May weather forecast
Largo, FL

The month of May marks the official start of summer in Largo, Florida, USA, with a dramatic rise in temperatures and humidity levels. The frequency of rainfall also increases, reaching an average of 0.91" (23mm). As the temperatures reach an average high of 82°F (27.8°C), the sunny hours also peak, providing the longest daylight hours so far in the year. The strong winds of the earlier months grow subtler, adding to the warmth that defines the month of May. As the city moves from May to June, it braces for the most humid and rain-packed period of the year.

Temperature

With the transition into May, Largo notes an average high-temperature of a still moderately hot 82°F (27.8°C), closely resembling April. May records a small disparity from daytime temperatures, marking an average low-temperature of 73°F (22.8°C).

Heat index

In May, the heat index is estimated at a hot 87.8°F (31°C). Exposure and extended activity could potentially cause a state of fatigue and lead to heat cramps.
Consider that heat index readings are for situations in the shade and light wind. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', joins air temperature with relative humidity to produce a temperature perception for humans. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.

Humidity

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

Rainfall

In Largo, in May, during 11.8 rainfall days, 0.91" (23mm) of precipitation is typically accumulated. In Largo, during the entire year, the rain falls for 149.9 days and collects up to 16.18" (411mm) of precipitation.

Daylight

In May, the average length of the day is 13h and 32min.
On the first day of the month, sunrise is at 6:50 am and sunset at 8:05 pm. On the last day of May, sunrise is at 6:35 am and sunset at 8:22 pm EDT.

Sunshine

The month with the most sunshine is May, with an average of 11.3h 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 value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum high UV index of 7 in May translates into the following recommendations:
Deter overexposure. Protecting against the sun's effects is essential. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.