August weather forecast
Los Altos, CA

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Weather in August

August, the last month of the summer in Los Altos, is another warm month, with an average temperature fluctuating between 56.8°F (13.8°C) and 79.3°F (26.3°C).

Temperature

The shift into August finds Los Altos at an average high-temperature of a still moderately hot 79.3°F (26.3°C), closely comparable to July's conditions. Despite a significant deviation from daily highs, August sees an average nighttime temperature of 56.8°F (13.8°C).

Humidity

The average relative humidity in August in Los Altos, California, is 65%.

Rainfall

June through August are months with the least rain when the rain falls for 0.4 days and typically aggregates up to 0.04" (1mm) of rain.

Daylight

The average length of the day in August in Los Altos is 13h and 33min.
On the first day of August in Los Altos, 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 7:38 pm PDT.

Sunshine

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

UV index

The average daily maximum UV index in August in Los Altos is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: The UV index of 5 during August translates into the following guidance:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
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Frequently asked questions

What is the usual temperature for Los Altos in August?

In Los Altos, in August, the average high-temperature is 79.3°F (26.3°C), and the average low-temperature is 56.8°F (13.8°C).

What is the average humidity in August in Los Altos?

The average relative humidity in August in Los Altos is 65%.

What is the driest month in Los Altos?

The months with the least rainfall in Los Altos, California, are June through August Rain falls for 0.4 days and accumulates 0.04" (1mm) of rain.

How many days does it rain in August in Los Altos?

In Los Altos, California, in August, it is raining for 0.4 days, with typically 0.04" (1mm) of accumulated precipitation.

What is the average length of the day in August in Los Altos?

In August, the average day length is 13h and 33min.

When is the sunrise / sunset in August in Los Altos?

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

What is the month with the most sunshine in Los Altos?

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

How long on average sun shines in August in Los Altos?

In Los Altos, the average sunshine duration in August is 12h.

What is the UV index reading in August in Los Altos?

In Los Altos, the average daily maximum UV index in August is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Los Altos, CA

Average temperature in August - Los Altos, CA
  • Average high temperature in August: 79.3°F

The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is December (56.5°F).

  • Average low temperature in August: 56.8°F

The month with the highest average low temperature is August (56.8°F).
The coldest month (with the lowest average low temperature) is December (44.1°F).

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Average pressure in August
Los Altos, CA

Average pressure in August - Los Altos, CA
  • Average pressure in August: 29.93"Hg

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

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Average wind speed in August
Los Altos, CA

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

The windiest months (with the highest average wind speed) are April and May (6.2mph).
The calmest months (with the lowest average wind speed) are August, September, October and November (4.7mph).

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Average humidity in August
Los Altos, CA

Average humidity in August - Los Altos, CA
  • Average humidity in August: 65%

The month with the highest relative humidity is March (73%).
The months with the lowest relative humidity are July, September and October (63%).

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Average rainfall in August
Los Altos, CA

Average rainfall in August - Los Altos, CA
  • Average rainfall in August: 0.04"

The wettest months (with the highest rainfall) are February, March and December (0.83").
The driest months (with the least rainfall) are June, July and August (0.04").

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Average rainfall days in August
Los Altos, CA

Average rainfall days in August - Los Altos, CA
  • Average rainfall days in August: 0.4 days

The month with the highest number of rainy days is March (10 days).
The month with the least rainy days is August (0.4 days).

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Average daylight in August /
Average sunshine in August
Los Altos, CA

Average daylight in August / Average sunshine in August - Los Altos, CA
  • Average daylight in August: 13h and 4min

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
Los Altos, CA

Average sunshine days in August - Los Altos, CA
  • Average sunshine days in August: 29.8 days

The months with the most sunshine days are July and August (29.8 days).
The month with the least sunshine days is March (19.4 days).

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Average UV index in August
Los Altos, CA

Average UV index in August - Los Altos, 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 February, November and December (UV index 3).

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Average cloud cover in August
Los Altos, CA

Average cloud cover in August - Los Altos, 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
Los Altos, CA

Average visibility in August - Los Altos, 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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Los Altos, California, USA

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