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 snowfall days 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
Transitioning from April to May, San Antonio observes an average high-temperature of a tropical 86.4°F (30.2°C), differing subtly from the previous month. Throughout May, San Antonio witnesses a nighttime temperature average of 68.2°F (20.1°C).Heat index
The heat index for May is calculated to be a sweltering 96.8°F (36°C). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.Know that the heat index computations account for shaded terrains and slight winds. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
The body's innate mechanism to counteract overheating is through perspiration, as it leverages the cooling effects of sweat evaporation. An increase in relative humidity disrupts body cooling by slowing the evaporation rate, thereby reducing the rate at which the body cools and amplifying the sense of heat. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.
Humidity
In May, the average relative humidity is 73%.Rainfall
In San Antonio, in May, during 17.7 rainfall days, 3.54" (90mm) of precipitation is typically accumulated. Throughout the year, there are 200.6 rainfall days, and 40.39" (1026mm) of precipitation is accumulated.Snowfall
February through December are months without snowfall.Daylight
In San Antonio, the average length of the day in May is 13h and 34min.On the first day of the month, sunrise is at 6:47 am and sunset at 8:04 pm. On the last day of May, sunrise is at 6:32 am and sunset at 8:21 pm EDT.
Sunshine
In May, the average sunshine is 10.7h.UV index
The months with the highest UV index are May through July and September, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 7 in May interprets into the following recommendations:
Shun overexposure. Protection from sun ravages is indispensable. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in May?
What is the average humidity in May?
How much does it rain in May?
When it does not snow?
What is the average length of the day in May?
When is the sunrise / sunset in May?
How long on average sun shines in May in San Antonio?
When is the highest UV index?
How high is the UV index in May?
Average temperature in May
San Antonio, FL
- Average high temperature in May: 86.4°F
The warmest month (with the highest average high temperature) is August (90.1°F).
The month with the lowest average high temperature is January (67.6°F).
- Average low temperature in May: 68.2°F
The month with the highest average low temperature is August (76.3°F).
The coldest month (with the lowest average low temperature) is January (50.2°F).
Average pressure in May
San Antonio, FL
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is September (29.96"Hg).
Average wind speed in May
San Antonio, FL
- Average wind speed in May: 5.8mph
The windiest months (with the highest average wind speed) are March and April (6.5mph).
The calmest month (with the lowest average wind speed) is July (4.5mph).
Average humidity in May
San Antonio, FL
- Average humidity in May: 73%
The months with the highest relative humidity are August and September (79%).
The month with the lowest relative humidity is March (72%).
Average rainfall in May
San Antonio, FL
- Average rainfall in May: 3.54"
The wettest month (with the highest rainfall) is August (7.17").
The driest months (with the least rainfall) are February, March and November (1.42").
Average rainfall days in May
San Antonio, FL
- Average rainfall days in May: 17.7 days
The month with the highest number of rainy days is August (28.8 days).
The month with the least rainy days is December (9.5 days).
Average snowfall days in May
San Antonio, FL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in May /
Average sunshine in May
San Antonio, FL
- Average daylight in May: 13h and 4min
The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).
- Average sunshine in May: 10h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).
Average sunshine days in May
San Antonio, FL
- Average sunshine days in May: 11.2 days
The month with the most sunshine days is January (18.9 days).
The month with the least sunshine days is August (0.8 days).
Average UV index in May
San Antonio, FL
- Average UV index in May: 7
The months with the highest UV index are May, June, July and September (UV index 7).
The month with the lowest UV index is January (UV index 4).
Average cloud cover in May
San Antonio, FL
- Average cloud cover in May: 27
The months with the most cloud cover are February and December (Cloud cover 35).
The month with the least cloud cover is May (Cloud cover 27).
Average visibility in May
San Antonio, 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).
San Antonio, Florida, USA
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