May weather forecast
O'Brien, FL

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Weather in May

May, the last month of the spring in O'Brien, is a hot month, with temperature in the range of an average low of 65.8°F (18.8°C) and an average high of 86.4°F (30.2°C).

Temperature

As May sets, the average high-temperature shows a slight increase, moving up from a warm 80.2°F (26.8°C) in April to a tropical 86.4°F (30.2°C). An average minimum temperature of 65.8°F (18.8°C) is recorded during the month of May.

Heat index

Throughout May, the heat index is estimated at a torrid 96.8°F (36°C). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.
In terms of the heat index, values are set with light wind and shade conditions in mind. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

The least humid month is May, with an average relative humidity of 70%.

Rainfall

In O'Brien, in May, during 13.6 rainfall days, 2.4" (61mm) of precipitation is typically accumulated. Throughout the year, there are 173.7 rainfall days, and 30.83" (783mm) of precipitation is accumulated.

Snowfall

In O'Brien, snow does not fall in January, March through December.

Daylight

The average length of the day in May is 13h and 41min.
On the first day of May, sunrise is at 6:48 am and sunset at 8:09 pm. On the last day of the month, sunrise is at 6:31 am and sunset at 8:28 pm EDT.

Sunshine

In O'Brien, the average sunshine in May is 10.8h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: In May, the maximum UV index of 7 translates into these guidelines:
Inhibit overexposure. Warding off sun damage is of utmost importance. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Updated: Jul 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it hot during May?

The high-temperature during May is 86.4°F (30.2°C) and the low-temperature is 65.8°F (18.8°C). In May, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines air temperature and relative humidity, is estimated at 96.8°F (36°C).

What is the least humid month?

The least humid month is May, with an average relative humidity of 70%.

What is the average humidity in May?

The average relative humidity in May is 70%.

How much does it rain in May?

In O'Brien, during May, the rain falls for 13.6 days and regularly aggregates up to 2.4" (61mm) of precipitation.

When it does not snow?

January, March through December are months without snowfall.

How many hours of daylight does O'Brien have in May?

In O'Brien, the average day length in May is 13h and 41min.

When are sunrise and sunset in May?

In May, on the first day of the month, sunrise is at 6:48 am and sunset at 8:09 pm. On the last day of the month, sunrise is at 6:31 am and sunset at 8:28 pm EDT.

How long on average sun shines in May?

In May, the average sunshine duration is 10.8h.

When is the highest UV index?

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

How high is the UV index in May?

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

Average temperature in May
O'Brien, FL

Average temperature in May - O
  • Average high temperature in May: 86.4°F

The warmest months (with the highest average high temperature) are July and August (91.2°F).
The month with the lowest average high temperature is January (62.2°F).

  • Average low temperature in May: 65.8°F

The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (44.2°F).

Average pressure in May
O'Brien, FL

Average pressure in May - O
  • Average pressure in May: 30.01"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.98"Hg).

Average wind speed in May
O'Brien, FL

Average wind speed in May - O
  • Average wind speed in May: 5.7mph

The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).

Average humidity in May
O'Brien, FL

Average humidity in May - O
  • Average humidity in May: 70%

The months with the highest relative humidity are August and September (77%).
The month with the lowest relative humidity is May (70%).

Average rainfall in May
O'Brien, FL

Average rainfall in May - O
  • Average rainfall in May: 2.4"

The wettest month (with the highest rainfall) is August (4.53").
The driest month (with the least rainfall) is November (0.98").

Average rainfall days in May
O'Brien, FL

Average rainfall days in May - O
  • Average rainfall days in May: 13.6 days

The month with the highest number of rainy days is August (25.4 days).
The month with the least rainy days is November (7.1 days).

Average snowfall days in May
O'Brien, FL

Average snowfall days in May - O
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

Average daylight in May /
Average sunshine in May
O'Brien, FL

Average daylight in May / Average sunshine in May - O
  • Average daylight in May: 13h and 4min

The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).

  • Average sunshine in May: 10h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).

Average sunshine days in May
O'Brien, FL

Average sunshine days in May - O
  • Average sunshine days in May: 16.1 days

The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is August (4.2 days).

Average UV index in May
O'Brien, FL

Average UV index in May - O
  • Average UV index in May: 7

The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).

Average cloud cover in May
O'Brien, FL

Average cloud cover in May - O
  • Average cloud cover in May: 30

The month with the most cloud cover is December (Cloud cover 40).
The months with the least cloud cover are May and October (Cloud cover 30).

Average visibility in May
O'Brien, FL

Average visibility in May - O
  • Average visibility in May: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is December (5mi).

O'Brien, Florida, USA

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