May weather forecast
Cayo Costa, FL

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Weather in May

The last month of the spring, May, is another warm month in Cayo Costa, Florida, with an average temperature fluctuating between 74.3°F (23.5°C) and 83.1°F (28.4°C).

Temperature

May's beginning signals an average high-temperature of a still warm 83.1°F (28.4°C), barely different from April's 79.5°F (26.4°C). A slight dip in temperature to a still moderately hot 74.3°F (23.5°C) marks the average nights in Cayo Costa, Florida, during May.

Heat index

The heat index for May is evaluated at a hot 89.6°F (32°C). With prolonged exposure and constant activity, one might feel exhausted and experience heat cramps.
Heat index readings emphasize conditions of light breezes and shaded spots. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.

Humidity

In May, the average relative humidity is 73%.

Rainfall

In May, the rain falls for 9.3 days. Throughout May, 0.63" (16mm) of precipitation is accumulated. In Cayo Costa, during the entire year, the rain falls for 122 days and collects up to 8.98" (228mm) of precipitation.

Daylight

In Cayo Costa, the average length of the day in May is 13h and 28min.
On the first day of May, sunrise is at 6:50 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 6:35 am and sunset at 8:17 pm EDT.

Sunshine

The month with the most sunshine in Cayo Costa is May, with an average of 11.1h of sunshine.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: A daily maximum UV index of 7 in May translates into the following instructions:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
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Frequently asked questions

How hot is it in Cayo Costa in May?

The average high-temperature and low-temperature in Cayo Costa, Florida, during May are 83.1°F (28.4°C) and 74.3°F (23.5°C) respectively. In May, the average heat index (a.k.a. 'real feel', 'feels like'), which combines relative humidity and air temperature, is evaluated at 89.6°F (32°C).

What is the average humidity in May in Cayo Costa?

In Cayo Costa, the average relative humidity in May is 73%.

How many days does it rain in May in Cayo Costa?

In Cayo Costa, in May, during 9.3 rainfall days, 0.63" (16mm) of precipitation is typically accumulated.

What is the average length of the day in May in Cayo Costa?

The average day length in May is 13h and 28min.

When is the sunrise / sunset in May in Cayo Costa?

In May, on the first day of the month, sunrise is at 6:50 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 6:35 am and sunset at 8:17 pm EDT.

What month has the most sunshine in Cayo Costa?

With an average of 11.1h of sunshine, May has the most sunshine of the year in Cayo Costa.

How long on average sun shines in May in Cayo Costa?

In May, the average sunshine duration in Cayo Costa is 11.1h.

When is the highest UV index in Cayo Costa?

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

What is the UV index reading in May in Cayo Costa?

In Cayo Costa, Florida, the average daily maximum UV index in May is 7. A UV Index estimate of 6 to 7 represents a high health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Cayo Costa, FL

Average temperature in May - Cayo Costa, FL
  • Average high temperature in May: 83.1°F

The warmest month (with the highest average high temperature) is August (88°F).
The month with the lowest average high temperature is January (70°F).

  • Average low temperature in May: 74.3°F

The month with the highest average low temperature is August (81°F).
The coldest month (with the lowest average low temperature) is January (58.8°F).

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Average pressure in May
Cayo Costa, FL

Average pressure in May - Cayo Costa, FL
  • Average pressure in May: 30"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is September (29.95"Hg).

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Average wind speed in May
Cayo Costa, FL

Average wind speed in May - Cayo Costa, FL
  • Average wind speed in May: 8.5mph

The windiest months (with the highest average wind speed) are October and November (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.9mph).

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Average humidity in May
Cayo Costa, FL

Average humidity in May - Cayo Costa, FL
  • Average humidity in May: 73%

The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is March (72%).

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Average rainfall in May
Cayo Costa, FL

Average rainfall in May - Cayo Costa, FL
  • Average rainfall in May: 0.63"

The wettest month (with the highest rainfall) is August (1.93").
The driest month (with the least rainfall) is March (0.16").

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Average rainfall days in May
Cayo Costa, FL

Average rainfall days in May - Cayo Costa, FL
  • Average rainfall days in May: 9.3 days

The month with the highest number of rainy days is September (19.5 days).
The month with the least rainy days is February (4.1 days).

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Average daylight in May /
Average sunshine in May
Cayo Costa, FL

Average daylight in May / Average sunshine in May - Cayo Costa, 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: 11h and 1min

The month with the most sunshine is May (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).

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Average sunshine days in May
Cayo Costa, FL

Average sunshine days in May - Cayo Costa, FL
  • Average sunshine days in May: 18.3 days

The month with the most sunshine days is January (25.1 days).
The month with the least sunshine days is September (7.2 days).

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Average UV index in May
Cayo Costa, FL

Average UV index in May - Cayo Costa, 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).

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Average cloud cover in May
Cayo Costa, FL

Average cloud cover in May - Cayo Costa, FL
  • Average cloud cover in May: 23

The month with the most cloud cover is January (Cloud cover 29).
The months with the least cloud cover are March and May (Cloud cover 23).

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Average visibility in May
Cayo Costa, FL

Average visibility in May - Cayo Costa, 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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Cayo Costa, Florida, USA

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