Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average sea temperature in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
The average high-temperature for May is a still moderately hot 82.9°F (28.3°C), closely aligning with the temperature of the preceding month. Nighttime temperature reflects an average dip to a still moderately hot 76.6°F (24.8°C) in May, subtly cooler than its daytime highs.Heat index
May's heat index is estimated at a hot 87.8°F (31°C). Enduring exposure and ongoing activity could cause a sense of fatigue and subsequent heat cramps.Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
Humidity
In Surfside, the average relative humidity in May is 71%.Rainfall
In Surfside, during May, the rain falls for 14.5 days and regularly aggregates up to 1.57" (40mm) of precipitation. Throughout the year, there are 166.7 rainfall days, and 12.91" (328mm) of precipitation is accumulated.Ocean temperature
In Surfside, the average seawater temperature in May is 81.1°F (27.3°C).Note: Water temperature between 77°F (25°C) and 84.2°F (29°C) provides warmth and pleasure, making water activities enjoyable for lengthened periods without feeling uncomfortable.
Daylight
The average length of the day in May is 13h and 25min.On the first day of the month, sunrise is at 6:42 am and sunset at 7:52 pm. On the last day of May, sunrise is at 6:28 am and sunset at 8:07 pm EDT.
Sunshine
In Surfside, the average sunshine in May is 10.7h.UV index
May through September, 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 threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index, 7 during May, leads to the following recommendations:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Alert! Sand and water increase UV exposure due to their reflective properties.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is May?
What is the average humidity in May?
How much does it rain in May?
What is the ocean temperature in May?
What is the average length of the day in May?
What time are sunrise and sunset in May?
How long on average sun shines in May?
When is the highest UV index?
What is the UV index intensity in May?
Average temperature in May
Surfside, FL
- Average high temperature in May: 82.9°F
The warmest month (with the highest average high temperature) is August (88°F).
The month with the lowest average high temperature is January (73.4°F).
- Average low temperature in May: 76.6°F
The month with the highest average low temperature is August (82°F).
The coldest month (with the lowest average low temperature) is January (64°F).
Average pressure in May
Surfside, FL
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are September and October (29.95"Hg).
Average wind speed in May
Surfside, FL
- Average wind speed in May: 9.9mph
The windiest month (with the highest average wind speed) is March (10.8mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).
Average humidity in May
Surfside, FL
- Average humidity in May: 71%
The month with the highest relative humidity is December (75%).
The month with the lowest relative humidity is March (69%).
Average rainfall in May
Surfside, FL
- Average rainfall in May: 1.57"
The wettest month (with the highest rainfall) is August (2.2").
The driest month (with the least rainfall) is January (0.39").
Average rainfall days in May
Surfside, FL
- Average rainfall days in May: 14.5 days
The month with the highest number of rainy days is September (21.3 days).
The month with the least rainy days is February (7.5 days).
Average sea temperature in May
Surfside, FL
- Average sea temperature in May: 81.1°F
The best month for swimming (with the highest average sea temperature) is August (86.5°F).
The coldest month (with the lowest average sea temperature) is February (74°F).
Average daylight in May /
Average sunshine in May
Surfside, FL
- Average daylight in May: 13h and 2min
The month with the longest days is June (Average daylight: 13h and 42min).
The month with the shortest days is December (Average daylight: 10h and 36min).
- Average sunshine in May: 10h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in May
Surfside, FL
- Average sunshine days in May: 12.3 days
The month with the most sunshine days is March (20 days).
The month with the least sunshine days is September (5.1 days).
Average UV index in May
Surfside, 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 months with the lowest UV index are January and December (UV index 5).
Average cloud cover in May
Surfside, FL
- Average cloud cover in May: 28
The month with the most cloud cover is October (Cloud cover 34).
The month with the least cloud cover is April (Cloud cover 26).
Average visibility in May
Surfside, 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).
Surfside, Florida, USA
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