August weather forecast
Willowbrook, CA

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Weather in August

August, the last month of the summer in Willowbrook, is another warm month, with temperature in the range of an average low of 65.1°F (18.4°C) and an average high of 81.1°F (27.3°C).

Temperature

August, with its high-temperature average of 81.1°F (27.3°C) and a low-temperature average of 65.1°F (18.4°C), is the warmest month.

Heat index

The average heat index in August is estimated at 84.2°F (29°C). Continued exposure and engagement in activity might trigger tiredness and subsequently heat cramps.
Understanding the heat index involves considering values for shaded locales with light wind. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'feels like' or 'apparent temperature', integrates the air's temperature and its humidity to showcase the felt temperature by people. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.

Humidity

In August, the average relative humidity is 63%.

Rainfall

In Willowbrook, in August, during 2.2 rainfall days, 0.16" (4mm) of precipitation is typically accumulated. In Willowbrook, during the entire year, the rain falls for 49.7 days and collects up to 6.77" (172mm) of precipitation.

Daylight

In Willowbrook, the average length of the day in August is 13h and 23min.
On the first day of August, sunrise is at 6:05 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 6:26 am and sunset at 7:19 pm PDT.

Sunshine

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

UV index

The months with the highest UV index are June through September, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 6 during August leads to these instructions:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the hottest in Willowbrook?

August, recording an average high temperature of 81.1°F (27.3°C) and a low temperature of 65.1°F (18.4°C), is Willowbrook's warmest month.

What is the temperature in August in Willowbrook?

In Willowbrook, in August, the average high-temperature is 81.1°F (27.3°C), and the average low-temperature is 65.1°F (18.4°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in August is estimated at 84.2°F (29°C).

What is the average humidity in August in Willowbrook?

The average relative humidity in August in Willowbrook, California, is 63%.

How much does it rain in Willowbrook in August?

In Willowbrook, in August, during 2.2 rainfall days, 0.16" (4mm) of precipitation is typically accumulated.

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

The average day length in August in Willowbrook, California, is 13h and 23min.

When is the sunrise / sunset in August in Willowbrook?

In August, on the first day of the month, sunrise is at 6:05 am and sunset at 7:53 pm. On the last day of the month, in Willowbrook, sunrise is at 6:26 am and sunset at 7:19 pm PDT.

What are the months with the most sunshine in Willowbrook?

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

How many hours of sunshine does Willowbrook have in August?

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

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

June through September, with an average maximum UV index of 6, are months with the highest UV index in Willowbrook.

What is the UV index reading in August in Willowbrook?

In Willowbrook, California, the average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high health vulnerability 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
Willowbrook, CA

Average temperature in August - Willowbrook, CA
  • Average high temperature in August: 81.1°F

The warmest month (with the highest average high temperature) is August (81.1°F).
The month with the lowest average high temperature is December (64°F).

  • Average low temperature in August: 65.1°F

The month with the highest average low temperature is August (65.1°F).
The coldest month (with the lowest average low temperature) is February (51.4°F).

Average pressure in August
Willowbrook, CA

Average pressure in August - Willowbrook, CA
  • Average pressure in August: 29.9"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.89"Hg).

Average wind speed in August
Willowbrook, CA

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

The windiest month (with the highest average wind speed) is April (6.3mph).
The calmest months (with the lowest average wind speed) are September and October (4.8mph).

Average humidity in August
Willowbrook, CA

Average humidity in August - Willowbrook, CA
  • Average humidity in August: 63%

The month with the highest relative humidity is June (69%).
The month with the lowest relative humidity is November (53%).

Average rainfall in August
Willowbrook, CA

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

The wettest months (with the highest rainfall) are January and February (1.26").
The driest month (with the least rainfall) is June (0.08").

Average rainfall days in August
Willowbrook, CA

Average rainfall days in August - Willowbrook, CA
  • Average rainfall days in August: 2.2 days

The month with the highest number of rainy days is March (7 days).
The month with the least rainy days is June (1.3 days).

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

Average daylight in August / Average sunshine in August - Willowbrook, CA
  • Average daylight in August: 13h and 2min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • 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: 6h and 42min).

Average sunshine days in August
Willowbrook, CA

Average sunshine days in August - Willowbrook, CA
  • Average sunshine days in August: 25.3 days

The month with the most sunshine days is August (25.3 days).
The month with the least sunshine days is February (21.1 days).

Average UV index in August
Willowbrook, CA

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

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

Average cloud cover in August
Willowbrook, CA

Average cloud cover in August - Willowbrook, CA
  • Average cloud cover in August: 6

The months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 6).

Average visibility in August
Willowbrook, CA

Average visibility in August - Willowbrook, 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).

Willowbrook, California, USA

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