August weather forecast
Simi Valley, CA

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The Simi Valley city in California, with a view of the scenic Rocky Peak and hilly ranges
The Simi Valley city in California, with a view of the scenic Rocky Peak and hilly ranges

Weather in August

August, the last month of the summer in Simi Valley, is also a moderately hot month, with an average temperature varying between 82.2°F (27.9°C) and 63.1°F (17.3°C).

Temperature

In Simi Valley, the peak average temperatures are observed in August, with a high of 82.2°F (27.9°C) and a low of 63.1°F (17.3°C).

Heat index

August's average heat index is evaluated at 84.2°F (29°C). Exhaustion might be the outcome of enduring exposure and continuous activity, with a risk of heat cramps.
Note that heat index values are valued for light wind and location in the shade. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', provides an understanding of perceived warmth by combining temperature and relative humidity. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.

Humidity

The average relative humidity in August in Simi Valley, California, is 56%.

Rainfall

In Simi Valley, in August, it is raining for 1.5 days, with typically 0.12" (3mm) of accumulated precipitation. Throughout the year, there are 53.7 rainfall days, and 9.61" (244mm) of precipitation is accumulated.

Daylight

The average length of the day in August in Simi Valley is 13h and 23min.
On the first day of August in Simi Valley, sunrise is at 6:06 am and sunset at 7:56 pm. On the last day of the month, sunrise is at 6:28 am and sunset at 7:21 pm PDT.

Sunshine

In Simi Valley, the average sunshine in August is 12h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: A daily high UV index of 6 in August leads to these guidelines:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
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Frequently asked questions

What time of the year is the hottest in Simi Valley?

August, characterized by an average high temperature of 82.2°F (27.9°C) and a low temperature of 63.1°F (17.3°C), is generally the warmest month in Simi Valley, California.

What are August temperatures in Simi Valley?

The high-temperature, in August, in Simi Valley, is 82.2°F (27.9°C), while the low-temperature averages to 63.1°F (17.3°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines relative humidity and air temperature, in August is evaluated at 84.2°F (29°C).

What is the average humidity in August in Simi Valley?

The average relative humidity in August in Simi Valley, California, is 56%.

How much does it rain in Simi Valley in August?

In August, the rain falls for 1.5 days. Throughout August, 0.12" (3mm) of precipitation is accumulated.

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

The average day length in August is 13h and 23min.

When are sunrise and sunset in August in Simi Valley?

In August, on the first day of the month, sunrise is at 6:06 am and sunset at 7:56 pm. On the last day of the month, in Simi Valley, California, sunrise is at 6:28 am and sunset at 7:21 pm PDT.

How long on average sun shines in August in Simi Valley?

In Simi Valley, California, the average sunshine duration in August is 12h.

What is the month with the highest UV index in Simi Valley?

June through August, with an average maximum UV index of 6, are months with the highest UV index in Simi Valley, California.

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

In Simi Valley, California, the average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes a high hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Simi Valley, CA

Average temperature in August - Simi Valley, CA
  • Average high temperature in August: 82.2°F

The warmest month (with the highest average high temperature) is August (82.2°F).
The month with the lowest average high temperature is December (60.1°F).

  • Average low temperature in August: 63.1°F

The month with the highest average low temperature is August (63.1°F).
The coldest month (with the lowest average low temperature) is December (46.4°F).

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Average pressure in August
Simi Valley, CA

Average pressure in August - Simi Valley, CA
  • Average pressure in August: 29.91"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are June and September (29.9"Hg).

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Average wind speed in August
Simi Valley, CA

Average wind speed in August - Simi Valley, CA
  • Average wind speed in August: 4.3mph

The windiest month (with the highest average wind speed) is December (6.5mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).

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Average humidity in August
Simi Valley, CA

Average humidity in August - Simi Valley, CA
  • Average humidity in August: 56%

The month with the highest relative humidity is June (62%).
The month with the lowest relative humidity is November (50%).

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Average rainfall in August
Simi Valley, CA

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

The wettest month (with the highest rainfall) is February (1.93").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days in August
Simi Valley, CA

Average rainfall days in August - Simi Valley, CA
  • Average rainfall days in August: 1.5 days

The month with the highest number of rainy days is March (8 days).
The months with the least rainy days are June and August (1.5 days).

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

Average daylight in August / Average sunshine in August - Simi 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 0min

The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 48min).

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Average sunshine days in August
Simi Valley, CA

Average sunshine days in August - Simi Valley, CA
  • Average sunshine days in August: 25.4 days

The month with the most sunshine days is August (25.4 days).
The month with the least sunshine days is February (20.9 days).

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Average UV index in August
Simi Valley, CA

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

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

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Average cloud cover in August
Simi Valley, CA

Average cloud cover in August - Simi Valley, CA
  • Average cloud cover in August: 5

The month with the most cloud cover is March (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in August
Simi Valley, CA

Average visibility in August - Simi 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).

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Simi Valley, California, USA

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