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
July and August, with an average high-temperature of 73°F (22.8°C), are marked as the warmest months.Humidity
In Atherton, California, the average relative humidity in August is 73%.Rainfall
July and August are months with the least rain in Atherton, California, when the rain falls for 0.8 days and typically aggregates up to 0.04" (1mm) of rain.Daylight
In Atherton, California, the average length of the day in August is 13h and 34min.On the first day of August, sunrise is at 6:13 am and sunset at 8:16 pm. On the last day of the month, sunrise is at 6:39 am and sunset at 7:38 pm PDT.
Sunshine
The average sunshine in August in Atherton, California, is 11.9h.UV index
The months with the highest UV index are June through September, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: In August, the maximum UV index of 5 transforms into these recommendations:
Be vigilant - Preventing sunburn is recommended. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Experience reduced UV exposure by about half when donning a wide-brim hat.
Frequently asked questions
What is the warmest month in Atherton?
What are the temperatures in Atherton in August?
What is the average humidity in August in Atherton?
What is the driest month in Atherton?
How much does it rain in Atherton in August?
How many hours of daylight does Atherton have in August?
What time are sunrise and sunset in August in Atherton?
How long on average sun shines in August in Atherton?
What is the month with the highest UV index in Atherton?
What is the UV index reading in August in Atherton?
Average temperature in August
Atherton, CA
- Average high temperature in August: 73°F
The warmest months (with the highest average high temperature) are July and August (73°F).
The month with the lowest average high temperature is December (55.9°F).
- Average low temperature in August: 56.1°F
The month with the highest average low temperature is September (56.7°F).
The coldest month (with the lowest average low temperature) is February (46°F).
Average pressure in August
Atherton, CA
- Average pressure in August: 29.93"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).
Average wind speed in August
Atherton, CA
- Average wind speed in August: 5.5mph
The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest months (with the lowest average wind speed) are August, September and October (5.5mph).
Average humidity in August
Atherton, CA
- Average humidity in August: 73%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is October (68%).
Average rainfall in August
Atherton, CA
- Average rainfall in August: 0.04"
The wettest month (with the highest rainfall) is February (2.36").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in August
Atherton, CA
- Average rainfall days in August: 0.8 days
The month with the highest number of rainy days is March (12.8 days).
The month with the least rainy days is August (0.8 days).
Average daylight in August /
Average sunshine in August
Atherton, CA
- Average daylight in August: 13h and 4min
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 36min).
- Average sunshine in August: 11h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in August
Atherton, CA
- Average sunshine days in August: 27.6 days
The month with the most sunshine days is August (27.6 days).
The month with the least sunshine days is March (17.5 days).
Average UV index in August
Atherton, CA
- Average UV index in August: 5
The months with the highest UV index are June, July, August and September (UV index 5).
The months with the lowest UV index are November and December (UV index 3).
Average cloud cover in August
Atherton, CA
- Average cloud cover in August: 10
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in August
Atherton, 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).
Atherton, California, USA
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