October 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 October

October, the same as September, is another warm autumn month in Simi Valley, California, with an average temperature fluctuating between 74.1°F (23.4°C) and 57.6°F (14.2°C).

Temperature

Start of October brings a slight shift in the average high-temperature, dipping a bit from September's 79.7°F (26.5°C) to a still warm 74.1°F (23.4°C). Simi Valley records an average low-temperature of 57.6°F (14.2°C) throughout the month of October.

Humidity

In Simi Valley, the average relative humidity in October is 51%.

Rainfall

In October, in Simi Valley, California, the rain falls for 3.5 days. Throughout October, 0.31" (8mm) of precipitation is accumulated. In Simi Valley, during the entire year, the rain falls for 53.7 days and collects up to 9.61" (244mm) of precipitation.

Daylight

The average length of the day in October in Simi Valley is 11h and 19min.
On the first day of October, sunrise is at 6:50 am and sunset at 6:38 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 6:02 pm PDT.

Sunshine

In Simi Valley, the average sunshine in October is 8.4h.

UV index

In October, the average daily maximum UV index in Simi Valley is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: In October, the UV index of 5 transforms into the following advice:
Take necessary precautions - Protection from skin and eye injury is mandatory. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
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Frequently asked questions

What is the average October temperature in Simi Valley?

During October, Simi Valley experiences an average high-temperature of 74.1°F (23.4°C) and a low-temperature of 57.6°F (14.2°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 October in Simi Valley?

The average relative humidity in October in Simi Valley, California, is 51%.

How many days does it rain in October in Simi Valley?

In Simi Valley, California, during October, the rain falls for 3.5 days and regularly aggregates up to 0.31" (8mm) of precipitation.

What is the average length of the day in October in Simi Valley?

The average day length in October in Simi Valley, California, is 11h and 19min.

When are sunrise and sunset in October in Simi Valley?

On the first day of October, sunrise is at 6:50 am and sunset at 6:38 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 6:02 pm PDT.

How many hours of sunshine does Simi Valley have in October?

In October, the average sunshine duration is 8.4h.

What is the UV index reading in October in Simi Valley?

The average daily maximum UV index in October in Simi Valley, California, is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from 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 October
Simi Valley, CA

Average temperature in October - Simi Valley, CA
  • Average high temperature in October: 74.1°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 October: 57.6°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 October
Simi Valley, CA

Average pressure in October - Simi Valley, CA
  • Average pressure in October: 29.96"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 October
Simi Valley, CA

Average wind speed in October - Simi Valley, CA
  • Average wind speed in October: 5.5mph

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 October
Simi Valley, CA

Average humidity in October - Simi Valley, CA
  • Average humidity in October: 51%

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 October
Simi Valley, CA

Average rainfall in October - Simi Valley, CA
  • Average rainfall in October: 0.31"

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 October
Simi Valley, CA

Average rainfall days in October - Simi Valley, CA
  • Average rainfall days in October: 3.5 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 October /
Average sunshine in October
Simi Valley, CA

Average daylight in October / Average sunshine in October - Simi Valley, CA
  • Average daylight in October: 11h 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 October: 8h and 2min

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 October
Simi Valley, CA

Average sunshine days in October - Simi Valley, CA
  • Average sunshine days in October: 25.3 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 October
Simi Valley, CA

Average UV index in October - Simi Valley, CA
  • Average UV index in October: 5

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 October
Simi Valley, CA

Average cloud cover in October - Simi Valley, CA
  • Average cloud cover in October: 10

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 October
Simi Valley, CA

Average visibility in October - Simi Valley, CA
  • Average visibility in October: 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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