September weather forecast
Del Mar, CA

Weather in September

The first month of the autumn, September, is also a moderately hot month in Del Mar, California, with an average temperature fluctuating between 64.8°F (18.2°C) and 76.6°F (24.8°C).

Temperature

With an average high-temperature of 76.6°F (24.8°C) and an average low-temperature of 64.8°F (18.2°C), September is the warmest month.

Humidity

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

Rainfall

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

Daylight

The average length of the day in September is 12h and 22min.
On the first day of the month, sunrise is at 6:23 am and sunset at 7:14 pm. On the last day of September, in Del Mar, California, sunrise is at 6:42 am and sunset at 6:35 pm PDT.

Sunshine

In September, the average sunshine is 10.3h.

UV index

In Del Mar, California, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
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 the 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 is the warmest month in Del Mar?

The warmest month is September, with an average high-temperature of 76.6°F (24.8°C) and an average low-temperature of 64.8°F (18.2°C).

What is the temperature in September in Del Mar?

The average high-temperature, in September, in Del Mar, is 76.6°F (24.8°C), while the average low-temperature is 64.8°F (18.2°C).

What is the average humidity in September in Del Mar?

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

How much does it rain in Del Mar in September?

In Del Mar, California, in September, during 3.8 rainfall days, 0.28" (7mm) of precipitation is typically accumulated.

How many hours of daylight does Del Mar have in September?

In Del Mar, California, the average day length in September is 12h and 22min.

When are sunrise and sunset in September in Del Mar?

On the first day of September in Del Mar, sunrise is at 6:23 am and sunset at 7:14 pm. On the last day of the month, sunrise is at 6:42 am and sunset at 6:35 pm PDT.

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

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

What is the UV index reading in September in Del Mar?

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
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 22min

The month with the longest days is June (Average daylight: 14h and 17min).
The month with the shortest days is December (Average daylight: 10h and 1min).

  • Average sunshine in September: 10h and 18min

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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