May weather forecast
Rio Grande City, TX

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Weather in May

May, the last month of the spring in Rio Grande City, is another tropical month, with an average temperature ranging between min 73°F (22.8°C) and max 93.9°F (34.4°C).

Temperature

The advent of May observes an average high-temperature of a still tropical 93.9°F (34.4°C), nearly identical to April's 90.1°F (32.3°C). During the month of May, Rio Grande City's nighttime temperature lowers to an average of 73°F (22.8°C).

Heat index

During May, the heat index is computed to be a blistering 111.2°F (44°C). Mindful: Heat cramps and heat exhaustion are to be expected. Extended physical effort might result in heatstroke.
When referencing the heat index, its values are suitable for shady environments and light breezes. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
In the face of high temperatures, the human body's reflex is to perspire, leveraging sweat evaporation for cooling. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

In Rio Grande City, the average relative humidity in May is 62%.

Rainfall

In Rio Grande City, Texas, in May, it is raining for 9.3 days, with typically 1.69" (43mm) of accumulated precipitation. In Rio Grande City, Texas, during the entire year, the rain falls for 98.5 days and collects up to 13.11" (333mm) of precipitation.

Snowfall

March through December are months without snowfall in Rio Grande City.

Daylight

In Rio Grande City, the average length of the day in May is 13h and 27min.
On the first day of May, sunrise is at 6:56 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 6:42 am and sunset at 8:23 pm CDT.

Sunshine

In May, the average sunshine is 10h.

UV index

The average daily maximum UV index in May in Rio Grande City is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: In May, a daily UV index of 7 turns into the following recommendations:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
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Frequently asked questions

How hot does it get in Rio Grande City in May?

An average high-temperature, in May, in Rio Grande City, is 93.9°F (34.4°C) and the average low-temperature is 73°F (22.8°C). 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 computed to be 111.2°F (44°C).

What is the average humidity in May in Rio Grande City?

In Rio Grande City, Texas, the average relative humidity in May is 62%.

How many days does it rain in May in Rio Grande City?

In Rio Grande City, Texas, in May, it is raining for 9.3 days, with typically 1.69" (43mm) of accumulated precipitation.

When it does not snow in Rio Grande City?

In Rio Grande City, snow does not fall in March through December.

How many hours of daylight does Rio Grande City have in May?

In May, the average day length in Rio Grande City, Texas, is 13h and 27min.

When are sunrise and sunset in May in Rio Grande City?

In May, on the first day of the month, sunrise is at 6:56 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 6:42 am and sunset at 8:23 pm CDT.

How many hours of sunshine does Rio Grande City have in May?

In Rio Grande City, the average sunshine duration in May is 10h.

What is the UV index reading in May in Rio Grande City?

In May, the average daily maximum UV index in Rio Grande City, Texas, is 7. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe 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
Rio Grande City, TX

Average temperature in May - Rio Grande City, TX
  • Average high temperature in May: 93.9°F

The warmest month (with the highest average high temperature) is August (100°F).
The month with the lowest average high temperature is January (69.8°F).

  • Average low temperature in May: 73°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 (52.7°F).

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Average pressure in May
Rio Grande City, TX

Average pressure in May - Rio Grande City, TX
  • Average pressure in May: 29.87"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are May and June (29.87"Hg).

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Average wind speed in May
Rio Grande City, TX

Average wind speed in May - Rio Grande City, TX
  • Average wind speed in May: 13.5mph

The windiest month (with the highest average wind speed) is July (13.9mph).
The calmest month (with the lowest average wind speed) is December (9.2mph).

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Average humidity in May
Rio Grande City, TX

Average humidity in May - Rio Grande City, TX
  • Average humidity in May: 62%

The month with the highest relative humidity is December (65%).
The month with the lowest relative humidity is August (53%).

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Average rainfall in May
Rio Grande City, TX

Average rainfall in May - Rio Grande City, TX
  • Average rainfall in May: 1.69"

The wettest month (with the highest rainfall) is September (2.56").
The driest month (with the least rainfall) is February (0.47").

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Average rainfall days in May
Rio Grande City, TX

Average rainfall days in May - Rio Grande City, TX
  • Average rainfall days in May: 9.3 days

The month with the highest number of rainy days is September (15.3 days).
The month with the least rainy days is February (5.8 days).

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Average snowfall days in May
Rio Grande City, TX

Average snowfall days in May - Rio Grande City, TX
  • Average snowfall days in May: 0 days

The months with the highest number of snowfall days are January and February (0.1 days).
The months with the least snowfall days are 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
Rio Grande City, TX

Average daylight in May / Average sunshine in May - Rio Grande City, 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 0min

The months with the most sunshine are June and July (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).

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Average sunshine days in May
Rio Grande City, TX

Average sunshine days in May - Rio Grande City, TX
  • Average sunshine days in May: 20.5 days

The months with the most sunshine days are July and August (22.6 days).
The month with the least sunshine days is September (12.9 days).

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Average UV index in May
Rio Grande City, TX

Average UV index in May - Rio Grande City, TX
  • Average UV index in May: 7

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

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Average cloud cover in May
Rio Grande City, TX

Average cloud cover in May - Rio Grande City, TX
  • Average cloud cover in May: 30

The month with the most cloud cover is December (Cloud cover 36).
The month with the least cloud cover is August (Cloud cover 16).

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Average visibility in May
Rio Grande City, TX

Average visibility in May - Rio Grande City, 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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Rio Grande City, Texas, USA

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