August weather forecast and climate
Glendora, CA

The beautiful city of Glendora, California, surrounded by the vast mountain ranges
The beautiful city of Glendora, California, surrounded by the vast mountain ranges

Weather in August

August, the last month of the summer, in Glendora, is another tropical month, with temperature in the range of an average high of 88.7°F (31.5°C) and an average low of 65.7°F (18.7°C).

Temperature

August is the warmest month, with an average high-temperature of 88.7°F (31.5°C) and an average low-temperature of 65.7°F (18.7°C).

Heat index

The average heat index in August is calculated to a hot 90.5°F (32.5°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values 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 a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional factors like wind, pregnancy, metabolic differences, and activity influence one's weather impression. 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

August and November, with an average relative humidity of 45%, are the least humid months in Glendora.

Rainfall

In Glendora, in August, during 1.6 rainfall days, 0.08" (2mm) of precipitation is typically accumulated. Throughout the year, in Glendora, there are 44.9 rainfall days, and 7.76" (197mm) of precipitation is accumulated.

Snowfall

January, March through December are months without snowfall in Glendora, California.

Daylight

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

Sunshine

The average sunshine in August is 12h.

UV index

July and August, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to the UV radiation for ordinary individuals.
Note: In August, the average maximum UV index of 7 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the warmest month in Glendora?

The warmest month in Glendora, California, is August, with an average high-temperature of 88.7°F (31.5°C) and an average low-temperature of 65.7°F (18.7°C).

What is the temperature in August in Glendora?

In August, in Glendora, the average high-temperature is 88.7°F (31.5°C), and the average low-temperature is 65.7°F (18.7°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), that combines relative humidity and air temperature, in August is appraised at 90.5°F (32.5°C).

What is the least humid month in Glendora?

August and November, with an average relative humidity of 45%, are the least humid months in Glendora.

What is the average humidity in August in Glendora?

The average relative humidity in August is 45%.

How much does it rain in Glendora in August?

In Glendora, California, during August, the rain falls for 1.6 days and regularly aggregates up to 0.08" (2mm) of precipitation.

When it does not snow in Glendora?

In Glendora, California, snow does not fall in January, March through December.

How many hours of daylight does Glendora have in August?

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

How many hours of sunshine does Glendora have in August?

The average sunshine in August in Glendora is 12h.

What is the month with the highest UV index in Glendora?

July and August, with an average maximum UV index of 7, are months with the highest UV index in Glendora, California.

What is the UV index intensity in August in Glendora?

In August, the average daily maximum UV index in Glendora is 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from the exposure to the Sun's UV rays.

Average temperature in August
Glendora, CA

Average temperature in August - Glendora, CA
  • Average high temperature in August: 88.7°F

The warmest month (with the highest average high temperature) is August (88.7°F).
The month with the lowest average high temperature is December (61.5°F).

  • Average low temperature in August: 65.7°F

The month with the highest average low temperature is August (65.7°F).
The coldest month (with the lowest average low temperature) is December (45.5°F).

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Average pressure in August
Glendora, CA

Average pressure in August - Glendora, CA
  • Average pressure in August: 29.88"

The month with the highest atmospheric pressure is January (30.11").
The month with the lowest atmospheric pressure is June (29.87").

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Average wind speed in August
Glendora, CA

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

The windiest months (with the highest average wind speed) are April and May (5.8mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).

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Average humidity in August
Glendora, CA

Average humidity in August - Glendora, CA
  • Average humidity in August: 45%

Months with the highest relative humidity are March and May (55%).
Months with the lowest relative humidity are August and November (45%).

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Average rainfall in August
Glendora, CA

Average rainfall in August - Glendora, CA
  • Average rainfall in August: 0.08"

The wettest month (with the highest rainfall) is February (1.73").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in August
Glendora, CA

Average rainfall days in August - Glendora, CA
  • Average rainfall days in August: 1.6 days

The month with the highest number of rainy days is March (7.2 days).
The month with the least rainy days is June (1.1 days).

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Average snowfall days in August
Glendora, CA

Average snowfall days in August - Glendora, CA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (0.1 days).
Months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

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

Average daylight in August / Average sunshine in August - Glendora, 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

Months with the most sunshine are June and July (Average sunshine: 12.1h).
The month with the least sunshine is February (Average sunshine: 6.9h).

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Average sunshine days in August
Glendora, CA

Average sunshine days in August - Glendora, CA
  • Average sunshine days in August: 27.8 days

The month with the most sunshine days is June (28.6 days).
The month with the least sunshine days is February (22.6 days).

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Average UV index in August
Glendora, CA

Average UV index in August - Glendora, CA
  • Average UV index in August: 7

Months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in August
Glendora, CA

Average cloud cover in August - Glendora, CA
  • Average cloud cover in August: 4

Months with the most cloud cover are March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 4).

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Average visibility in August
Glendora, CA

Average visibility in August - Glendora, 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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