August weather forecast
Gilroy, CA

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A colorful sunset sky over the hilly region of Gilroy in California
A colorful sunset sky over the hilly region of Gilroy in California

Weather in August

The last month of the summer, August, is another warm month in Gilroy, California, with temperature in the range of an average high of 85.1°F (29.5°C) and an average low of 54.1°F (12.3°C).

Temperature

Gilroy notes the warmest temperatures in August, with a high average of 85.1°F (29.5°C) and a low of 54.1°F (12.3°C).

Heat index

The heat index value for August is computed to be a tropical 89.6°F (32°C). Continuous exposure and activity could induce a sense of tiredness and subsequently, heat cramps.
Given the heat index, its values are aligned with shaded sites and gentle winds. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', melds the effects of warmth and moisture to generate a feeling of heat. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.

Humidity

In Gilroy, the average relative humidity in August is 60%.

Rainfall

In Gilroy, rain does not fall in June through August.

Daylight

The average length of the day in August is 13h and 32min.
On the first day of the month, sunrise is at 6:12 am and sunset at 8:12 pm. On the last day of August, sunrise is at 6:36 am and sunset at 7:35 pm PDT.

Sunshine

In Gilroy, California, the average sunshine in August is 12h.

UV index

The months with the highest UV index in Gilroy are June through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A maximum UV index of 6 in August translates into the following recommendations:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
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Frequently asked questions

What is the warmest month in Gilroy?

The month of August, characterized by an average high of 85.1°F (29.5°C) and a low of 54.1°F (12.3°C), is recognized as the warmest in Gilroy, California.

How hot does it get in Gilroy in August?

In August, the average high-temperature and low-temperature in Gilroy are 85.1°F (29.5°C) and 54.1°F (12.3°C) respectively. The average heat index (a.k.a. 'real feel', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in August is computed to be 89.6°F (32°C).

What is the average humidity in August in Gilroy?

In August, the average relative humidity in Gilroy is 60%.

What is the driest month in Gilroy?

In Gilroy, rain does not fall in June through August.

Does it rain in Gilroy in August?

In Gilroy, California, in August, it doesn't rain. In September, it rains.

How many hours of daylight does Gilroy have in August?

The average day length in August in Gilroy, California, is 13h and 32min.

When are sunrise and sunset in August in Gilroy?

In August, on the first day of the month, sunrise is at 6:12 am and sunset at 8:12 pm. On the last day of the month, in Gilroy, sunrise is at 6:36 am and sunset at 7:35 pm PDT.

How many hours of sunshine does Gilroy have in August?

In August, the average sunshine duration is 12h.

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

The months with the highest UV index in Gilroy are June through August, with an average maximum UV index of 6.

What is the UV index intensity in August in Gilroy?

In August, the average daily maximum UV index in Gilroy is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Gilroy, CA

Average temperature in August - Gilroy, CA
  • Average high temperature in August: 85.1°F

The warmest month (with the highest average high temperature) is August (85.1°F).
The month with the lowest average high temperature is December (57.6°F).

  • Average low temperature in August: 54.1°F

The months with the highest average low temperature are August and September (54.1°F).
The coldest months (with the lowest average low temperature) are February and March (40.6°F).

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Average pressure in August
Gilroy, CA

Average pressure in August - Gilroy, CA
  • Average pressure in August: 29.92"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).

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Average wind speed in August
Gilroy, CA

Average wind speed in August - Gilroy, CA
  • Average wind speed in August: 4.3mph

The windiest month (with the highest average wind speed) is May (5.3mph).
The calmest month (with the lowest average wind speed) is November (3.9mph).

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Average humidity in August
Gilroy, CA

Average humidity in August - Gilroy, CA
  • Average humidity in August: 60%

The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is September (57%).

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Average rainfall in August
Gilroy, CA

Average rainfall in August - Gilroy, CA
  • Average rainfall in August: 0"

The wettest month (with the highest rainfall) is December (0.83").
The driest months (with the least rainfall) are June, July and August (0").

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Average rainfall days in August
Gilroy, CA

Average rainfall days in August - Gilroy, CA
  • Average rainfall days in August: 0.6 days

The month with the highest number of rainy days is March (8.3 days).
The month with the least rainy days is August (0.6 days).

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

Average daylight in August / Average sunshine in August - Gilroy, CA
  • Average daylight in August: 13h and 3min

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 42min).

  • Average sunshine in August: 12h and 0min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

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Average sunshine days in August
Gilroy, CA

Average sunshine days in August - Gilroy, CA
  • Average sunshine days in August: 29.7 days

The month with the most sunshine days is July (29.9 days).
The month with the least sunshine days is March (21.4 days).

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Average UV index in August
Gilroy, CA

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

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in August
Gilroy, CA

Average cloud cover in August - Gilroy, 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
Gilroy, CA

Average visibility in August - Gilroy, 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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Gilroy, California, USA

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