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 in May
- Average snowfall 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
Port Lavaca's weather in May shows a minor rise in the average high-temperature, moving slightly up from April's warm 77°F (25°C) to a still moderately hot 82.8°F (28.2°C). An average low-temperature of 72.3°F (22.4°C) marks the nights throughout May.Heat index
The average heat index in May is evaluated at a tropical 89.6°F (32°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.Records show heat index calculations are tailored for shaded regions and mild winds. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
Humidity
In Port Lavaca, the average relative humidity in May is 78%.Rainfall
In Port Lavaca, during May, the rain falls for 12.6 days and regularly aggregates up to 1.93" (49mm) of precipitation. Throughout the year, there are 156.8 rainfall days, and 23.5" (597mm) of precipitation is accumulated.Snowfall
In Port Lavaca, snow does not fall in February through December.Ocean temperature
In May, the average ocean temperature is 77.5°F (25.3°C).Note: Water temperatures in the range of 77°F (25°C) to 84.2°F (29°C) are warm and delightful, ensuring comfort during water activities over extended periods.
Daylight
The average length of the day in May is 13h and 35min.On the first day of May, sunrise is at 6:44 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 6:28 am and sunset at 8:19 pm CDT.
Sunshine
In May, the average sunshine is 9.7h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 7 during May translates into the following guidance:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Take heed! Reflections of sand and water make the Sun's UV rays stronger.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during May?
What is the average humidity in May?
How many days does it rain in May?
When it does not snow?
What is the water temperature in May?
How many hours of daylight does Port Lavaca have in May?
When is the sunrise / sunset in May?
How many hours of sunshine does Port Lavaca have in May?
What is the month with the highest UV index?
What is the UV index intensity in May?
Average temperature in May
Port Lavaca, TX
- Average high temperature in May: 82.8°F
The warmest month (with the highest average high temperature) is August (90.7°F).
The month with the lowest average high temperature is January (62.2°F).
- Average low temperature in May: 72.3°F
The month with the highest average low temperature is August (79.3°F).
The coldest month (with the lowest average low temperature) is January (49.6°F).
Average pressure in May
Port Lavaca, TX
- Average pressure in May: 29.92"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Port Lavaca, TX
- Average wind speed in May: 11mph
The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is September (8.3mph).
Average humidity in May
Port Lavaca, TX
- Average humidity in May: 78%
The months with the highest relative humidity are February and March (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
Port Lavaca, TX
- Average rainfall in May: 1.93"
The wettest month (with the highest rainfall) is September (3.35").
The driest month (with the least rainfall) is February (0.87").
Average rainfall days in May
Port Lavaca, TX
- Average rainfall days in May: 12.6 days
The month with the highest number of rainy days is September (19.8 days).
The month with the least rainy days is January (10.8 days).
Average snowfall in May
Port Lavaca, TX
- Average snowfall in May: 0"
The month with the highest snowfall is January (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in May
Port Lavaca, TX
- Average snowfall days in May: 0 days
The months with the highest number of snowfall days are January and December (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).
Average sea temperature in May
Port Lavaca, TX
- Average sea temperature in May: 77.5°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 (60.1°F).
Average daylight in May /
Average sunshine in May
Port Lavaca, TX
- 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: 9h 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: 4h and 42min).
Average sunshine days in May
Port Lavaca, TX
- Average sunshine days in May: 15.3 days
The month with the most sunshine days is January (17.5 days).
The month with the least sunshine days is September (8.5 days).
Average UV index in May
Port Lavaca, TX
- Average UV index in May: 7
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 4).
Average cloud cover in May
Port Lavaca, TX
- Average cloud cover in May: 36
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in May
Port Lavaca, TX
- 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).
Port Lavaca, Texas, USA
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