July weather forecast
West Chester, PA

July is the peak of summer in West Chester, with temperatures reaching the highest point of the year - up to 84.9°F (29.4°C). The city sits under typically clear skies interspersed with fluffy white clouds; it is truly the epitome of a classic American summer here. The heat and humidity go hand in hand, yet they rarely become unbearable thanks to the brevity of the summer months. Evenings bring a welcome reprieve from the heat, lending a magical quality to the city under the summer stars. The roar of summer resonates in every nook and cranny of the city throughout July.

Temperature

July, recording an average high temperature of 84.9°F (29.4°C) and a low temperature of 67.1°F (19.5°C), is West Chester's warmest month.

Heat index

July's mean heat index is calculated to be a torrid 95°F (35°C). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.
It is essential to grasp that the heat index's numbers are for shade and light wind settings. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a numerical representation of warmth when taking temperature and moisture levels into account. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.
Evaporating sweat, thanks to perspiration, acts as a natural air conditioner for the human body. Increased relative humidity slows down evaporation, thereby decreasing the rate of heat removal from the body, culminating in a sensation of overheating. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

The average relative humidity in July in West Chester, Pennsylvania, is 75%.

Rainfall

In West Chester, in July, it is raining for 15.3 days, with typically 1.85" (47mm) of accumulated precipitation. Throughout the year, there are 128.5 rainfall days, and 14.92" (379mm) of precipitation is accumulated.

Snowfall

June through October are months without snowfall.

Daylight

In West Chester, the average length of the day in July is 14h and 41min.
On the first day of the month, sunrise is at 5:37 am and sunset at 8:35 pm. On the last day of July, sunrise is at 6:00 am and sunset at 8:16 pm EDT.

Sunshine

The month with the most sunshine is July, with an average of 10.6h 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 rays for average individuals.
Note: In July, a daily UV index of 6 turns into the following recommendations:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.