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August Weather in Hayward, United States

Last updated: June 24, 2025

In August, the average temperature in Hayward, United States hovers around 20°C (68°F), with a minimum dipping to 8°C (47°F) and a maximum soaring to 32°C (90°F). Expect 113 mm (4.5 in) of precipitation spread over 11 days, accompanied by an average humidity of 78%. 🌦️

August Temperature in Hayward

In August in Hayward, the average temperature is 20°C (68°F). Maximums can reach 32°C (90°F) while minimums can drop to as low as 8°C (47°F). This makes Hayward a favorable destination for travelers seeking mild weather with the potential for warmer days.

August Weather in Hayward: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Hayward, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hayward, August typically has an average temperature of 20°C (68°F), with highs reaching up to 32°C (90°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec141429405667716761463021
Data source: Temperature data for Hayward 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.

August Precipitation in Hayward

In Hayward in August, the total precipitation amount is 113 mm (4.5 in), spread over a period of 11 days.

August Precipitation Trends in Hayward

The chart displays monthly precipitation patterns in Hayward, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Hayward, August typically receives around 113 mm (4.5 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec2640498810494100113104944661
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

August Humidity in Hayward

In Hayward in August humidity is 78%. With an average temperature of 20°C (68°F), this humidity feels like a warm, enveloping blanket that makes exploring the sights a bit sticky, so travelers should stay hydrated and take frequent breaks in the shade.

August Average Humidity in Hayward

This chart illustrates the average monthly humidity levels in Hayward, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Hayward is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%89%86%85%79%80%80%78%80%84%89%85%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Hayward

In Hayward in August, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Hayward.

Maximum UV Index Levels in Hayward for August

The chart shows the monthly maximum UV Index (UVI) for Hayward in August, 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 August, the maximum UV index in Hayward typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910987532
Data source: Hayward August 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 August Weather in Hayward Compares to Other Months

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

This table compares monthly weather conditions in Hayward, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-10°C (14°F)26 mm (1.0 inches)88%low
February Weather-10°C (15°F)40 mm (1.6 inches)89%moderate
March Weather-2°C (29°F)49 mm (1.9 inches)86%moderate
April Weather4°C (40°F)88 mm (3.5 inches)85%high
May Weather13°C (56°F)104 mm (4.1 inches)79%very high
June Weather19°C (67°F)94 mm (3.7 inches)80%very high
July Weather22°C (71°F)100 mm (3.9 inches)80%very high
August Weather20°C (68°F)113 mm (4.5 inches)78%very high
September Weather16°C (61°F)104 mm (4.1 inches)80%high
October Weather8°C (46°F)94 mm (3.7 inches)84%moderate
November Weather-1°C (31°F)46 mm (1.8 inches)89%moderate
December Weather-6°C (21°F)61 mm (2.4 inches)85%low

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