May weather forecast
Iona, FL

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Weather in May

The last month of the spring, May, is another warm month in Iona, Florida, with an average temperature varying between 73°F (22.8°C) and 84.7°F (29.3°C).

Temperature

Iona experiences an average high-temperature of a still moderately hot 84.7°F (29.3°C) in May, marking an insignificant shift from 81.1°F (27.3°C) in April. In Iona, the nighttime temperature averages to an agreeable 73°F (22.8°C) during May.

Heat index

The heat index value during May is evaluated at a hot 93.2°F (34°C). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
When assessing, remember that heat index measurements are for light winds and shaded spots. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', evaluates the perceived heat by adding the effect of moisture in the air. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.

Humidity

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

Rainfall

In Iona, Florida, during May, the rain falls for 14.4 days and regularly aggregates up to 1.65" (42mm) of precipitation. In Iona, during the entire year, the rain falls for 156.4 days and collects up to 17.95" (456mm) of precipitation.

Ocean temperature

In May, the average ocean temperature is 79.3°F (26.3°C).
Note: In water activities such as swimming and diving, temperatures from 77°F (25°C) to 84.2°F (29°C) are deemed highly pleasurable for extended periods without any unease.

Daylight

In Iona, the average length of the day in May is 13h and 28min.
On the first day of the month, sunrise is at 6:49 am and sunset at 8:00 pm. On the last day of May, sunrise is at 6:34 am and sunset at 8:16 pm EDT.

Sunshine

In Iona, Florida, the average sunshine in May is 10.9h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: The UV index of 7 during May leads to these advisories:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Be vigilant! The Sun's UV rays get a boost from sand and water reflections.
Updated: Aug 11, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is May?

The average high-temperature and low-temperature during May are 84.7°F (29.3°C) and 73°F (22.8°C) respectively. The average heat index (a.k.a. 'real feel', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in May is evaluated at 93.2°F (34°C).

What is the average humidity in May?

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

How much does it rain in May?

In Iona, in May, it is raining for 14.4 days, with typically 1.65" (42mm) of accumulated precipitation.

What is the water temperature in May?

In May, the average ocean temperature is 79.3°F (26.3°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 Iona have in May?

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

When is the sunrise / sunset in May?

On the first day of May, sunrise is at 6:49 am and sunset at 8:00 pm. On the last day of the month, sunrise is at 6:34 am and sunset at 8:16 pm EDT.

How long on average sun shines in May?

The average sunshine duration in May in Iona is 10.9h.

When is the highest UV index?

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

What is the UV index intensity in May?

In Iona, the average daily maximum UV index in May is 7. A UV Index estimate of 6 to 7 represents a high health risk 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
Iona, FL

Average temperature in May - Iona, FL
  • Average high temperature in May: 84.7°F

The warmest month (with the highest average high temperature) is August (88.9°F).
The month with the lowest average high temperature is January (70.7°F).

  • Average low temperature in May: 73°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 (57.7°F).

Average pressure in May
Iona, FL

Average pressure in May - Iona, 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).

Average wind speed in May
Iona, FL

Average wind speed in May - Iona, FL
  • Average wind speed in May: 7.7mph

The windiest month (with the highest average wind speed) is October (8.7mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).

Average humidity in May
Iona, FL

Average humidity in May - Iona, FL
  • Average humidity in May: 72%

The months with the highest relative humidity are September and December (76%).
The month with the lowest relative humidity is March (71%).

Average rainfall in May
Iona, FL

Average rainfall in May - Iona, FL
  • Average rainfall in May: 1.65"

The wettest month (with the highest rainfall) is August (3.94").
The driest months (with the least rainfall) are February and March (0.43").

Average rainfall days in May
Iona, FL

Average rainfall days in May - Iona, FL
  • Average rainfall days in May: 14.4 days

The month with the highest number of rainy days is August (24 days).
The month with the least rainy days is February (6.2 days).

Average sea temperature in May
Iona, FL

Average sea temperature in May - Iona, FL
  • Average sea temperature in May: 79.4°F

The best month for swimming (with the highest average sea temperature) is August (86.8°F).
The coldest month (with the lowest average sea temperature) is January (67°F).

Average daylight in May /
Average sunshine in May
Iona, FL

Average daylight in May / Average sunshine in May - Iona, 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 5min

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).

Average sunshine days in May
Iona, FL

Average sunshine days in May - Iona, FL
  • Average sunshine days in May: 13.4 days

The month with the most sunshine days is January (22.8 days).
The month with the least sunshine days is August (5.3 days).

Average UV index in May
Iona, FL

Average UV index in May - Iona, 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 month with the lowest UV index is January (UV index 4).

Average cloud cover in May
Iona, FL

Average cloud cover in May - Iona, FL
  • Average cloud cover in May: 24

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 24).

Average visibility in May
Iona, FL

Average visibility in May - Iona, 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).

Iona, Florida, USA

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