May weather forecast
St. Augustine, FL

Palm trees and colorful houses in front of water fountains in a popular town square in St. Augustine, Florida
Palm trees and colorful houses in front of water fountains in a popular town square in St. Augustine, Florida

Weather in May

May, the last month of the spring in St. Augustine, is also a moderately hot month, with an average temperature ranging between min 64.9°F (18.3°C) and max 84°F (28.9°C).

Temperature

In May, the average high-temperature in St. Augustine, Florida, marginally rises from 78.1°F (25.6°C) in April to a still moderately hot 84°F (28.9°C). In St. Augustine, the average low-temperature is 64.9°F (18.3°C).

Rainfall

In May, in St. Augustine, the rain falls for 8 days. Throughout May, 3.11" (79mm) of precipitation is accumulated. Throughout the year, in St. Augustine, there are 116 rainfall days, and 50" (1270mm) of precipitation is accumulated.

Ocean temperature

In St. Augustine, the average seawater temperature in May is 75.7°F (24.3°C).
Note: For individuals prone to feeling cold, swimming in 73.4°F (23°C) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 75.7°F (24.3°C).

Daylight

The average length of the day in May in St. Augustine is 13h and 40min.
On the first day of the month, sunrise is at 6:42 am and sunset at 8:02 pm. On the last day of May, in St. Augustine, Florida, sunrise is at 6:25 am and sunset at 8:20 pm EDT.

Sunshine

March through August, with an average of 9h of sunshine, are months with the most sunshine in St. Augustine.

UV index

In St. Augustine, Florida, the average daily maximum UV index in May is 10. A UV Index estimate of 8 to 10 represents a very high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: In May, the average maximum UV index of 10 translate into the following recommendations:
Take extra precautions. Protection against sun damage is required. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the temperature in May in St. Augustine?

The average high-temperature, in May, in St. Augustine, Florida, is 84°F (28.9°C), while the average low-temperature is 64.9°F (18.3°C).

How many days does it rain in May in St. Augustine?

In St. Augustine, Florida, in May, during 8 rainfall days, 3.11" (79mm) of precipitation is typically accumulated.

What is the water temperature in May in St. Augustine?

In St. Augustine, Florida, in May, the average water temperature is 75.7°F (24.3°C). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 75.7°F (24.3°C) water may be enjoyable.

How many hours of daylight does St. Augustine have in May?

In May, the average day length is 13h and 40min.

When is the sunrise / sunset in May in St. Augustine?

On the first day of May in St. Augustine, Florida, sunrise is at 6:42 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 6:25 am and sunset at 8:20 pm EDT.

What is the month with the most sunshine in St. Augustine?

The months with the most sunshine in St. Augustine, Florida, are March through August, with an average of 9h of sunshine.

How long on average sun shines in May in St. Augustine?

The average sunshine duration in May is 9h.

What is the UV index reading in May in St. Augustine?

In St. Augustine, Florida, the average daily maximum UV index in May is 10. A UV Index estimate of 8 to 10 represents a very high hazard to health from unprotected exposure to UV radiation.
Average rainfall days
Average sunshine
Average UV index

Average temperature in May
St. Augustine, FL

Average temperature in May - St. Augustine, FL
  • Average high temperature in May: 84°F

The warmest month (with the highest average high temperature) is July (90°F).
The month with the lowest average high temperature is January (66°F).

  • Average low temperature in May: 65°F

The month with the highest average low temperature is August (73°F).
The coldest month (with the lowest average low temperature) is January (46°F).

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Average rainfall in May
St. Augustine, FL

Average rainfall in May - St. Augustine, FL
  • Average rainfall in May: 3.1"

The wettest month (with the highest rainfall) is September (7.5").
The driest month (with the least rainfall) is November (2.3").

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Average rainfall days in May
St. Augustine, FL

Average rainfall days in May - St. Augustine, FL
  • Average rainfall days in May: 8 days

The months with the highest number of rainy days are July and August (15 days).
The month with the least rainy days is April (6 days).

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Average sea temperature in May
St. Augustine, FL

Average sea temperature in May - St. Augustine, FL
  • Average sea temperature in May: 75.8°F

The best month for swimming (with the highest average sea temperature) is August (83.8°F).
The coldest months (with the lowest average sea temperature) are January and February (64.3°F).

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Average daylight in May /
Average sunshine in May
St. Augustine, FL

Average daylight in May / Average sunshine in May - St. Augustine, FL
  • Average daylight in May: 13h and 40min

The month with the longest days is June (Average daylight: 14h and 2min).
The month with the shortest days is December (Average daylight: 10h and 16min).

  • Average sunshine in May: 9h

The months with the most sunshine are March, April, May, June, July and August (Average sunshine: 9h).
The month with the least sunshine is December (Average sunshine: 6h).

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Average UV index in May
St. Augustine, FL

Average UV index in May - St. Augustine, FL
  • Average UV index in May: 10

The months with the highest UV index are June and July (UV index 11).
The months with the lowest UV index are January and December (UV index 4).

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