August weather forecast and climate
Westmont, CA

Weather in August

August, the last month of the summer, in Westmont, is another warm month, with average temperature ranging between min 64.9°F (18.3°C) and max 80.2°F (26.8°C).

Temperature

August is the warmest month, with an average high-temperature of 80.2°F (26.8°C) and an average low-temperature of 64.9°F (18.3°C).

Humidity

The average relative humidity in August is 65%.

Rainfall

In August, the rain falls for 2.5 days. Throughout August, 0.16" (4mm) of precipitation is accumulated. Throughout the year, in Westmont, there are 47.6 rainfall days, and 7.24" (184mm) of precipitation is accumulated.

Daylight

In August, the average length of the day is 13.4h.

Sunshine

Months with the most sunshine are July and August, with an average of 11.9h of sunshine.

UV index

Months with the highest UV index are June through September, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from the exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 6 in August transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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 warmest month in Westmont?

The warmest month is August, with an average high-temperature of 80.2°F (26.8°C) and an average low-temperature of 64.9°F (18.3°C).

What is the temperature in August in Westmont?

The average high-temperature, in August, in Westmont, California, is 80.2°F (26.8°C), while the average low-temperature is 64.9°F (18.3°C).

What is the average humidity in August in Westmont?

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

How many days does it rain in August in Westmont?

In Westmont, California, in August, during 2.5 rainfall days, 0.16" (4mm) of precipitation is typically accumulated.

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

In August, the average length of the day is 13.4h.

What are the months with the most sunshine in Westmont?

Months with the most sunshine in Westmont are July and August, with an average of 11.9h of sunshine.

How many hours of sunshine does Westmont have in August?

In Westmont, California, the average sunshine in August is 11.9h.

What are the months with the highest UV index in Westmont?

Months with the highest UV index in Westmont, California, are June through September, with an average maximum UV index of 6.

What is the UV index intensity in August in Westmont?

In August, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health threat from unprotected exposure to the UV radiation.

Average temperature in August
Westmont, CA

Average temperature in August - Westmont, CA
  • Average high temperature in August: 80.2°F

The warmest month (with the highest average high temperature) is August (80.2°F).
The month with the lowest average high temperature is December (64°F).

  • Average low temperature in August: 64.9°F

The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (51.1°F).

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Average pressure in August
Westmont, CA

Average pressure in August - Westmont, CA
  • Average pressure in August: 29.9"

The month with the highest atmospheric pressure is January (30.1").
The month with the lowest atmospheric pressure is June (29.89").

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Average wind speed in August
Westmont, CA

Average wind speed in August - Westmont, CA
  • Average wind speed in August: 5mph

The windiest month (with the highest average wind speed) is April (6.4mph).
The calmest month (with the lowest average wind speed) is September (4.9mph).

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Average humidity in August
Westmont, CA

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

The month with the highest relative humidity is June (70%).
The month with the lowest relative humidity is November (54%).

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Average rainfall in August
Westmont, CA

Average rainfall in August - Westmont, CA
  • Average rainfall in August: 0.16"

The wettest month (with the highest rainfall) is January (1.42").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days in August
Westmont, CA

Average rainfall days in August - Westmont, CA
  • Average rainfall days in August: 2.5 days

The month with the highest number of rainy days is March (6.5 days).
The month with the least rainy days is June (1.7 days).

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

Average daylight in August / Average sunshine in August - Westmont, CA
  • Average daylight in August: 13.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in August: 11.9h

Months with the most sunshine are July and August (Average sunshine: 11.9h).
The month with the least sunshine is December (Average sunshine: 6.7h).

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Average sunshine days in August
Westmont, CA

Average sunshine days in August - Westmont, CA
  • Average sunshine days in August: 25.4 days

The month with the most sunshine days is October (25.5 days).
The month with the least sunshine days is June (21.4 days).

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Average UV index in August
Westmont, CA

Average UV index in August - Westmont, CA
  • Average UV index in August: 6

Months with the highest UV index are June, July, August and September (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 4).

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Average cloud cover in August
Westmont, CA

Average cloud cover in August - Westmont, CA
  • Average cloud cover in August: 7

Months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 7).

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Average visibility in August
Westmont, CA

Average visibility in August - Westmont, 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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