May weather forecast
Miami Beach, FL

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Clear blue waters of Miami Beach in Florida
Clear blue waters of Miami Beach in Florida

Weather in May

In May, Miami Beach transitions fully into its summer season with relatively hot weather. The month is marked by a noticeable increase in humidity to 72%. The city experiences a substantial rise in rainfall, from 0.75" (19mm) in April to 1.77" (45mm) in May. Despite the increase in rainfall, there are still plenty of sun-filled days with more than half of the days experiencing sunshine. Overall, May is hot and humid, a classic sign of approaching summer.

Temperature

The commencement of May introduces an average high-temperature of a still moderately hot 82°F (27.8°C), closely mirroring the preceding month. Miami Beach registers a gentle descent to an average nighttime low of 77°F (25°C) in May from its daytime highs.

Heat index

May's heat index is appraised at a hot 87.8°F (31°C). Prolonged exposure combined with continuous activity could lead to exhaustion, and possibly heat cramps.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', gives an indication of how one might feel in terms of heat after considering humidity. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.

Humidity

The average relative humidity in May is 72%.

Rainfall

In Miami Beach, in May, it is raining for 15.3 days, with typically 1.77" (45mm) of accumulated precipitation. Throughout the year, there are 182.7 rainfall days, and 16.38" (416mm) of precipitation is accumulated.

Ocean temperature

In May, the average ocean temperature in Miami Beach is 80.6°F (27°C).
Note: For any water activity, surface water temperatures from 77°F (25°C) to 84.2°F (29°C) are deemed perfect and extremely pleasing for enduring enjoyment.

Daylight

In May, the average length of the day is 13h and 25min.
On the first day of the month, sunrise is at 6:43 am and sunset at 7:52 pm. On the last day of May, in Miami Beach, sunrise is at 6:29 am and sunset at 8:07 pm EDT.

Sunshine

The average sunshine in May is 10.7h.

UV index

May through October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum UV index of 7 during May translates into these guidelines:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Enhance your sun protection with tightly woven, yet airy clothing. Caution! The reflection of sand and water significantly amplifies the Sun's UV radiation.
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Frequently asked questions

What are May temperatures in Miami Beach?

In Miami Beach, 82°F (27.8°C) is the average high-temperature and 77°F (25°C) is the average low-temperature during May. The average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in May is appraised at 87.8°F (31°C).

What is the average humidity in May in Miami Beach?

The average relative humidity in May in Miami Beach is 72%.

How much does it rain in Miami Beach in May?

In Miami Beach, in May, it is raining for 15.3 days, with typically 1.77" (45mm) of accumulated precipitation.

How warm is the water in May in Miami Beach?

In Miami Beach, Florida, in May, the average water temperature is 80.6°F (27°C). For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the average length of the day in May in Miami Beach?

The average day length in May in Miami Beach is 13h and 25min.

When is the sunrise / sunset in May in Miami Beach?

In May, on the first day of the month, sunrise is at 6:43 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 6:29 am and sunset at 8:07 pm EDT.

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

In Miami Beach, Florida, the average sunshine duration in May is 10.7h.

When is the highest UV index in Miami Beach?

May through October, with an average maximum UV index of 7, are months with the highest UV index in Miami Beach, Florida.

What is the UV index intensity in May in Miami Beach?

In Miami Beach, the average daily maximum UV index in May is 7. A UV Index of 6 to 7 symbolizes a high hazard to health from unsafe 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
Miami Beach, FL

Average temperature in May - Miami Beach, FL
  • Average high temperature in May: 82°F

The warmest month (with the highest average high temperature) is August (87.1°F).
The month with the lowest average high temperature is January (73°F).

  • Average low temperature in May: 77°F

The month with the highest average low temperature is August (82.6°F).
The coldest month (with the lowest average low temperature) is January (65.1°F).

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Average pressure in May
Miami Beach, FL

Average pressure in May - Miami 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 (29.95"Hg).

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Average wind speed in May
Miami Beach, FL

Average wind speed in May - Miami Beach, FL
  • Average wind speed in May: 10.6mph

The windiest month (with the highest average wind speed) is March (11.6mph).
The calmest month (with the lowest average wind speed) is July (8.1mph).

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Average humidity in May
Miami Beach, FL

Average humidity in May - Miami Beach, FL
  • Average humidity in May: 72%

The month with the highest relative humidity is December (75%).
The month with the lowest relative humidity is March (70%).

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Average rainfall in May
Miami Beach, FL

Average rainfall in May - Miami Beach, FL
  • Average rainfall in May: 1.77"

The wettest month (with the highest rainfall) is August (2.8").
The driest month (with the least rainfall) is January (0.43").

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Average rainfall days in May
Miami Beach, FL

Average rainfall days in May - Miami Beach, FL
  • Average rainfall days in May: 15.3 days

The month with the highest number of rainy days is September (24.5 days).
The month with the least rainy days is February (8.7 days).

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Average sea temperature in May
Miami Beach, FL

Average sea temperature in May - Miami Beach, FL
  • Average sea temperature in May: 81°F

The best month for swimming (with the highest average sea temperature) is August (86°F).
The coldest months (with the lowest average sea temperature) are January, February and March (75°F).

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Average daylight in May /
Average sunshine in May
Miami Beach, FL

Average daylight in May / Average sunshine in May - Miami Beach, FL
  • Average daylight in May: 13h and 2min

The month with the longest days is June (Average daylight: 13h and 42min).
The month with the shortest days is December (Average daylight: 10h and 36min).

  • Average sunshine in May: 10h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).

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Average sunshine days in May
Miami Beach, FL

Average sunshine days in May - Miami Beach, FL
  • Average sunshine days in May: 11.4 days

The month with the most sunshine days is March (17 days).
The month with the least sunshine days is September (3.2 days).

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Average UV index in May
Miami Beach, FL

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

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

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Average cloud cover in May
Miami Beach, FL

Average cloud cover in May - Miami Beach, FL
  • Average cloud cover in May: 28

The month with the most cloud cover is October (Cloud cover 35).
The month with the least cloud cover is April (Cloud cover 26).

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Average visibility in May
Miami Beach, FL

Average visibility in May - Miami 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).

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Miami Beach, Florida, USA

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