August weather forecast and climate
Cupertino, CA

Weather in August

August, the last month of the summer, in Cupertino, is another warm month, with average temperature fluctuating between 79.2°F (26.2°C) and 56.1°F (13.4°C).

Temperature

In Cupertino, the average high-temperature in August is relatively the same as in July - a still warm 79.2°F (26.2°C). In Cupertino, in August, the average low-temperature is 56.1°F (13.4°C).

Humidity

In Cupertino, the average relative humidity is 66%.

Rainfall

Months with the least rainfall in Cupertino are July and August Rain falls for 0.8 days and accumulates 0.04" (1mm) of rain.

Daylight

In August, the average length of the day is 13.5h.

Sunshine

July and August, with an average of 12h of sunshine, are months with the most sunshine in Cupertino, California.

UV index

The average daily maximum UV index in Cupertino is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV radiation for average individuals.
Note: In August, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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 average humidity in August in Cupertino?

In Cupertino, the average relative humidity in August is 66%.

What is the driest month in Cupertino?

Months with the least rainfall in Cupertino, California, are July and August Rain falls for 0.8 days and accumulates 0.04" (1mm) of rain.

How much does it rain in Cupertino in August?

In August, the rain falls for 0.8 days. Throughout August, 0.04" (1mm) of precipitation is accumulated.

How many hours of daylight does Cupertino have in August?

In August, the average length of the day in Cupertino, California, is 13.5h.

What are the months with the most sunshine in Cupertino?

July and August, with an average of 12h of sunshine, are months with the most sunshine.

How many hours of sunshine does Cupertino have in August?

The average sunshine in August in Cupertino is 12h.

What is the UV index intensity in August in Cupertino?

In Cupertino, the average daily maximum UV index in August is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV rays.

Average temperature in August
Cupertino, CA

Average temperature in August - Cupertino, CA
  • Average high temperature in August: 79.2°F

The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is December (57°F).

  • Average low temperature in August: 56.1°F

The month with the highest average low temperature is August (56.1°F).
The coldest months (with the lowest average low temperature) are February and March (44.2°F).

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Average pressure in August
Cupertino, CA

Average pressure in August - Cupertino, CA
  • Average pressure in August: 29.93"

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is September (29.92").

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Average wind speed in August
Cupertino, CA

Average wind speed in August - Cupertino, CA
  • Average wind speed in August: 4.7mph

The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest month (with the lowest average wind speed) is September (4.6mph).

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Average humidity in August
Cupertino, CA

Average humidity in August - Cupertino, CA
  • Average humidity in August: 66%

The month with the highest relative humidity is March (74%).
Months with the lowest relative humidity are July, September and October (64%).

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Average rainfall in August
Cupertino, CA

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

The wettest month (with the highest rainfall) is February (1.02").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in August
Cupertino, CA

Average rainfall days in August - Cupertino, CA
  • Average rainfall days in August: 0.8 days

The month with the highest number of rainy days is March (9 days).
The month with the least rainy days is August (0.8 days).

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

Average daylight in August / Average sunshine in August - Cupertino, CA
  • Average daylight in August: 13.5h

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

Months with the most sunshine are July and August (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 5.9h).

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Average sunshine days in August
Cupertino, CA

Average sunshine days in August - Cupertino, CA
  • Average sunshine days in August: 28.5 days

The month with the most sunshine days is August (28.5 days).
Months with the least sunshine days are February and March (20.8 days).

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Average UV index in August
Cupertino, CA

Average UV index in August - Cupertino, 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
Cupertino, CA

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

The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 7).

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Average visibility in August
Cupertino, CA

Average visibility in August - Cupertino, 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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