index Levels in Diamond Bar for June

The chart shows the monthly maximum UV Index (UVI) for Diamond Bar 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 Diamond Bar typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101012111010754
Data source: Diamond Bar 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 Diamond Bar Compares to Other Months

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

This table compares monthly weather conditions in Diamond Bar, showing how June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather12°C (54°F)80 mm (3.1 inches)74%moderate
February Weather12°C (55°F)70 mm (2.8 inches)79%high
March Weather14°C (57°F)76 mm (3.0 inches)75%very high
April Weather16°C (62°F)27 mm (1.1 inches)70%very high
May Weather18°C (64°F)17 mm (0.7 inches)70%very high
June Weather21°C (70°F)1 mm (0.0 inches)72%extreme
July Weather24°C (76°F)1 mm (0.1 inches)73%extreme
August Weather25°C (77°F)2 mm (0.1 inches)69%very high
September Weather23°C (74°F)3 mm (0.1 inches)68%very high
October Weather20°C (68°F)12 mm (0.5 inches)67%high
November Weather16°C (61°F)26 mm (1.0 inches)68%moderate
December Weather12°C (54°F)79 mm (3.1 inches)71%moderate

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