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

West Chester's July weather, marked by an average high temperature of 84.9°F (29.4°C) and an average low temperature of 67.1°F (19.5°C), is the warmest in the year.

Heat index

For July, the heat index is estimated at a torrid 95°F (35°C). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', represents the fusion of temperature and moisture in the air to suggest how warm it feels. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. When the air holds a significant amount of moisture, the efficiency of the evaporation process is decreased, preventing the body from cooling down efficiently, leading to the sensation of overheating. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.

Humidity

The average relative humidity in July is 75%.

Rainfall

In July, the rain falls for 15.3 days. Throughout July, 1.85" (47mm) of precipitation is accumulated. In West Chester, during the entire year, the rain falls for 128.5 days and collects up to 14.92" (379mm) of precipitation.

Snowfall

June through October are months without snowfall in West Chester.

Daylight

In July, the average length of the day in West Chester 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

July has the most sunshine of the year in West Chester, with an average of 10.6h of sunshine.

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 threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A daily maximum UV index of 6 in July translates into the following instructions:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. 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. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.