August weather forecast
Castella, CA

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Weather in August

The last month of the summer, August, is another warm month in Castella, California, with an average temperature fluctuating between 84.7°F (29.3°C) and 51.4°F (10.8°C).

Temperature

August ushers in an average high-temperature of a still moderately hot 84.7°F (29.3°C), aligning closely with the preceding month. A striking departure from daytime highs to an average low-temperature of 51.4°F (10.8°C) is witnessed during August.

Heat index

In August, the average heat index is appraised at 84.2°F (29°C). If exposure and activity are sustained, they might cause a feeling of weariness, resulting in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', combines both the air temperature and the humidity level to give a perceived human temperature. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.

Humidity

August is the least humid month, with an average relative humidity of 44%.

Rainfall

In August, the rain falls for 2.7 days. Throughout August, 0.28" (7mm) of precipitation is accumulated. In Castella, during the entire year, the rain falls for 113.4 days and collects up to 31.3" (795mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

The average length of the day in August is 13h and 46min.
On the first day of the month, sunrise is at 6:05 am and sunset at 8:25 pm. On the last day of August, sunrise is at 6:35 am and sunset at 7:42 pm PDT.

Sunshine

The average sunshine in August in Castella, California, is 12h.

UV index

In Castella, California, the average daily maximum UV index in August is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk 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:
Take precautions - Protection against sun damage is advised. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Updated: Feb 9, 2024 | Published by: Weather U.S. | About Us / Weather Forecasting / Data Sources

Frequently asked questions

How hot is it in Castella in August?

In August, in Castella, the average high-temperature is 84.7°F (29.3°C), and the average low-temperature is 51.4°F (10.8°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which represents the influence of relative humidity on air temperature, in August is appraised at 84.2°F (29°C).

What is the least humid month in Castella?

August is the least humid month in Castella, California, with an average relative humidity of 44%.

What is the average humidity in August in Castella?

In August, the average relative humidity is 44%.

How much does it rain in Castella in August?

In Castella, during August, the rain falls for 2.7 days and regularly aggregates up to 0.28" (7mm) of precipitation.

When it does not snow in Castella?

June through September are months without snowfall in Castella.

What is the average length of the day in August in Castella?

In Castella, the average day length in August is 13h and 46min.

When is the sunrise / sunset in August in Castella?

In August, on the first day of the month, sunrise is at 6:05 am and sunset at 8:25 pm. On the last day of the month, in Castella, California, sunrise is at 6:35 am and sunset at 7:42 pm PDT.

How long on average sun shines in August in Castella?

The average sunshine duration in August in Castella, California, is 12h.

How high is the UV index in August in Castella?

The average daily maximum UV index in August is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Castella, CA

Average temperature in August - Castella, CA
  • Average high temperature in August: 84.7°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 (41°F).

  • Average low temperature in August: 51.4°F

The months with the highest average low temperature are July and August (51.4°F).
The coldest month (with the lowest average low temperature) is December (26.8°F).

Average pressure in August
Castella, CA

Average pressure in August - Castella, CA
  • Average pressure in August: 29.93"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).

Average wind speed in August
Castella, CA

Average wind speed in August - Castella, CA
  • Average wind speed in August: 4.1mph

The windiest month (with the highest average wind speed) is March (5.7mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).

Average humidity in August
Castella, CA

Average humidity in August - Castella, CA
  • Average humidity in August: 44%

The month with the highest relative humidity is March (81%).
The month with the lowest relative humidity is August (44%).

Average rainfall in August
Castella, CA

Average rainfall in August - Castella, CA
  • Average rainfall in August: 0.28"

The wettest month (with the highest rainfall) is March (5.55").
The driest month (with the least rainfall) is July (0.24").

Average rainfall days in August
Castella, CA

Average rainfall days in August - Castella, CA
  • Average rainfall days in August: 2.7 days

The month with the highest number of rainy days is March (17.3 days).
The month with the least rainy days is August (2.7 days).

Average snowfall in August
Castella, CA

Average snowfall in August - Castella, CA
  • Average snowfall in August: 0"

The month with the highest snowfall is January (12.6").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in August
Castella, CA

Average snowfall days in August - Castella, CA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is December (6.4 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in August / Average sunshine in August - Castella, CA
  • Average daylight in August: 13h and 5min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • 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: 5h and 12min).

Average sunshine days in August
Castella, CA

Average sunshine days in August - Castella, CA
  • Average sunshine days in August: 25.7 days

The month with the most sunshine days is August (25.7 days).
The month with the least sunshine days is March (11.1 days).

Average UV index in August
Castella, CA

Average UV index in August - Castella, CA
  • Average UV index in August: 5

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in August
Castella, CA

Average cloud cover in August - Castella, CA
  • Average cloud cover in August: 6

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 6).

Average visibility in August
Castella, CA

Average visibility in August - Castella, CA
  • Average visibility in August: 6mi

The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).

Castella, California, USA

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