August weather forecast
Sun Valley, CA

Share

Weather in August

August, the last month of the summer in Sun Valley, is a tropical month, with an average temperature fluctuating between 64.8°F (18.2°C) and 86.5°F (30.3°C).

Temperature

August proves to be the warmest month, recording an average peak temperature of 86.5°F (30.3°C) and a minimum temperature of 64.8°F (18.2°C).

Heat index

The heat index for August is evaluated at a tropical 89.6°F (32°C). Uninterrupted activity during exposure could lead to a sense of exhaustion, possibly causing heat cramps.
Understand that the heat index values take into account shaded locations and 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 'real feel' or 'feels like', embodies the combination of air temperature and moisture content to illustrate perceived heat. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.

Humidity

The average relative humidity in August is 51%.

Rainfall

In Sun Valley, during August, the rain falls for 1.7 days and regularly aggregates up to 0.12" (3mm) of precipitation. Throughout the year, there are 40.1 rainfall days, and 5.87" (149mm) of precipitation is accumulated.

Daylight

In August, the average length of the day in Sun Valley, California, is 13h and 23min.
On the first day of August in Sun Valley, sunrise is at 6:05 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 6:26 am and sunset at 7:20 pm PDT.

Sunshine

The months with the most sunshine are June through August, with an average of 12.1h of sunshine.

UV index

June through September, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability 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 precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
[Resources]

Frequently asked questions

What is the warmest month in Sun Valley?

August registers as the month with the average highest temperatures, reaching 86.5°F (30.3°C) at its peak and 64.8°F (18.2°C) at the lowest.

How hot is August in Sun Valley?

Sun Valley in August has an average high-temperature of 86.5°F (30.3°C) and an average low-temperature of 64.8°F (18.2°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which factors the actual air temperature with the relative humidity, in August is evaluated at 89.6°F (32°C).

What is the average humidity in August in Sun Valley?

In Sun Valley, California, the average relative humidity in August is 51%.

How much does it rain in Sun Valley in August?

In Sun Valley, in August, during 1.7 rainfall days, 0.12" (3mm) of precipitation is typically accumulated.

How many hours of daylight does Sun Valley have in August?

In Sun Valley, the average day length in August is 13h and 23min.

When are sunrise and sunset in August in Sun Valley?

On the first day of August, sunrise is at 6:05 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 6:26 am and sunset at 7:20 pm PDT.

What are the months with the most sunshine in Sun Valley?

June through August, with an average of 12.1h of sunshine, are months with the most sunshine in Sun Valley, California.

How many hours of sunshine does Sun Valley have in August?

In August, the average sunshine duration is 12.1h.

What are the months with the highest UV index in Sun Valley?

June through September, with an average maximum UV index of 6, are months with the highest UV index in Sun Valley.

How high is the UV index in August in Sun Valley?

The average daily maximum UV index in August in Sun Valley is 6. A UV Index reading of 6 to 7 represents a high health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Sun Valley, CA

Average temperature in August - Sun Valley, CA
  • Average high temperature in August: 86.5°F

The warmest month (with the highest average high temperature) is August (86.5°F).
The month with the lowest average high temperature is December (61.7°F).

  • Average low temperature in August: 64.8°F

The month with the highest average low temperature is August (64.8°F).
The coldest month (with the lowest average low temperature) is December (46.2°F).

[Resources]

Average pressure in August
Sun Valley, CA

Average pressure in August - Sun Valley, CA
  • Average pressure in August: 29.9"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

[Resources]

Average wind speed in August
Sun Valley, CA

Average wind speed in August - Sun Valley, CA
  • Average wind speed in August: 4.5mph

The windiest month (with the highest average wind speed) is April (5.9mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).

[Resources]

Average humidity in August
Sun Valley, CA

Average humidity in August - Sun Valley, CA
  • Average humidity in August: 51%

The month with the highest relative humidity is June (59%).
The month with the lowest relative humidity is November (48%).

[Resources]

Average rainfall in August
Sun Valley, CA

Average rainfall in August - Sun Valley, CA
  • Average rainfall in August: 0.12"

The wettest month (with the highest rainfall) is December (1.18").
The driest month (with the least rainfall) is June (0.04").

[Resources]

Average rainfall days in August
Sun Valley, CA

Average rainfall days in August - Sun Valley, CA
  • Average rainfall days in August: 1.7 days

The month with the highest number of rainy days is March (5.2 days).
The month with the least rainy days is June (1 days).

[Resources]

Average daylight in August /
Average sunshine in August
Sun Valley, CA

Average daylight in August / Average sunshine in August - Sun Valley, CA
  • Average daylight in August: 13h and 2min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in August: 12h and 1min

The months with the most sunshine are June, July and August (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 54min).

[Resources]

Average sunshine days in August
Sun Valley, CA

Average sunshine days in August - Sun Valley, CA
  • Average sunshine days in August: 26.3 days

The month with the most sunshine days is October (27.1 days).
The month with the least sunshine days is February (22.9 days).

[Resources]

Average UV index in August
Sun Valley, CA

Average UV index in August - Sun Valley, CA
  • Average UV index in August: 6

The months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).

[Resources]

Average cloud cover in August
Sun Valley, CA

Average cloud cover in August - Sun Valley, CA
  • Average cloud cover in August: 4

The 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).

[Resources]

Average visibility in August
Sun Valley, CA

Average visibility in August - Sun 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).

[Resources]

Sun Valley, California, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location