Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
The start of August sees the average high-temperature at a still moderately hot 85.1°F (29.5°C), showing little difference from July's 85.6°F (29.8°C). In August, a remarkable difference from daytime highs is noted, as Clayton records an average temperature of 57.4°F (14.1°C) during the night.Heat index
Throughout August, the heat index is estimated at a hot 89.6°F (32°C). Long-standing exposure coupled with ongoing activity could result in exhaustion, possibly causing heat cramps.It is emphasized that the heat index's values are meant for shaded zones with mild winds. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'feels like', binds temperature metrics with humidity values to give a sense of the actual warmth. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
Humidity
In August, the average relative humidity is 58%.Rainfall
July and August are months with the least rain in Clayton when the rain falls for 0.8 days and typically aggregates up to 0.04" (1mm) of rain.Daylight
The average length of the day in August in Clayton, California, is 13h and 35min.On the first day of the month, sunrise is at 6:11 am and sunset at 8:16 pm. On the last day of August, in Clayton, sunrise is at 6:37 am and sunset at 7:38 pm PDT.
Sunshine
In Clayton, the average sunshine in August is 11.9h.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In August, the maximum UV index of 6 suggests these recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is August in Clayton?
What is the average humidity in August in Clayton?
What is the driest month in Clayton?
How many days does it rain in August in Clayton?
How many hours of daylight does Clayton have in August?
When are sunrise and sunset in August in Clayton?
How many hours of sunshine does Clayton have in August?
When is the highest UV index in Clayton?
What is the UV index reading in August in Clayton?
Average temperature in August
Clayton, CA
- Average high temperature in August: 85.1°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is December (55.4°F).
- Average low temperature in August: 57.4°F
The month with the highest average low temperature is September (57.6°F).
The coldest month (with the lowest average low temperature) is January (41.7°F).
Average pressure in August
Clayton, CA
- Average pressure in August: 29.92"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in August
Clayton, CA
- Average wind speed in August: 6.6mph
The windiest month (with the highest average wind speed) is May (7.4mph).
The calmest month (with the lowest average wind speed) is November (4.3mph).
Average humidity in August
Clayton, CA
- Average humidity in August: 58%
The months with the highest relative humidity are January and March (73%).
The months with the lowest relative humidity are September and October (55%).
Average rainfall in August
Clayton, CA
- Average rainfall in August: 0.04"
The wettest month (with the highest rainfall) is February (0.98").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in August
Clayton, CA
- Average rainfall days in August: 0.8 days
The month with the highest number of rainy days is March (8.6 days).
The month with the least rainy days is August (0.8 days).
Average daylight in August /
Average sunshine in August
Clayton, CA
- Average daylight in August: 13h and 4min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in August: 11h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in August
Clayton, CA
- Average sunshine days in August: 29.4 days
The month with the most sunshine days is August (29.4 days).
The month with the least sunshine days is March (21.7 days).
Average UV index in August
Clayton, 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).
Average cloud cover in August
Clayton, CA
- Average cloud cover in August: 8
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 6).
Average visibility in August
Clayton, 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).
Clayton, California, USA
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