May weather forecast
Deltona, FL

In May, Deltona starts to experience a typical subtropical climate with increased temperatures and rainfall. However, the bright side of a rise in rain precipitation is the splash of greenery that it ushers in, rendering the city buzzingly vibrant. Despite the rise in precipitation, there is a significant increase in sunshine hours that provide residents ample time for outdoor ventures. May evidences an increased rise in the average high temperature, peaking at 85.1°F (29.5°C) while the rainfall also sees a jump, recording at 3.39" (86mm). This month signifies the onset of summer in Deltona.

Temperature

Deltona's shift from April to May is accompanied by an average high-temperature of a still moderately hot 85.1°F (29.5°C), a slight deviation from 81.3°F (27.4°C). During May, Deltona experiences an average low-temperature of 68.9°F (20.5°C) at night.

Heat index

The average heat index in May is calculated to be a very hot 95°F (35°C). Take more preventive steps, risk of heat exhaustion and heat cramps is elevated. Long activity may culminate in heatstroke.
Know that the heat index computations account for shaded terrains and slight winds. 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 'apparent temperature', measures the perceived warmth when incorporating the humidity present in the air. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When there is an excess of moisture in the atmosphere, the efficiency of the evaporation process is lessened, leading to less efficient body cooling and a sensation of overheating. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In May, the average relative humidity is 73%.

Rainfall

In May, the rain falls for 16 days. Throughout May, 3.39" (86mm) of precipitation is accumulated. Throughout the year, there are 196.6 rainfall days, and 36.54" (928mm) of precipitation is accumulated.

Snowfall

February through December are months without snowfall.

Daylight

In May, the average length of the day in Deltona is 13h and 36min.
On the first day of the month, sunrise is at 6:43 am and sunset at 8:01 pm. On the last day of May, sunrise is at 6:26 am and sunset at 8:18 pm EDT.

Sunshine

In May, the average sunshine is 10.7h.

UV index

May through August, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for average individuals.
Note: The UV index of 7 during May translates into the following guidance:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.