August weather forecast and climate
Rowland Heights, CA

Weather in August

August, the last month of the summer, in Rowland Heights, is also a hot month, with average temperature fluctuating between 88.3°F (31.3°C) and 66.2°F (19°C).

Temperature

With an average high-temperature of 88.3°F (31.3°C) and an average low-temperature of 66.2°F (19°C), August is the warmest month.

Heat index

The average heat index is evaluated at a hot 91.9°F (33.3°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'real feel', 'felt air temperature', or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (wind, metabolic differences, clothing). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In August, the average relative humidity in Rowland Heights is 51%.

Rainfall

Months with the least rainfall in Rowland Heights are June and August Rain falls for 1.2 days and accumulates 0.04" (1mm) of rain.

Daylight

The average length of the day is 13.4h.

Sunshine

In August, the average sunshine is 12h.

UV index

With an average maximum UV index of 7, August is the month with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to the UV radiation for ordinary individuals.
Note: The daily maximum UV index of 7 interpret into the following advice:
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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the warmest month in Rowland Heights?

The warmest month in Rowland Heights, California, is August, with an average high-temperature of 88.3°F (31.3°C) and an average low-temperature of 66.2°F (19°C).

What is the temperature in August in Rowland Heights?

In August, the average high-temperature is 88.3°F (31.3°C), and the average low-temperature is 66.2°F (19°C). In August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), that combines both air temperature and relative humidity, is appraised at 91.9°F (33.3°C).

What is the average humidity in August in Rowland Heights?

In August, the average relative humidity in Rowland Heights is 51%.

How much does it rain in Rowland Heights in August?

In Rowland Heights, California, in August, during 1.2 rainfall days, 0.04" (1mm) of precipitation is typically accumulated.

What is the driest month in Rowland Heights?

Months with the least rainfall in Rowland Heights are June and August Rain falls for 1.2 days and accumulates 0.04" (1mm) of rain.

What is the average length of the day in August in Rowland Heights?

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

How long on average sun shines in August in Rowland Heights?

In August, the average sunshine in Rowland Heights is 12h.

What is the month with the highest UV index in Rowland Heights?

The month with the highest UV index in Rowland Heights is August, with an average maximum UV index of 7.

How high is the UV index in August in Rowland Heights?

In August, the average daily maximum UV index in Rowland Heights is 7. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to the Sun's UV rays.

Average temperature in August
Rowland Heights, CA

Average temperature in August - Rowland Heights, CA
  • Average high temperature in August: 88.3°F

The warmest month (with the highest average high temperature) is August (88.3°F).
The month with the lowest average high temperature is December (64.9°F).

  • Average low temperature in August: 66.2°F

The month with the highest average low temperature is August (66.2°F).
The coldest month (with the lowest average low temperature) is February (48.9°F).

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Average pressure in August
Rowland Heights, CA

Average pressure in August - Rowland Heights, CA
  • Average pressure in August: 29.89"

The month with the highest atmospheric pressure is January (30.1").
The month with the lowest atmospheric pressure is June (29.88").

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Average wind speed in August
Rowland Heights, CA

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

The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is September (4.6mph).

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Average humidity in August
Rowland Heights, CA

Average humidity in August - Rowland Heights, CA
  • Average humidity in August: 51%

The month with the highest relative humidity is June (59%).
The month with the lowest relative humidity is November (46%).

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Average rainfall in August
Rowland Heights, CA

Average rainfall in August - Rowland Heights, CA
  • Average rainfall in August: 0.04"

The wettest month (with the highest rainfall) is December (1.61").
The driest months (with the least rainfall) are June and August (0.04").

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Average rainfall days in August
Rowland Heights, CA

Average rainfall days in August - Rowland Heights, CA
  • Average rainfall days in August: 1.2 days

The month with the highest number of rainy days is March (6.6 days).
The month with the least rainy days is June (1.1 days).

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Average daylight in August /
Average sunshine in August
Rowland Heights, CA

Average daylight in August / Average sunshine in August - Rowland Heights, 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: 12h

The month with the most sunshine is July (Average sunshine: 12.1h).
Months with the least sunshine are February and December (Average sunshine: 6.8).

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Average sunshine days in August
Rowland Heights, CA

Average sunshine days in August - Rowland Heights, CA
  • Average sunshine days in August: 28.2 days

The month with the most sunshine days is August (28.2 days).
The month with the least sunshine days is February (21.6 days).

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Average UV index in August
Rowland Heights, CA

Average UV index in August - Rowland Heights, CA
  • Average UV index in August: 7

The month with the highest UV index is August (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 4).

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Average cloud cover in August
Rowland Heights, CA

Average cloud cover in August - Rowland Heights, CA
  • Average cloud cover in August: 5

Months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in August
Rowland Heights, CA

Average visibility in August - Rowland Heights, 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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