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June Weather in Sunnyvale, United States

Last updated: June 24, 2025

In Sunnyvale, United States, the average temperature in June is a warm 27°C (82°F). Temperatures can range from a cool 15°C (60°F) to a sweltering 37°C (99°F). During this month, expect about 97 mm (3.8 in) of precipitation over 9 days, contributing to an average humidity of 78%. Enjoy the diverse climate while preparing for both warmth and occasional rain! 🌦️

June Temperature in Sunnyvale

In June in Sunnyvale, the average temperature is 27°C (82°F). Maximums can reach up to 37°C (99°F) and minimums can drop as low as 15°C (60°F). This makes it a great time for travelers to enjoy a mix of warm days and cooler evenings while exploring all that Sunnyvale has to offer.

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

The chart illustrates June temperature patterns in Sunnyvale, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sunnyvale, June typically has an average temperature of 27°C (82°F), with highs reaching up to 37°C (99°F) and lows dropping to around 15°C (60°F).
JanFebMarAprMayJunJulAugSepOctNovDec474960657481858479685752
Data source: Temperature data for Sunnyvale 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 Sunnyvale

In Sunnyvale in June, the total precipitation amount reaches 97 mm (3.8 in) over the course of 9 days.

June Precipitation Trends in Sunnyvale

The chart displays monthly precipitation patterns in Sunnyvale, 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 Sunnyvale, June typically receives around 97 mm (3.8 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec65111117138181975697861445574
Data source: Precipitation data for June generated using information from the Copernicus Climate Change Service.
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June Humidity in Sunnyvale

In Sunnyvale in June humidity is 78%. With an average temperature of 27°C (82°F), this humidity feels like a warm blanket enveloping you, making outdoor activities a sweaty affair and requiring frequent breaks for hydration.

June Average Humidity in Sunnyvale

This chart illustrates the average monthly humidity levels in Sunnyvale, 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 Sunnyvale is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%79%78%78%81%78%73%66%65%72%82%87%
Data source: Humidity data for June generated using information from the Copernicus Climate Change Service.

June UV Index in Sunnyvale

In Sunnyvale 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 Sunnyvale.

Maximum UV Index Levels in Sunnyvale for June

The chart shows the monthly maximum UV Index (UVI) for Sunnyvale 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 Sunnyvale typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec478101111111110864
Data source: Sunnyvale 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 Sunnyvale Compares to Other Months

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

This table compares monthly weather conditions in Sunnyvale, showing how June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)65 mm (2.6 inches)80%moderate
February Weather10°C (50°F)111 mm (4.4 inches)79%high
March Weather16°C (61°F)117 mm (4.6 inches)78%very high
April Weather18°C (65°F)138 mm (5.4 inches)78%very high
May Weather23°C (75°F)181 mm (7.1 inches)81%extreme
June Weather27°C (82°F)97 mm (3.8 inches)78%extreme
July Weather29°C (85°F)56 mm (2.2 inches)73%extreme
August Weather29°C (85°F)97 mm (3.8 inches)66%extreme
September Weather26°C (80°F)86 mm (3.4 inches)65%very high
October Weather20°C (68°F)144 mm (5.7 inches)72%very high
November Weather14°C (57°F)55 mm (2.2 inches)82%high
December Weather11°C (52°F)74 mm (2.9 inches)87%moderate

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