July weather forecast
Galveston, TX

As the peak of summer, July experiences the highest temperatures all year. The sultry days, hinted by the sea temperature climaxing at 86.1°F (30.1°C), are balanced out by a breeze blowing at a cozy 9.8mph (15.8km/h). July is not only the warmest but also sees some of the highest rainfall levels peaking at an average of 3.19" (81mm). Despite the occasional weather extremes, July remains a favored time for sun-soaked activities, thanks to the persistent sunshine and relatively low cloud cover.

Temperature

The average high-temperature in July in Galveston, Texas, at a tropical 86.4°F (30.2°C), reveals a modest deviation from June's 84.7°F (29.3°C). Galveston notes a consistent average low-temperature of 81.7°F (27.6°C) during July nights.

Heat index

In July, the average heat index is computed to be a sweltering 98.6°F (37°C). Take more safety measures, heat exhaustion and heat cramps are potential outcomes. Persistent activity might lead to heatstroke.
Heat index readings emphasize conditions of light breezes and shaded spots. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. The body is at risk of dehydration and related complications when it fails to shed excessive heat.

Humidity

In July, the average relative humidity is 76%.

Rainfall

In Galveston, Texas, in July, during 18.3 rainfall days, 3.19" (81mm) of precipitation is typically accumulated. In Galveston, Texas, during the entire year, the rain falls for 161.9 days and collects up to 24.33" (618mm) of precipitation.

Snowfall

In Galveston, snow does not fall in March through December.

Ocean temperature

In July, the average ocean temperature in Galveston is 86°F (30°C).
Note: Many argue that waters with temperatures surpassing 86°F (30°C) fail to offer the cooling sensation swimmers look for.

Daylight

In July, the average length of the day in Galveston is 13h and 49min.
On the first day of the month, sunrise is at 6:23 am and sunset at 8:22 pm. On the last day of July, sunrise is at 6:39 am and sunset at 8:11 pm CDT.

Sunshine

In July, the average sunshine is 10.8h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: In July, the maximum UV index of 7 suggests this advice:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Note! Reflective surfaces like sand and water heighten the UV radiation levels.