September weather forecast
Del Mar, CA

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Weather in September

September, the first month of the autumn in Del Mar, is still a warm month, with an average temperature varying between 76.6°F (24.8°C) and 64.8°F (18.2°C).

Temperature

Del Mar experiences its highest average temperatures in September, reaching a peak of 76.6°F (24.8°C) and a minimum of 64.8°F (18.2°C).

Humidity

In Del Mar, the average relative humidity in September is 69%.

Rainfall

In September, the rain falls for 3.8 days. Throughout September, 0.28" (7mm) of precipitation is accumulated. Throughout the year, in Del Mar, there are 55.7 rainfall days, and 5.75" (146mm) of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 22min.
On the first day of the month, sunrise is at 6:24 am and sunset at 7:13 pm. On the last day of September, sunrise is at 6:43 am and sunset at 6:34 pm PDT.

Sunshine

In Del Mar, the average sunshine in September is 10.3h.

UV index

In September, the average daily maximum UV index in Del Mar, California, is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: A daily maximum UV index of 5 in September translates into the following instructions:
Take precautions - Protection against sunburn is recommended. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
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Frequently asked questions

What is the warmest month in Del Mar?

In Del Mar, September is known for its average highest temperatures, reaching a high of 76.6°F (24.8°C) and a low of 64.8°F (18.2°C).

What is the average September temperature in Del Mar?

In Del Mar, 76.6°F (24.8°C) is the average high-temperature and 64.8°F (18.2°C) is the average low-temperature during September.

What is the average humidity in September in Del Mar?

In Del Mar, the average relative humidity in September is 69%.

How much does it rain in Del Mar in September?

In September, the rain falls for 3.8 days. Throughout September, 0.28" (7mm) of precipitation is accumulated.

What is the average length of the day in September in Del Mar?

The average day length in September in Del Mar is 12h and 22min.

When is the sunrise / sunset in September in Del Mar?

On the first day of September in Del Mar, sunrise is at 6:24 am and sunset at 7:13 pm. On the last day of the month, sunrise is at 6:43 am and sunset at 6:34 pm PDT.

How long on average sun shines in September in Del Mar?

In Del Mar, California, the average sunshine duration in September is 10.3h.

How high is the UV index in September in Del Mar?

The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability 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 September
Del Mar, CA

Average temperature in September - Del Mar, CA
  • Average high temperature in September: 76.6°F

The warmest month (with the highest average high temperature) is September (76.6°F).
The months with the lowest average high temperature are February and December (63°F).

  • Average low temperature in September: 64.8°F

The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (51.8°F).

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Average pressure in September
Del Mar, CA

Average pressure in September - Del Mar, CA
  • Average pressure in September: 29.88"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are June and September (29.88"Hg).

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Average wind speed in September
Del Mar, CA

Average wind speed in September - Del Mar, CA
  • Average wind speed in September: 5.4mph

The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest month (with the lowest average wind speed) is October (5.2mph).

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Average humidity in September
Del Mar, CA

Average humidity in September - Del Mar, CA
  • Average humidity in September: 69%

The month with the highest relative humidity is June (75%).
The month with the lowest relative humidity is November (60%).

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Average rainfall in September
Del Mar, CA

Average rainfall in September - Del Mar, CA
  • Average rainfall in September: 0.28"

The wettest month (with the highest rainfall) is December (1.06").
The driest month (with the least rainfall) is June (0.12").

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Average rainfall days in September
Del Mar, CA

Average rainfall days in September - Del Mar, CA
  • Average rainfall days in September: 3.8 days

The month with the highest number of rainy days is March (7.4 days).
The month with the least rainy days is August (2.8 days).

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Average daylight in September /
Average sunshine in September
Del Mar, CA

Average daylight in September / Average sunshine in September - Del Mar, CA
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in September: 10h and 2min

The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).

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Average sunshine days in September
Del Mar, CA

Average sunshine days in September - Del Mar, CA
  • Average sunshine days in September: 23.7 days

The month with the most sunshine days is October (25.9 days).
The month with the least sunshine days is February (21 days).

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Average UV index in September
Del Mar, CA

Average UV index in September - Del Mar, CA
  • Average UV index in September: 5

The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).

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Average cloud cover in September
Del Mar, CA

Average cloud cover in September - Del Mar, CA
  • Average cloud cover in September: 12

The months with the most cloud cover are March and December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 9).

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Average visibility in September
Del Mar, CA

Average visibility in September - Del Mar, CA
  • Average visibility in September: 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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Del Mar, California, USA

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