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 commencement of August introduces an average high-temperature of a still pleasant 71.2°F (21.8°C), closely mirroring the preceding month. The month of August records an average low-temperature of 55.4°F (13°C) in Mill Valley.Humidity
In August, the average relative humidity is 76%.Rainfall
The months with the least rainfall are June through September Rain falls for 1.2 days and accumulates 0.04" (1mm) of rain.Daylight
The average length of the day in August is 13h and 35min.On the first day of the month, sunrise is at 6:14 am and sunset at 8:18 pm. On the last day of August, in Mill Valley, sunrise is at 6:40 am and sunset at 7:40 pm PDT.
Sunshine
The average sunshine in August in Mill Valley is 10.9h.UV index
April, June through September, with an average maximum UV index of 5, are months with the highest UV index. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: The daily maximum UV index of 5 in August interprets into the following advice:
Adopt protective measures - Suggestions to resist sunburn are offered. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Frequently asked questions
What is the average August temperature in Mill Valley?
What is the average humidity in August in Mill Valley?
What is the driest month in Mill Valley?
How many days does it rain in August in Mill Valley?
How many hours of daylight does Mill Valley have in August?
What time are sunrise and sunset in August in Mill Valley?
How many hours of sunshine does Mill Valley have in August?
When is the highest UV index in Mill Valley?
What is the UV index reading in August in Mill Valley?
Average temperature in August
Mill Valley, CA
- Average high temperature in August: 71.2°F
The warmest month (with the highest average high temperature) is September (72.3°F).
The month with the lowest average high temperature is December (55.4°F).
- Average low temperature in August: 55.4°F
The month with the highest average low temperature is September (56.1°F).
The coldest month (with the lowest average low temperature) is December (45.3°F).
Average pressure in August
Mill Valley, CA
- Average pressure in August: 29.92"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in August
Mill Valley, CA
- Average wind speed in August: 6.4mph
The windiest month (with the highest average wind speed) is May (7.8mph).
The calmest months (with the lowest average wind speed) are October and November (5.5mph).
Average humidity in August
Mill Valley, CA
- Average humidity in August: 76%
The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is October (68%).
Average rainfall in August
Mill Valley, CA
- Average rainfall in August: 0.04"
The wettest month (with the highest rainfall) is February (0.87").
The driest months (with the least rainfall) are June, July, August and September (0.04").
Average rainfall days in August
Mill Valley, CA
- Average rainfall days in August: 1.2 days
The month with the highest number of rainy days is March (8.8 days).
The months with the least rainy days are June and August (1.2 days).
Average daylight in August /
Average sunshine in August
Mill Valley, 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: 10h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in August
Mill Valley, CA
- Average sunshine days in August: 24.8 days
The month with the most sunshine days is June (26.4 days).
The month with the least sunshine days is March (20.7 days).
Average UV index in August
Mill Valley, CA
- Average UV index in August: 5
The months with the highest UV index are April, June, July, August and September (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in August
Mill Valley, CA
- Average cloud cover in August: 25
The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is September (Cloud cover 19).
Average visibility in August
Mill Valley, 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).
Mill Valley, California, USA
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