July weather forecast
Greenbelt, MD

The sun-coated days of July extend the gold-studded summer afternoons of June in Greenbelt. The heat of July is the year's peak, with temperatures soaring to 87.4°F (30.8°C). The summer bloom and the brilliant blue sky are both inviting and pleasing to the eye. Despite the reduced sunlight hours from the previous month, July manages to provide the most sunshine in the day, providing ample opportunity for outdoor activities.

Temperature

July registers as the month with the highest average temperatures, reaching 87.4°F (30.8°C) at its peak and 70°F (21.1°C) at the lowest.

Heat index

For July, the heat index is computed to be a fiery hot 98.6°F (37°C). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
Keep in mind the heat index values are meant for areas in shade and with light wind. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. Excessive relative humidity disturbs the body's typical cooling process by reducing evaporation, leading to a decrease in body cooling rate and an increase in the sensation of warmth. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

The months with the lowest humidity are April and July, with an average relative humidity of 71%.

Rainfall

In Greenbelt, in July, it is raining for 16.8 days, with typically 3.11" (79mm) of accumulated precipitation. In Greenbelt, Maryland, during the entire year, the rain falls for 157.9 days and collects up to 31.14" (791mm) of precipitation.

Snowfall

In Greenbelt, snow does not fall in May through November.

Daylight

The average length of the day in July is 14h and 35min.
On the first day of July, sunrise is at 5:45 am and sunset at 8:37 pm. On the last day of the month, sunrise is at 6:08 am and sunset at 8:19 pm EDT.

Sunshine

The month with the most sunshine in Greenbelt is July, with an average of 10.9h of sunshine.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: In July, a daily maximum UV index of 6 leads to the following instructions:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays.