July weather forecast
Mount Rainier, MD

July embraces the height of summer with the highest temperatures experienced in Mount Rainier. The mercury scales up to a soaring 87.4°F (30.8°C) during this month, marking the warmest weather of the year. With the sun presenting longer and a drop in cloud coverage, July outshines the previous months. The rain observed in July is less compared to the wetter month of August. July's weather represents the epitome of summer in Mount Rainier, a stepping stone to an even drier and warmer August.

Temperature

Mount Rainier's warmest month, July, registers temperatures that range from a high of 87.4°F (30.8°C) to a low of 70°F (21.1°C).

Heat index

July's average heat index is evaluated at a fiery hot 98.6°F (37°C). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
Bear in mind that the heat index values are determined for shaded areas and light breezes. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', quantifies the warmth felt when relative humidity is considered. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

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

Rainfall

In Mount Rainier, Maryland, during July, the rain falls for 16.8 days and regularly aggregates up to 3.11" (79mm) of precipitation. Throughout the year, in Mount Rainier, there are 157.9 rainfall days, and 31.14" (791mm) of precipitation is accumulated.

Snowfall

In Mount Rainier, snow does not fall in May through November.

Daylight

In July, the average length of the day in Mount Rainier, Maryland, is 14h and 35min.
On the first day of July in Mount Rainier, sunrise is at 5:46 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

With an average of 10.9h of sunshine, July has the most sunshine of the year.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: In July, the average maximum UV index of 6 translates into the following recommendations:
Fend off overexposure. Sun protection is vital. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.