Saint Petersburg
Florida, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Saint Petersburg, FL

Scenic palm trees and a straight road to St. Petersburg in Florida, a beautiful clear waterfront, on a hot and sunny day with cloudy sky
Scenic palm trees and a straight road to St. Petersburg in Florida, a beautiful clear waterfront, on a hot and sunny day with cloudy sky
The last month of the spring, May, is a tropical month in Saint Petersburg, Florida, with temperature in the range of an average high of 86°F (30°C) and an average low of 70°F (21.1°C).

Temperature

In May, the average high-temperature is almost the same as in April - a tropical 86°F (30°C). The average low-temperature, in Saint Petersburg, is 70°F (21.1°C).

Rainfall

In Saint Petersburg, it is raining for 6 days, with typically 2.6" (66mm) of accumulated precipitation. Throughout the year, there are 105 rainfall days, and 45.9" (1165.8mm) of precipitation is accumulated.

Ocean temperature

In May, the average ocean temperature is 78.1°F (25.6°C).
Note: For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

The average length of the day in Saint Petersburg is 13.5h.

Sunshine

Months with the most sunshine in Saint Petersburg are April and May, with an average of 10h of sunshine.

UV index

Months with the highest UV index in Saint Petersburg are May through August, with an average maximum UV index of 11. A UV Index estimate of 11, and higher, represents an excessive health risk from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In May, the average maximum UV index of 11 translate into the following recommendations:
Practice all essential precautions. Protection against sun damage is crucial. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What is the temperature in May in Saint Petersburg?

The average high-temperature, in May, in Saint Petersburg, Florida, is 86°F (30°C), while the average low-temperature is 70°F (21.1°C).

How much does it rain in Saint Petersburg in May?

In May, in Saint Petersburg, Florida, the rain falls for 6 days. Throughout May, 2.6" (66mm) of precipitation is accumulated.

How warm is the water in May in Saint Petersburg?

In Saint Petersburg, Florida, in May, the average water temperature is 78.1°F (25.6°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 Saint Petersburg have in May?

In Saint Petersburg, the average length of the day in May is 13.5h.

What are the months with the most sunshine in Saint Petersburg?

April and May, with an average of 10h of sunshine, are months with the most sunshine.

How long on average sun shines in May in Saint Petersburg?

The average sunshine in May in Saint Petersburg, Florida, is 10h.

What is the month with the highest UV index in Saint Petersburg?

Months with the highest UV index in Saint Petersburg, Florida, are May through August, with an average maximum UV index of 11.

What is the UV index reading in May in Saint Petersburg?

The average daily maximum UV index in May in Saint Petersburg, Florida, is 11. A UV Index value of 11, and more, symbolizes an excessive health risk from the exposure to the Sun's UV rays.
Average temperature in May - Saint Petersburg, FL
  • Average high temperature in May: 86°F

Warmest months (with the highest average high temperature) are July and August (90°F).
The month with the lowest average high temperature is January (70°F).

  • Average low temperature in May: 70°F

Months with the highest average low temperature are July and August (76°F).
The coldest month (with the lowest average low temperature) is January (53°F).

Average rainfall in May - Saint Petersburg, FL
  • Average rainfall in May: 2.6"

The wettest month (with the highest rainfall) is August (7.8").
The driest month (with the lowest rainfall) is April (1.6").

Average rainfall days in May - Saint Petersburg, FL
  • Average rainfall days in May: 6 days

The month with the highest number of rainy days is August (17 days).
The month with the lowest number of rainy days is April (4 days).

Average sea temperature in May - Saint Petersburg, FL
  • Average sea temperature in May: 78.2°F

The best month for swimming (with the highest average sea temperature) is August (86.7°F).
The coldest month (with the lowest average sea temperature) is January (64°F).

Average daylight in May / Average sunshine in May - Saint Petersburg, FL
  • Average daylight in May: 13.5h

The month with the longest days is June (Average daylight: 13.9h).
The month with shortest days is December (Average daylight: 10.4h).

  • Average sunshine in May: 10h

Months with most sunshine are April and May (Average sunshine: 10h).
The month with least sunshine is December (Average sunshine: 6h).

Average UV index in May - Saint Petersburg, FL
  • Average UV index in May: 11

Months with the highest UV index are May, June, July and August (UV index 11).
Months with the lowest UV index are January and December (UV index 5).