July weather forecast
Philadelphia, PA

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The George Washington statue in front of the Independence Hall in Philadelphia, Pennsylvania
The George Washington statue in front of the Independence Hall in Philadelphia, Pennsylvania

Weather in July

The heat of the mid-summer month of July is in full effect in Philadelphia, Pennsylvania, with temperatures reaching their highest for the year, soaring to an average of 86.4°F (30.2°C). Compared to June, July also sees a small increase in rainfall, measuring at 1.54" (39mm). The splendid, sunny weather makes for ideal conditions for outdoor picnics and jaunts to the beach. Though temperatures remain high throughout the day and night, a mild wind blows consistently, providing some relief. As summer progresses, the city continues to bask in warm, sunny days.

Temperature

July brings the highest temperatures, with an average high of 86.4°F (30.2°C) and an average low of 69.3°F (20.7°C).

Heat index

The heat index value for July is evaluated at a very hot 96.8°F (36°C). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.
Data suggests that the heat index is set for environments in shade and with a light wind. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', gauges the sensation of temperature factoring in the air's moisture content. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are especially vital to children. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

In Philadelphia, the average relative humidity in July is 72%.

Rainfall

In July, the rain falls for 14.8 days. Throughout July, 1.54" (39mm) of precipitation is accumulated. In Philadelphia, during the entire year, the rain falls for 127.8 days and collects up to 13.82" (351mm) of precipitation.

Snowfall

In Philadelphia, snow does not fall in June through October.

Ocean temperature

In Philadelphia, the average seawater temperature in July is 73.9°F (23.3°C).
Note: Individual cold sensitivities, influenced by sunshine, wind, and the ambient temperature, play a role in finding a swim in 73.9°F (23.3°C) water pleasant. (Olympic swimming events mandate water temperatures from 77°F (25°C) to 82.4°F (28°C).)

Daylight

The average length of the day in July is 14h and 41min.
On the first day of July, sunrise is at 5:36 am and sunset at 8:33 pm. On the last day of the month, sunrise is at 5:58 am and sunset at 8:15 pm EDT.

Sunshine

The month with the most sunshine is July, 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 of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: A daily maximum UV index of 6 in July translates into the following instructions:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. 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. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Warning! Reflective surfaces like sand and water amplify the Sun's UV radiation.

Frequently asked questions

What time of the year is the hottest?

July, with its high-temperature average of 86.4°F (30.2°C) and a low-temperature average of 69.3°F (20.7°C), is the warmest month.

How hot does it get in July?

July temperatures vary between a high-temperature of 86.4°F (30.2°C) and a low-temperature of 69.3°F (20.7°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in July is evaluated at 96.8°F (36°C).

What is the average humidity in July?

The average relative humidity in July in Philadelphia is 72%.

How much does it rain in July?

In Philadelphia, in July, it is raining for 14.8 days, with typically 1.54" (39mm) of accumulated precipitation.

When it does not snow?

June through October are months without snowfall.

What is the ocean temperature in July?

In Philadelphia, the average seawater temperature in July is 73.9°F (23.3°C). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 73.9°F (23.3°C) water may be enjoyable.

How many hours of daylight does Philadelphia have in July?

In July, the average day length is 14h and 41min.

When are sunrise and sunset in July?

On the first day of July, sunrise is at 5:36 am and sunset at 8:33 pm. On the last day of the month, sunrise is at 5:58 am and sunset at 8:15 pm EDT.

What month has the most sunshine?

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

How many hours of sunshine does Philadelphia have in July?

The average sunshine duration in July is 10.6h.

What is the month with the highest UV index?

May through August, with an average maximum UV index of 6, are months with the highest UV index.

How high is the UV index in July?

The average daily maximum UV index in July is 6. A UV Index estimate of 6 to 7 represents a high health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in July
Philadelphia, PA

Average temperature in July - Philadelphia, PA
  • Average high temperature in July: 86.4°F

The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (37.4°F).

  • Average low temperature in July: 69.3°F

The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is January (25.5°F).

Average pressure in July
Philadelphia, PA

Average pressure in July - Philadelphia, PA
  • Average pressure in July: 29.96"Hg

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in July
Philadelphia, PA

Average wind speed in July - Philadelphia, PA
  • Average wind speed in July: 5.7mph

The windiest months (with the highest average wind speed) are March and April (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).

Average humidity in July
Philadelphia, PA

Average humidity in July - Philadelphia, PA
  • Average humidity in July: 72%

The month with the highest relative humidity is October (77%).
The months with the lowest relative humidity are April and August (71%).

Average rainfall in July
Philadelphia, PA

Average rainfall in July - Philadelphia, PA
  • Average rainfall in July: 1.54"

The wettest month (with the highest rainfall) is August (1.65").
The driest months (with the least rainfall) are January and February (0.83").

Average rainfall days in July
Philadelphia, PA

Average rainfall days in July - Philadelphia, PA
  • Average rainfall days in July: 14.8 days

The month with the highest number of rainy days is July (14.8 days).
The month with the least rainy days is February (7.2 days).

Average snowfall in July
Philadelphia, PA

Average snowfall in July - Philadelphia, PA
  • Average snowfall in July: 0"

The month with the highest snowfall is February (0.98").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in July
Philadelphia, PA

Average snowfall days in July - Philadelphia, PA
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (3.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

Average sea temperature in July
Philadelphia, PA

Average sea temperature in July - Philadelphia, PA
  • Average sea temperature in July: 74°F

The best month for swimming (with the highest average sea temperature) is August (75.9°F).
The coldest month (with the lowest average sea temperature) is February (39.9°F).

Average daylight in July /
Average sunshine in July
Philadelphia, PA

Average daylight in July / Average sunshine in July - Philadelphia, PA
  • Average daylight in July: 14h and 4min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in July: 10h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days in July
Philadelphia, PA

Average sunshine days in July - Philadelphia, PA
  • Average sunshine days in July: 13.4 days

The month with the most sunshine days is December (20.9 days).
The month with the least sunshine days is May (13.3 days).

Average UV index in July
Philadelphia, PA

Average UV index in July - Philadelphia, PA
  • Average UV index in July: 6

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in July
Philadelphia, PA

Average cloud cover in July - Philadelphia, PA
  • Average cloud cover in July: 31

The months with the most cloud cover are February and March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in July
Philadelphia, PA

Average visibility in July - Philadelphia, PA
  • Average visibility in July: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Philadelphia, Pennsylvania, USA

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