May weather forecast
Harlingen, TX

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Weather in May

May, the last month of the spring in Harlingen, is a hot month, with an average temperature fluctuating between 73.2°F (22.9°C) and 88.3°F (31.3°C).

Temperature

With the start of May, Harlingen measures an average high-temperature of a hot 88.3°F (31.3°C), not significantly differing from April's 84.7°F (29.3°C). In Harlingen, the average temperature during the nights of May drops to an agreeable 73.2°F (22.9°C).

Heat index

The heat index in May is calculated to be a torrid 102.2°F (39°C). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', offers an insight into how hot it feels when we factor in moisture content. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. 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.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. 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. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

The most humid month is May, with an average relative humidity of 73%.

Rainfall

In Harlingen, in May, during 6.8 rainfall days, 0.39" (10mm) of precipitation is typically accumulated. In Harlingen, during the entire year, the rain falls for 79.8 days and collects up to 5.24" (133mm) of precipitation.

Snowfall

In Harlingen, Texas, snow does not fall in January, March through December.

Daylight

The average length of the day in May in Harlingen is 13h and 26min.
On the first day of May in Harlingen, Texas, sunrise is at 6:52 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 8:18 pm CDT.

Sunshine

In May, the average sunshine is 10.2h.

UV index

The average daily maximum UV index in May is 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: A typical high UV index of 7 in May suggests the following recommendations:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. During bright days, sunglasses that offer UVA and UVB defense are recommended.
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Frequently asked questions

How hot does it get in Harlingen in May?

In May, the average high-temperature and low-temperature are 88.3°F (31.3°C) and 73.2°F (22.9°C) respectively. In May, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, is calculated to be 102.2°F (39°C).

What is the most humid month in Harlingen?

With an average relative humidity of 73%, May is the most humid month.

What is the average humidity in May in Harlingen?

The average relative humidity in May in Harlingen is 73%.

How much does it rain in Harlingen in May?

In Harlingen, Texas, during May, the rain falls for 6.8 days and regularly aggregates up to 0.39" (10mm) of precipitation.

When it does not snow in Harlingen?

In Harlingen, Texas, snow does not fall in January, March through December.

How many hours of daylight does Harlingen have in May?

In May, the average day length in Harlingen, Texas, is 13h and 26min.

When are sunrise and sunset in May in Harlingen?

In May, on the first day of the month, sunrise is at 6:52 am and sunset at 8:02 pm. On the last day of the month, in Harlingen, sunrise is at 6:38 am and sunset at 8:18 pm CDT.

How many hours of sunshine does Harlingen have in May?

The average sunshine duration in May is 10.2h.

How high is the UV index in May in Harlingen?

The average daily maximum UV index in May is 7. A UV Index reading of 6 to 7 represents a high health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Harlingen, TX

Average temperature in May - Harlingen, TX
  • Average high temperature in May: 88.3°F

The warmest month (with the highest average high temperature) is August (95°F).
The month with the lowest average high temperature is January (68.7°F).

  • Average low temperature in May: 73.2°F

The month with the highest average low temperature is August (80.1°F).
The coldest month (with the lowest average low temperature) is January (55.4°F).

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Average pressure in May
Harlingen, TX

Average pressure in May - Harlingen, TX
  • Average pressure in May: 29.88"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

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Average wind speed in May
Harlingen, TX

Average wind speed in May - Harlingen, TX
  • Average wind speed in May: 11.9mph

The windiest months (with the highest average wind speed) are March and April (12.1mph).
The calmest month (with the lowest average wind speed) is September (8.9mph).

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Average humidity in May
Harlingen, TX

Average humidity in May - Harlingen, TX
  • Average humidity in May: 73%

The month with the highest relative humidity is May (73%).
The month with the lowest relative humidity is August (65%).

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Average rainfall in May
Harlingen, TX

Average rainfall in May - Harlingen, TX
  • Average rainfall in May: 0.39"

The wettest month (with the highest rainfall) is July (0.87").
The driest month (with the least rainfall) is February (0.16").

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Average rainfall days in May
Harlingen, TX

Average rainfall days in May - Harlingen, TX
  • Average rainfall days in May: 6.8 days

The month with the highest number of rainy days is September (11.5 days).
The month with the least rainy days is February (4.7 days).

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Average snowfall days in May
Harlingen, TX

Average snowfall days in May - Harlingen, TX
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

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Average daylight in May /
Average sunshine in May
Harlingen, TX

Average daylight in May / Average sunshine in May - Harlingen, TX
  • Average daylight in May: 13h and 2min

The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).

  • Average sunshine in May: 10h and 1min

The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).

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Average sunshine days in May
Harlingen, TX

Average sunshine days in May - Harlingen, TX
  • Average sunshine days in May: 22.7 days

The month with the most sunshine days is March (23.3 days).
The month with the least sunshine days is September (15.6 days).

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Average UV index in May
Harlingen, TX

Average UV index in May - Harlingen, TX
  • Average UV index in May: 7

The month with the highest UV index is July (UV index 8).
The month with the lowest UV index is December (UV index 4).

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Average cloud cover in May
Harlingen, TX

Average cloud cover in May - Harlingen, TX
  • Average cloud cover in May: 32

The month with the most cloud cover is December (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 18).

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Average visibility in May
Harlingen, TX

Average visibility in May - Harlingen, 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).

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Harlingen, Texas, USA

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