July weather forecast
Houston, TX

July is typically the hottest month in Houston with the mercury peaking at 93.4°F. It's a time when the city thrives under the summer sun and embraces the hustle and bustle of the season. The summer heat does not diminish the vibrancy of Houston, but rather adds to the festival-like atmosphere that envelops the city during this time. While spending extended time outdoors may be uncomfortable for some, others see it as an opportunity for water-based activities, thanks to the sultry conditions. In spite of the heat, the city's energy and the plethora of activities on offer ensure there's never a dull moment in Houston in July.

Temperature

July's onset records an average high-temperature of a still hot 93.4°F, a near match to June's 91°F. During July, the average low-temperature in Houston is a moderately hot 77.2°F.

Heat index

July's average heat index is calculated to be a life-threatening hot 120.2°F. Take caution: Heat exhaustion and heat cramps are probable. Heatstroke may be imminent with ongoing effort.
Observations indicate that the heat index values are for shady locations with light wind. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', unifies temperature and humidity readings to offer a comprehensive feel of warmth. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. 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 are particularly relevant to babies and toddlers. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.

Humidity

In July, the average relative humidity in Houston is 73%.

Rainfall

In Houston, in July, during 17.6 rainfall days, 3.15" of precipitation is typically accumulated. Throughout the year, there are 180.5 rainfall days, and 35.35" of precipitation is accumulated.

Snowfall

February through November are months without snowfall.

Daylight

In Houston, the average length of the day in July is 13h and 50min.
On the first day of the month, sunrise is at 6:24 am and sunset at 8:26 pm. On the last day of July, sunrise is at 6:40 am and sunset at 8:15 pm CDT.

Sunshine

In Houston, the average sunshine in July is 10.4h.

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 hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: In July, a daily maximum UV index of 7 leads to the following instructions:
Shun overexposure. Protection from sun ravages is indispensable. 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. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.