May weather forecast
Saint Petersburg, FL

Beautiful clear waterfront, scenic palm trees, and a straight road to St. Petersburg in Florida
Beautiful clear waterfront, scenic palm trees, and a straight road to St. Petersburg in Florida

Weather in May

The last month of the spring, May, is also a moderately hot month in Saint Petersburg, Florida, with an average temperature varying between 84°F (28.9°C) and 72.7°F (22.6°C).

Temperature

In Saint Petersburg, the average high-temperature in May is relatively the same as in April - a still moderately hot 84°F (28.9°C). In Saint Petersburg, in May, the average low-temperature is 72.7°F (22.6°C).

Heat index

The average heat index in May is evaluated at a tropical 91.4°F (33°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'real feel', 'apparent temperature', or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like wind, metabolic differences, clothing, and activity influence one's weather impression. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

With an average relative humidity of 71%, May is the least humid month.

Rainfall

In May, in Saint Petersburg, Florida, the rain falls for 14.5 days. Throughout May, 2.09" (53mm) of precipitation is accumulated. Throughout the year, in Saint Petersburg, there are 172.1 rainfall days, and 27.2" (691mm) of precipitation is accumulated.

Ocean temperature

In May, the average ocean temperature is 78.1°F (25.6°C).
Note: For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

The average length of the day in May in Saint Petersburg, Florida, is 13h and 32min.
On the first day of the month, sunrise is at 6:50 am and sunset at 8:04 pm. On the last day of May, in Saint Petersburg, sunrise is at 6:35 am and sunset at 8:21 pm EDT.

Sunshine

May has the most sunshine of the year, with an average of 11.2h of sunshine.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in Saint Petersburg, Florida. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the ordinary person.
Note: In May, the average maximum UV index of 7 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for the 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. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
[Resources]

FAQ

What is the temperature in May in Saint Petersburg?

In Saint Petersburg, in May, the average high-temperature is 84°F (28.9°C), and the average low-temperature is 72.7°F (22.6°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines air temperature and relative humidity, in May is evaluated at 91.4°F (33°C).

What is the least humid month in Saint Petersburg?

May is the least humid month in Saint Petersburg, with an average relative humidity of 71%.

What is the average humidity in May in Saint Petersburg?

The average relative humidity in May in Saint Petersburg is 71%.

How many days does it rain in May in Saint Petersburg?

In May, in Saint Petersburg, the rain falls for 14.5 days. Throughout May, 2.09" (53mm) of precipitation is accumulated.

What is the water temperature in May in Saint Petersburg?

In May, the average ocean temperature is 78.1°F (25.6°C). 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.

How many hours of daylight does Saint Petersburg have in May?

In May, the average day length in Saint Petersburg is 13h and 32min.

What time are sunrise and sunset in May in Saint Petersburg?

On the first day of May in Saint Petersburg, Florida, sunrise is at 6:50 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 6:35 am and sunset at 8:21 pm EDT.

What month has the most sunshine in Saint Petersburg?

With an average of 11.2h of sunshine, May has the most sunshine of the year in Saint Petersburg, Florida.

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

In Saint Petersburg, the average sunshine duration in May is 11.2h.

When is the highest UV index in Saint Petersburg?

May through September, with an average maximum UV index of 7, are months with the highest UV index in Saint Petersburg, Florida.

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

The average daily maximum UV index in May in Saint Petersburg, Florida, is 7. A UV Index reading of 6 to 7 represents a high health threat from unprotected exposure to UV radiation.

Average temperature in May
Saint Petersburg, FL

Average temperature in May - Saint Petersburg, FL
  • Average high temperature in May: 84°F

The warmest month (with the highest average high temperature) is August (88.7°F).
The month with the lowest average high temperature is January (67.6°F).

  • Average low temperature in May: 72.7°F

The month with the highest average low temperature is August (79.5°F).
The coldest month (with the lowest average low temperature) is January (55.2°F).

[Resources]

Average pressure in May
Saint Petersburg, FL

Average pressure in May - Saint Petersburg, FL
  • Average pressure in May: 30.01"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.96"Hg).

[Resources]

Average wind speed in May
Saint Petersburg, FL

Average wind speed in May - Saint Petersburg, FL
  • Average wind speed in May: 7.9mph

The windiest months (with the highest average wind speed) are January, March, October and November (8.9mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).

[Resources]

Average humidity in May
Saint Petersburg, FL

Average humidity in May - Saint Petersburg, FL
  • Average humidity in May: 71%

The month with the highest relative humidity is December (76%).
The month with the lowest relative humidity is May (71%).

[Resources]

Average rainfall in May
Saint Petersburg, FL

Average rainfall in May - Saint Petersburg, FL
  • Average rainfall in May: 2.09"

The wettest month (with the highest rainfall) is July (5.24").
The driest months (with the least rainfall) are February and November (0.75").

[Resources]

Average rainfall days in May
Saint Petersburg, FL

Average rainfall days in May - Saint Petersburg, FL
  • Average rainfall days in May: 14.5 days

The month with the highest number of rainy days is July (26.2 days).
The month with the least rainy days is November (7 days).

[Resources]

Average sea temperature in May
Saint Petersburg, FL

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).

[Resources]

Average daylight in May /
Average sunshine in May
Saint Petersburg, FL

Average daylight in May / Average sunshine in May - Saint Petersburg, FL
  • Average daylight in May: 13h and 32min

The month with the longest days is June (Average daylight: 13h and 52min).
The month with the shortest days is December (Average daylight: 10h and 25min).

  • Average sunshine in May: 11h and 12min

The month with the most sunshine is May (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).

[Resources]

Average sunshine days in May
Saint Petersburg, FL

Average sunshine days in May - Saint Petersburg, FL
  • Average sunshine days in May: 13.9 days

The month with the most sunshine days is January (22.1 days).
The month with the least sunshine days is July (3.1 days).

[Resources]

Average UV index in May
Saint Petersburg, FL

Average UV index in May - Saint Petersburg, FL
  • Average UV index in May: 7

The months with the highest UV index are May, June, July, August and September (UV index 7).
The month with the lowest UV index is January (UV index 4).

[Resources]

Average cloud cover in May
Saint Petersburg, FL

Average cloud cover in May - Saint Petersburg, FL
  • Average cloud cover in May: 21

The month with the most cloud cover is December (Cloud cover 30).
The month with the least cloud cover is May (Cloud cover 21).

[Resources]

Average visibility in May
Saint Petersburg, FL

Average visibility in May - Saint Petersburg, FL
  • Average visibility in May: 6mi

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

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location