December weather forecastDelray Beach, FL
December
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 notes an average high-temperature of a still moderately hot 75°F (23.9°C) in December, displaying minor variation from November. During the nights of December, the average low-temperature holds at an agreeable 68.2°F (20.1°C).Humidity
June, September and December, with an average relative humidity of 75%, are the most humid months.Rainfall
In Delray Beach, in December, it is raining for 15.6 days, with typically 1.81" (46mm) of accumulated precipitation. Throughout the year, there are 229 rainfall days, and 46.46" (1180mm) of precipitation is accumulated.Ocean temperature
In December, the average ocean temperature is 76.1°F (24.5°C).Note: 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).
Daylight
With an average of 10h and 30min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:51 am and sunset at 5:27 pm. On the last day of December, sunrise is at 7:08 am and sunset at 5:39 pm EST.
Sunshine
The months with the least sunshine are January and December, with an average of 6.1h of sunshine.UV index
The average daily maximum UV index in December is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, the maximum UV index of 6 suggests this advice:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Always opt for UVA and UVB-resistant sunglasses on radiant days. Stay vigilant! UV rays get a boost in intensity due to sand and water reflections.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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").
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).
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).
Average daylight in December /
Average sunshine in December
Delray Beach, FL
- Average daylight in December: 10h and 30min
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 6min
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).
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).
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).
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).
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).
