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June Weather in Walnut Creek, United States

Last updated: June 24, 2025

In Walnut Creek, United States, the average temperature in June hovers around 20°C (68°F). Expect a minimum of 10°C (50°F) and a potential maximum of 39°C (103°F). With an average humidity of 64%, you’ll find it quite comfortable, and with only 1 mm (0.1 in) of precipitation expected over 0 days, it's perfect weather for outdoor activities!

June Temperature in Walnut Creek

In June in Walnut Creek, the average temperature is 20°C (68°F). Maximums can reach 39°C (103°F) and minimums can be as low as 10°C (50°F). Travelers should prepare for warm days and cooler nights while enjoying their time in Walnut Creek.

June Weather in Walnut Creek: Daily Temperature Highs, Lows, and Averages

The chart illustrates June temperature patterns in Walnut Creek, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Walnut Creek, June typically has an average temperature of 20°C (68°F), with highs reaching up to 39°C (103°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec505255596368686968645650
Data source: Temperature data for Walnut Creek 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 Walnut Creek

In Walnut Creek in June, the precipitation amount is 1 mm (0.1 in) during 0 days, indicating a very dry period.

June Precipitation Trends in Walnut Creek

The chart displays monthly precipitation patterns in Walnut Creek, 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 Walnut Creek, June typically receives around 1 mm (0.1 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec99897231161001233775
Data source: Precipitation data for June generated using information from the Copernicus Climate Change Service.
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June Humidity in Walnut Creek

In Walnut Creek in June humidity is 64%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace, making it a perfect time for travelers to explore, though they might want to stay hydrated and take breaks in the shade to fully enjoy the experience.

June Average Humidity in Walnut Creek

This chart illustrates the average monthly humidity levels in Walnut Creek, 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 Walnut Creek is approximately 64%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%84%82%78%71%64%59%54%55%62%78%80%
Data source: Humidity data for June generated using information from the Copernicus Climate Change Service.

June UV Index in Walnut Creek

In Walnut Creek in June, 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 Walnut Creek.

Maximum UV Index Levels in Walnut Creek for June

The chart shows the monthly maximum UV Index (UVI) for Walnut Creek 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 Walnut Creek typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3589101111109643
Data source: Walnut Creek 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 Walnut Creek Compares to Other Months

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

This table compares monthly weather conditions in Walnut Creek, showing how June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (50°F)99 mm (3.9 inches)82%moderate
February Weather11°C (53°F)89 mm (3.5 inches)84%moderate
March Weather13°C (55°F)72 mm (2.8 inches)82%very high
April Weather15°C (59°F)31 mm (1.2 inches)78%very high
May Weather17°C (63°F)16 mm (0.6 inches)71%very high
June Weather20°C (68°F)1 mm (0.1 inches)64%extreme
July Weather20°C (68°F)0 mm (0.0 inches)58%extreme
August Weather20°C (69°F)0 mm (0.0 inches)54%very high
September Weather20°C (69°F)1 mm (0.0 inches)55%very high
October Weather18°C (64°F)23 mm (0.9 inches)62%high
November Weather13°C (56°F)37 mm (1.5 inches)78%moderate
December Weather10°C (50°F)75 mm (2.9 inches)80%moderate

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