December weather forecast
Delray Beach, FL

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The strip of Delray Beach in Florida and the vast neon-lit city front
The strip of Delray Beach in Florida and the vast neon-lit city front

Weather in December

December seals the year-end with characteristic coolness in Delray Beach, Florida. Characterized by the lowest rainfall of the year, December stands at 1.81in, marking a dry end to the year. Despite being the coldest month, the city enjoys unusually long hours of sunshine. While the sea temperature follows a decreasing trend, the wind speed holds steady, ensuring breezy winter days. Meanwhile, January teases a similar chilly commencement to the new year.

Temperature

Delray Beach measures an average high-temperature of a still warm 75°F (23.9°C) in December, nearly consistent with the preceding month. In December, Delray Beach's nighttime temperatures demonstrate a slight decrease, stabilizing at an average of 68.2°F (20.1°C).

Humidity

June, September and December, with an average relative humidity of 75%, are the most humid months in Delray Beach.

Rainfall

In Delray Beach, in December, it is raining for 15.6 days, with typically 1.81" (46mm) of accumulated precipitation. Throughout the year, in Delray Beach, there are 229 rainfall days, and 46.46" (1180mm) of precipitation is accumulated.

Ocean temperature

In Delray Beach, the average seawater temperature in December is 76.1°F (24.5°C).
Note: Given an individual's cold sensitivity, considering factors like sunshine, wind, and air temperature, a brief swim in 76.1°F (24.5°C) water might be pleasurable. (FYI: The standard water temperature for Olympic swimming contests is 77°F (25°C) to 82.4°F (28°C).)

Daylight

December has the shortest days of the year, with an average of 10h and 30min of daylight.
On the first day of December, sunrise is at 6:51 am and sunset at 5:27 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 5:39 pm EST.

Sunshine

January and December, with an average of 6.1h of sunshine, are months with the least sunshine in Delray Beach.

UV index

In Delray Beach, the average daily maximum UV index in December is 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: In December, the maximum UV index of 6 translates into these guidelines:
Ward off overexposure. Defence against solar harm is crucial. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Always opt for UVA and UVB-resistant sunglasses on radiant days. Warning! Reflective surfaces like sand and water amplify the Sun's UV radiation.
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Frequently asked questions

What is the usual temperature for Delray Beach in December?

The average high-temperature and low-temperature in Delray Beach, Florida, during December are 75°F (23.9°C) and 68.2°F (20.1°C) respectively. In October, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which represents the influence of relative humidity on air temperature, is computed to be 87.8°F (31°C).

What are the most humid months in Delray Beach?

June, September and December, with an average relative humidity of 75%, are most humid months in Delray Beach.

What is the average humidity in December in Delray Beach?

In December, the average relative humidity is 75%.

How much does it rain in Delray Beach in December?

In Delray Beach, during December, the rain falls for 15.6 days and regularly aggregates up to 1.81" (46mm) of precipitation.

What is the ocean temperature in December in Delray Beach?

In Delray Beach, the average seawater temperature in December is 76.1°F (24.5°C). For individuals prone to feeling cold, swimming in 73.4°F (23°C) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 76.1°F (24.5°C).

What is the month with the shortest days in Delray Beach?

December has the shortest days of the year in Delray Beach, with an average of 10h and 30min of daylight.

How many hours of daylight does Delray Beach have in December?

The average day length in December in Delray Beach, Florida, is 10h and 31min.

When are sunrise and sunset in December in Delray Beach?

On the first day of December in Delray Beach, Florida, sunrise is at 6:51 am and sunset at 5:27 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 5:39 pm EST.

What are the months with the least sunshine in Delray Beach?

The months with the least sunshine in Delray Beach are January and December, with an average of 6.1h of sunshine.

How long on average sun shines in December in Delray Beach?

In Delray Beach, the average sunshine duration in December is 6.1h.

What is the UV index reading in December in Delray Beach?

In Delray Beach, Florida, the average daily maximum UV index in December is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to Sun's UV rays.

Average temperature in December
Delray Beach, FL

Average temperature in December - Delray Beach, FL
  • Average high temperature in December: 75°F

The warmest month (with the highest average high temperature) is August (86.9°F).
The month with the lowest average high temperature is January (72.5°F).

  • Average low temperature in December: 68.2°F

The month with the highest average low temperature is August (81.5°F).
The coldest month (with the lowest average low temperature) is January (64°F).

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Average pressure in December
Delray Beach, FL

Average pressure in December - Delray Beach, FL
  • Average pressure in December: 30.09"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are September and October (29.96"Hg).

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Average wind speed in December
Delray Beach, FL

Average wind speed in December - Delray Beach, FL
  • Average wind speed in December: 11mph

The windiest month (with the highest average wind speed) is March (11.5mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).

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Average humidity in December
Delray Beach, FL

Average humidity in December - Delray Beach, FL
  • Average humidity in December: 75%

The months with the highest relative humidity are June, September and December (75%).
The month with the lowest relative humidity is March (70%).

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Average rainfall in December
Delray Beach, FL

Average rainfall in December - Delray Beach, FL
  • Average rainfall in December: 1.81"

The wettest month (with the highest rainfall) is August (8.03").
The driest month (with the least rainfall) is January (1.1").

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Average rainfall days in December
Delray Beach, FL

Average rainfall days in December - Delray Beach, FL
  • Average rainfall days in December: 15.6 days

The month with the highest number of rainy days is August (27.3 days).
The month with the least rainy days is February (12.6 days).

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Average sea temperature in December
Delray Beach, FL

Average sea temperature in December - Delray Beach, FL
  • Average sea temperature in December: 76.1°F

The best month for swimming (with the highest average sea temperature) is August (86.3°F).
The coldest months (with the lowest average sea temperature) are January and February (74.2°F).

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Average daylight in December /
Average sunshine in December
Delray Beach, FL

Average daylight in December / Average sunshine in December - Delray Beach, FL
  • Average daylight in December: 10h and 3min

The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).

  • Average sunshine in December: 6h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The months with the least sunshine are January and December (Average sunshine: 6h and 6min).

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Average sunshine days in December
Delray Beach, FL

Average sunshine days in December - Delray Beach, FL
  • Average sunshine days in December: 11 days

The month with the most sunshine days is March (14.2 days).
The month with the least sunshine days is September (2.5 days).

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Average UV index in December
Delray Beach, FL

Average UV index in December - Delray Beach, FL
  • Average UV index in December: 6

The months with the highest UV index are May, June, July, August and September (UV index 7).
The months with the lowest UV index are January and February (UV index 5).

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Average cloud cover in December
Delray Beach, FL

Average cloud cover in December - Delray Beach, FL
  • Average cloud cover in December: 36

The months with the most cloud cover are January, October, November and December (Cloud cover 36).
The months with the least cloud cover are April, May and July (Cloud cover 29).

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Average visibility in December
Delray Beach, FL

Average visibility in December - Delray Beach, FL
  • Average visibility in December: 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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Delray Beach, Florida, USA

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