September weather forecast and climate
Aptos, CA

Weather in September

September, the first month of the autumn, in Aptos, is still a pleasant month, with average temperature varying between 55.2°F (12.9°C) and 73°F (22.8°C).

Temperature

The warmest months are August and September, with an average high-temperature of 73°F (22.8°C).

Humidity

In Aptos, the average relative humidity is 70%.

Rainfall

In Aptos, it is raining for 2.7 days, with typically 0.12" (3mm) of accumulated precipitation. In Aptos, during the entire year, the rain falls for 77.9 days and collects up to 14.45" (367mm) of precipitation.

Daylight

The average length of the day in September is 12.4h.

Sunshine

In September, the average sunshine is 10.9h.

UV index

Months with the highest UV index are June through September, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to the UV radiation for ordinary individuals.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What are the warmest months in Aptos?

August and September, with an average high-temperature of 73°F (22.8°C), are warmest months.

What is the temperature in September in Aptos?

In Aptos, California, in September, the average high-temperature is 73°F (22.8°C), and the average low-temperature is 55.2°F (12.9°C).

What is the average humidity in September in Aptos?

The average relative humidity in September is 70%.

How much does it rain in Aptos in September?

In Aptos, in September, it is raining for 2.7 days, with typically 0.12" (3mm) of accumulated precipitation.

What is the average length of the day in September in Aptos?

In Aptos, California, the average length of the day in September is 12.4h.

How long on average sun shines in September in Aptos?

In Aptos, California, the average sunshine in September is 10.9h.

When is the highest UV index in Aptos?

Months with the highest UV index in Aptos are June through September, with an average maximum UV index of 5.

How high is the UV index in September in Aptos?

In September, the average daily maximum UV index in Aptos, California, is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in September
Aptos, CA

Average temperature in September - Aptos, CA
  • Average high temperature in September: 73°F

The warmest months (with the highest average high temperature) are August and September (73°F).
The month with the lowest average high temperature is December (57.2°F).

  • Average low temperature in September: 55.2°F

The month with the highest average low temperature is September (55.2°F).
The coldest month (with the lowest average low temperature) is February (45.5°F).

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Average pressure in September
Aptos, CA

Average pressure in September - Aptos, CA
  • Average pressure in September: 29.92"

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is September (29.92").

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Average wind speed in September
Aptos, CA

Average wind speed in September - Aptos, CA
  • Average wind speed in September: 5.7mph

The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

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Average humidity in September
Aptos, CA

Average humidity in September - Aptos, CA
  • Average humidity in September: 70%

The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is October (68%).

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Average rainfall in September
Aptos, CA

Average rainfall in September - Aptos, CA
  • Average rainfall in September: 0.12"

The wettest month (with the highest rainfall) is December (2.8").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in September
Aptos, CA

Average rainfall days in September - Aptos, CA
  • Average rainfall days in September: 2.7 days

The month with the highest number of rainy days is March (13.4 days).
The month with the least rainy days is August (1.2 days).

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Average daylight in September /
Average sunshine in September
Aptos, CA

Average daylight in September / Average sunshine in September - Aptos, CA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.7h).

  • Average sunshine in September: 10.9h

The month with the most sunshine is July (Average sunshine: 11.7h).
The month with the least sunshine is December (Average sunshine: 5.8h).

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Average sunshine days in September
Aptos, CA

Average sunshine days in September - Aptos, CA
  • Average sunshine days in September: 26.3 days

The month with the most sunshine days is August (27.8 days).
The month with the least sunshine days is March (16.4 days).

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Average UV index in September
Aptos, CA

Average UV index in September - Aptos, CA
  • Average UV index in September: 5

Months with the highest UV index are June, July, August and September (UV index 5).
Months with the lowest UV index are February and November (UV index 3).

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Average cloud cover in September
Aptos, CA

Average cloud cover in September - Aptos, CA
  • Average cloud cover in September: 15

The month with the most cloud cover is March (Cloud cover 38).
Months with the least cloud cover are July and September (Cloud cover 15).

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Average visibility in September
Aptos, CA

Average visibility in September - Aptos, CA
  • Average visibility in September: 6mi

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

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