May 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 May

Delray Beach, Florida experiences its most significant increase in rainfall during May, garnering 4.33in. Consequently, cloud cover tends to be plentiful, though it does little to affect the warm temperatures. The rise in humidity levels and sea temperature identifies May as the beginning of the summer season. Wind conditions slow down, but daylight hours shoot up, providing longer days. As June approaches, the weather patterns are set to receive another shakeup.

Temperature

Delray Beach records an average high-temperature of a still warm 81.3°F (27.4°C) as May arrives, nearly mirroring the previous month's climate. Delray Beach encounters a small divergence from daytime high temperatures, averaging a low-temperature of 75.9°F (24.4°C) during May nights.

Heat index

In May, the heat index is calculated to be a tropical 86°F (30°C). Ongoing activity coupled with exposure often results in weariness and could induce heat cramps.
Given the heat index, its values are aligned with shaded sites and gentle winds. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is the outcome of merging air's temperature and its humidity metrics. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.

Humidity

In May, the average relative humidity is 74%.

Rainfall

In May, the rain falls for 19 days. Throughout May, 4.33" (110mm) of precipitation is accumulated. In Delray Beach, during the entire year, the rain falls for 229 days and collects up to 46.46" (1180mm) of precipitation.

Ocean temperature

In May, the average ocean temperature in Delray Beach is 80.8°F (27.1°C).
Note: Surface water temperatures falling between 77°F (25°C) and 84.2°F (29°C) are regarded as prime and extremely agreeable for enduring periods during any water activity.

Daylight

In May, the average length of the day is 13h and 27min.
On the first day of May, sunrise is at 6:41 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 6:27 am and sunset at 8:08 pm EDT.

Sunshine

In Delray Beach, the average sunshine in May is 10.5h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: In May, the UV index of 7 transforms into the following advice:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Stay sun-safe with clothing that is both closely woven and worn loosely. Notice! The Sun's UV exposure elevates with sand and water reflections.
Updated: Aug 19, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average May temperature?

May temperatures vary between a high-temperature of 81.3°F (27.4°C) and a low-temperature of 75.9°F (24.4°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in May is calculated to be 86°F (30°C).

What is the average humidity in May?

In May, the average relative humidity is 74%.

How much does it rain in May?

In Delray Beach, in May, it is raining for 19 days, with typically 4.33" (110mm) of accumulated precipitation.

What is the water temperature in May?

In Delray Beach, the average seawater temperature in May is 80.8°F (27.1°C). Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

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

The average day length in May is 13h and 27min.

When is the sunrise / sunset in May?

In May, on the first day of the month, sunrise is at 6:41 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 6:27 am and sunset at 8:08 pm EDT.

How many hours of sunshine does Delray Beach have in May?

In May, the average sunshine duration is 10.5h.

What are the months with the highest UV index?

The months with the highest UV index are May through September, with an average maximum UV index of 7.

How high is the UV index in May?

In Delray Beach, the average daily maximum UV index in May is 7. A UV Index reading of 6 to 7 represents a high health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Delray Beach, FL

Average temperature in May - Delray Beach, FL
  • Average high temperature in May: 81.3°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 May: 75.9°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 May
Delray Beach, FL

Average pressure in May - Delray Beach, FL
  • Average pressure in May: 30.01"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 May
Delray Beach, FL

Average wind speed in May - Delray Beach, FL
  • Average wind speed in May: 10.3mph

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 May
Delray Beach, FL

Average humidity in May - Delray Beach, FL
  • Average humidity in May: 74%

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 May
Delray Beach, FL

Average rainfall in May - Delray Beach, FL
  • Average rainfall in May: 4.33"

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 May
Delray Beach, FL

Average rainfall days in May - Delray Beach, FL
  • Average rainfall days in May: 19 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 May
Delray Beach, FL

Average sea temperature in May - Delray Beach, FL
  • Average sea temperature in May: 80.8°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 May /
Average sunshine in May
Delray Beach, FL

Average daylight in May / Average sunshine in May - Delray Beach, FL
  • Average daylight in May: 13h 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 May: 10h and 3min

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 May
Delray Beach, FL

Average sunshine days in May - Delray Beach, FL
  • Average sunshine days in May: 9.7 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 May
Delray Beach, FL

Average UV index in May - Delray Beach, FL
  • Average UV index in May: 7

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 May
Delray Beach, FL

Average cloud cover in May - Delray Beach, FL
  • Average cloud cover in May: 29

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 May
Delray Beach, FL

Average visibility in May - Delray Beach, FL
  • Average visibility in May: 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).

Delray Beach, Florida, USA

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