July weather forecast
Frederick, MD

July is the peak of Summer in Frederick, with temperatures rising to an average high of 85.6°F (29.8°C), the highest of the year. This month is hot, yet balanced with seemingly longer daylight hours, facilitating summer activities till late. Due to the soaring temperatures, rainfall tends to drop, ensuring clear, sunny days. The season's characteristically low wind speeds and warm temperatures make for an ideal beach climate. Amidst the summer warmth, the high-pressure system dominates, making the weather comfortably dry and sunny.

Temperature

In Frederick, July is the warmest month, with temperatures averaging a high of 85.6°F (29.8°C) and a low of 64.9°F (18.3°C).

Heat index

The heat index value during July is appraised at a sweltering 96.8°F (36°C). Incorporate additional preventive steps, heat exhaustion and heat cramps are possible. Long-lasting activity may cause heatstroke.
Be aware that heat index ratings are designed for shaded locations and minor breezes. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', arises from combining readings of air temperature and relative moisture content. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. 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 are quite important for babies and toddlers. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

With an average relative humidity of 74%, July is the least humid month.

Rainfall

In Frederick, during July, the rain falls for 16.7 days and regularly aggregates up to 3.31" (84mm) of precipitation. Throughout the year, there are 159.7 rainfall days, and 30.04" (763mm) of precipitation is accumulated.

Snowfall

June through October are months without snowfall.

Daylight

In July, the average length of the day is 14h and 38min.
On the first day of July, sunrise is at 5:46 am and sunset at 8:40 pm. On the last day of the month, sunrise is at 6:09 am and sunset at 8:22 pm EDT.

Sunshine

With an average of 10.6h 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 in Frederick. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In July, the maximum UV index of 6 transforms into these recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.