May weather forecast
Brownsville, TX

With the advent of May in Brownsville, the city starts experiencing true summer vibes. The increase in daylight pairs well with the rising temperatures, resulting in longer, brighter days. The tropic warmth elevates the temperatures to peak at 86.5°F (30.3°C), signalling the onset of the hot season. The sunshine hours reach a high, making this a great time for outdoor activities. A dip in wind speed and the least cloud coverage of the year underscore the sunny glory of May.

Temperature

May observes an average high-temperature of a hot 86.5°F (30.3°C), marking an insignificant difference from April's 82.9°F (28.3°C). In the month of May, Brownsville witnesses a consistent average low-temperature of 74.8°F (23.8°C).

Heat index

The heat index for May is evaluated at a very hot 98.6°F (37°C). Adopt extra safety steps, risk of heat exhaustion and heat cramps is notable. Sustained activity might cause heatstroke.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', offers an insight into how hot it feels when we factor in moisture content. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

The months with the highest humidity are February, May and December, with an average relative humidity of 74%.

Rainfall

In Brownsville, during May, the rain falls for 8.8 days and regularly aggregates up to 0.87" (22mm) of precipitation. Throughout the year, there are 114 rainfall days, and 11.22" (285mm) of precipitation is accumulated.

Daylight

In May, the average length of the day is 13h and 25min.
On the first day of May, sunrise is at 6:52 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 8:17 pm CDT.

Sunshine

The average sunshine in May is 10.4h.

UV index

In May, the average daily maximum UV index is 7. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: A typical high UV index of 7 in May suggests the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.