May weather forecast
Lisbon, FL

The last month of the spring, May, is a tropical month in Lisbon, Florida, with an average temperature ranging between max 86.2°F (30.1°C) and min 67.8°F (19.9°C).

Temperature

Lisbon's shift into May sets the average high-temperature at a tropical 86.2°F (30.1°C), a figure that deviates only slightly from April's 82°F (27.8°C). Lisbon's nighttime temperature during May is consistently averaged at a refreshing 67.8°F (19.9°C).

Heat index

May's heat index is appraised at a torrid 96.8°F (36°C). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.
Understand that the heat index values take into account shaded locations and mild winds. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', combines both the air temperature and the humidity level to give a perceived human temperature. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

In May, the average relative humidity is 73%.

Rainfall

In May, the rain falls for 17.3 days. Throughout May, 3.58" (91mm) of precipitation is accumulated. Throughout the year, there are 200.1 rainfall days, and 39.06" (992mm) of precipitation is accumulated.

Daylight

In May, the average length of the day is 13h and 36min.
On the first day of May, sunrise is at 6:45 am and sunset at 8:03 pm. On the last day of the month, sunrise is at 6:29 am and sunset at 8:20 pm EDT.

Sunshine

The months with the most sunshine are May and July, with an average of 10.7h of sunshine.

UV index

May through August, 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 risk from exposure to the Sun's UV rays for the average person.
Note: In May, a daily maximum UV index of 7 leads to the following instructions:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.