August weather forecast
Cupertino, CA

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Weather in August

The last month of the summer, August, is also a moderately hot month in Cupertino, California, with an average temperature fluctuating between 79.2°F (26.2°C) and 56.1°F (13.4°C).

Temperature

The commencement of August introduces an average high-temperature of a still warm 79.2°F (26.2°C), closely mirroring the preceding month. Cupertino documents a significant temperature variance in August, with the mean nighttime lows settling at a mild 56.1°F (13.4°C).

Humidity

The average relative humidity in August is 66%.

Rainfall

July and August are months with the least rain when the rain falls for 0.8 days and typically aggregates up to 0.04" (1mm) of rain.

Daylight

The average length of the day in August in Cupertino is 13h and 33min.
On the first day of the month, sunrise is at 6:13 am and sunset at 8:15 pm. On the last day of August, sunrise is at 6:38 am and sunset at 7:37 pm PDT.

Sunshine

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

UV index

In August, the average daily maximum UV index in Cupertino is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: The daily high UV index of 5 in August translates into this advice:
Take necessary precautions - Suggestions to elude sunburn are provided. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
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Frequently asked questions

What is the average August temperature in Cupertino?

The high-temperature, in August, in Cupertino, is 79.2°F (26.2°C), while the low-temperature averages to 56.1°F (13.4°C).

What is the average humidity in August in Cupertino?

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

What is the driest month in Cupertino?

July and August are months with the least rain when the rain falls for 0.8 days and typically aggregates up to 0.04" (1mm) of rain.

How much does it rain in Cupertino in August?

In Cupertino, California, during August, the rain falls for 0.8 days and regularly aggregates up to 0.04" (1mm) of precipitation.

How many hours of daylight does Cupertino have in August?

The average day length in August in Cupertino is 13h and 33min.

When is the sunrise / sunset in August in Cupertino?

On the first day of August, sunrise is at 6:13 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 7:37 pm PDT.

What is the month with the most sunshine in Cupertino?

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

How long on average sun shines in August in Cupertino?

In August, the average sunshine duration in Cupertino, California, is 12h.

What is the UV index reading in August in Cupertino?

In August, the average daily maximum UV index in Cupertino is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

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"Hg

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

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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%).
The 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: 13h and 3min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in August: 12h and 0min

The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).

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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).
The 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).
The 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

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

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Cupertino, California, USA

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