August weather forecast and climate
Hayward, CA

The landscape of the famed Verdant Hills in Hayward, California
The landscape of the famed Verdant Hills in Hayward, California

Weather in August

August, the last month of the summer, in Hayward, is also a moderately hot month, with temperature in the range of an average low of 56.5°F (13.6°C) and an average high of 79.7°F (26.5°C).

Temperature

In August, the average high-temperature is almost the same as in July - a still warm 79.7°F (26.5°C). In Hayward, California, the average low-temperature is 56.5°F (13.6°C).

Humidity

The average relative humidity in Hayward is 65%.

Rainfall

Months with the least rainfall are July and August Rain falls for 0.9 days and accumulates 0.04" (1mm) of rain.

Daylight

In August, the average length of the day in Hayward is 13.6h.

Sunshine

The average sunshine is 12h.

UV index

In Hayward, California, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from the exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 5 in August transform into the following instructions:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in August in Hayward?

In Hayward, California, in August, the average high-temperature is 79.7°F (26.5°C), and the average low-temperature is 56.5°F (13.6°C).

What is the average humidity in August in Hayward?

In Hayward, the average relative humidity in August is 65%.

How much does it rain in Hayward in August?

In Hayward, California, during August, the rain falls for 0.9 days and regularly aggregates up to 0.04" (1mm) of precipitation.

What is the driest month in Hayward?

July and August are months with the least rain in Hayward, California, when the rain falls for 0.9 days and typically aggregates up to 0.04" (1mm) of rain.

What is the average length of the day in August in Hayward?

The average length of the day in August in Hayward, California, is 13.6h.

How many hours of sunshine does Hayward have in August?

The average sunshine in August is 12h.

What is the UV index reading in August in Hayward?

In Hayward, the average daily maximum UV index in August is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health from the exposure to the Sun's UV radiation.

Average temperature in August
Hayward, CA

Average temperature in August - Hayward, CA
  • Average high temperature in August: 79.7°F

The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is December (55.9°F).

  • Average low temperature in August: 56.5°F

The month with the highest average low temperature is August (56.5°F).
The coldest months (with the lowest average low temperature) are January and December (43.7°F).

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Average pressure in August
Hayward, CA

Average pressure in August - Hayward, CA
  • Average pressure in August: 29.92"

The month with the highest atmospheric pressure is January (30.14").
Months with the lowest atmospheric pressure are June, August and September (29.92").

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Average wind speed in August
Hayward, CA

Average wind speed in August - Hayward, CA
  • Average wind speed in August: 5.4mph

The windiest month (with the highest average wind speed) is May (6.6mph).
The calmest month (with the lowest average wind speed) is November (4.6mph).

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Average humidity in August
Hayward, CA

Average humidity in August - Hayward, CA
  • Average humidity in August: 65%

The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is September (61%).

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Average rainfall in August
Hayward, CA

Average rainfall in August - Hayward, CA
  • Average rainfall in August: 0.04"

The wettest month (with the highest rainfall) is February (2.28").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in August
Hayward, CA

Average rainfall days in August - Hayward, CA
  • Average rainfall days in August: 0.9 days

The month with the highest number of rainy days is March (12.4 days).
The month with the least rainy days is August (0.9 days).

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Average daylight in August /
Average sunshine in August
Hayward, CA

Average daylight in August / Average sunshine in August - Hayward, CA
  • Average daylight in August: 13.6h

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in August: 12h

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 5.9h).

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Average sunshine days in August
Hayward, CA

Average sunshine days in August - Hayward, CA
  • Average sunshine days in August: 28.9 days

The month with the most sunshine days is August (28.9 days).
The month with the least sunshine days is March (17.3 days).

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Average UV index in August
Hayward, CA

Average UV index in August - Hayward, CA
  • Average UV index in August: 5

The month with the highest UV index is June (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in August
Hayward, CA

Average cloud cover in August - Hayward, CA
  • Average cloud cover in August: 8

Months with the most cloud cover are March and December (Cloud cover 34).
The month with the least cloud cover is July (Cloud cover 7).

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Average visibility in August
Hayward, CA

Average visibility in August - Hayward, CA
  • Average visibility in August: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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