May weather forecast and climate
Longboat Key, FL

May, the last month of the spring, in Longboat Key, is also a moderately hot month, with average temperature varying between 84.2°F (29°C) and 72.7°F (22.6°C).

Temperature

In May, the average high-temperature is practically the same as in April - a still warm 84.2°F (29°C). In Longboat Key, the average low-temperature is 72.7°F (22.6°C).

Heat index

In May, the average heat index is estimated at a tropical 91.6°F (33.1°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'feels like', 'apparent temperature', or 'felt air temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (clothing, wind, pregnancy). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

Months with the lowest humidity in Longboat Key are March through May, with an average relative humidity of 72%.

Rainfall

In May, the rain falls for 15.1 days. Throughout May, 2.56" (65mm) of precipitation is accumulated. Throughout the year, there are 183.1 rainfall days, and 34.92" (887mm) of precipitation is accumulated.

Ocean temperature

In Longboat Key, the average seawater temperature is 78.4°F (25.8°C).
Note: For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

The average length of the day in May is 13.5h.

Sunshine

May has the most sunshine of the year, with an average of 11.1h of sunshine.

UV index

Months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to the UV radiation for ordinary individuals.
Note: In May, the average maximum UV index of 7 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for 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. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the temperature in May in Longboat Key?

In May, the average high-temperature is 84.2°F (29°C), and the average low-temperature is 72.7°F (22.6°C). The average heat index (a.k.a. 'feels like', 'real feel'), that represents influence of the relative humidity to air temperaure, in May is appraised at 91.6°F (33.1°C).

What is the least humid month in Longboat Key?

March through May, with an average relative humidity of 72%, are the least humid months in Longboat Key, Florida.

What is the average humidity in May in Longboat Key?

In Longboat Key, the average relative humidity in May is 72%.

How many days does it rain in May in Longboat Key?

In Longboat Key, in May, it is raining for 15.1 days, with typically 2.56" (65mm) of accumulated precipitation.

How warm is the water in May in Longboat Key?

In May, the average ocean temperature in Longboat Key is 78.4°F (25.8°C). For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

What is the average length of the day in May in Longboat Key?

The average length of the day in May is 13.5h.

What month has the most sunshine in Longboat Key?

May has the most sunshine of the year in Longboat Key, with an average of 11.1h of sunshine.

How long on average sun shines in May in Longboat Key?

In May, the average sunshine in Longboat Key is 11.1h.

What is the month with the highest UV index in Longboat Key?

Months with the highest UV index in Longboat Key are May through September, with an average maximum UV index of 7.

What is the UV index reading in May in Longboat Key?

In Longboat Key, the average daily maximum UV index in May is 7. A UV Index estimate of 6 to 7 represents a high hazard to health from the exposure to the Sun's UV rays.
Average temperature in May - Longboat Key, FL
  • Average high temperature in May: 84.2°F

The warmest month (with the highest average high temperature) is August (88.5°F).
The month with the lowest average high temperature is January (68.5°F).

  • Average low temperature in May: 72.7°F

The month with the highest average low temperature is August (79.7°F).
The coldest month (with the lowest average low temperature) is January (56.1°F).

Average pressure in May - Longboat Key, FL
  • Average pressure in May: 30"

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is September (29.95").

Average wind speed in May - Longboat Key, FL
  • Average wind speed in May: 8mph

The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is July (6.4mph).

Average humidity in May - Longboat Key, FL
  • Average humidity in May: 72%

The month with the highest relative humidity is December (76%).
Months with the lowest relative humidity are March, April and May (72%).

Average rainfall in May - Longboat Key, FL
  • Average rainfall in May: 2.56"

The wettest month (with the highest rainfall) is August (6.42").
The driest months (with the least rainfall) are February and November (1.06").

Average rainfall days in May - Longboat Key, FL
  • Average rainfall days in May: 15.1 days

The month with the highest number of rainy days is August (26.8 days).
Months with the least rainy days are January, February and November (8.3 days).

Average sea temperature in May - Longboat Key, FL
  • Average sea temperature in May: 78.4°F

The best month for swimming (with the highest average sea temperature) is August (86.7°F).
The coldest month (with the lowest average sea temperature) is January (64.1°F).

Average daylight in May / Average sunshine in May - Longboat Key, FL
  • Average daylight in May: 13.5h

The month with the longest days is June (Average daylight: 13.9h).
The month with the shortest days is December (Average daylight: 10.4h).

  • Average sunshine in May: 11.1h

The month with the most sunshine is May (Average sunshine: 11.1h).
The month with the least sunshine is December (Average sunshine: 6.5h).

Average sunshine days in May - Longboat Key, FL
  • Average sunshine days in May: 14 days

The month with the most sunshine days is January (21.1 days).
The month with the least sunshine days is August (2.5 days).

Average UV index in May - Longboat Key, FL
  • Average UV index in May: 7

Months with the highest UV index are May, June, July, August and September (UV index 7).
The month with the lowest UV index is January (UV index 4).

Average cloud cover in May - Longboat Key, FL
  • Average cloud cover in May: 22

Months with the most cloud cover are January and December (Cloud cover 30).
The month with the least cloud cover is May (Cloud cover 22).

Average visibility in May - Longboat Key, FL
  • Average visibility in May: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).