April weather forecast
Philadelphia, PA

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 April

April is an enjoyable spring month in Philadelphia, Pennsylvania, with an average temperature fluctuating between 61.7°F (16.5°C) and 45.1°F (7.3°C).

Temperature

In April, the average high-temperature increases from a frosty 49.8°F (9.9°C) in March to a comfortable 61.7°F (16.5°C). In April, in Philadelphia, the average low-temperature is 45.1°F (7.3°C).

Humidity

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

Rainfall

In Philadelphia, during April, the rain falls for 12.4 days and regularly aggregates up to 1.18" (30mm) of precipitation. In Philadelphia, during the entire year, the rain falls for 127.8 days and collects up to 13.82" (351mm) of precipitation.

Snowfall

Months with snowfall in Philadelphia are January through May, November and December. In Philadelphia, Pennsylvania, during April, snow falls for 0.1 days and regularly aggregates up to 0.08" (2mm) of snow. In Philadelphia, Pennsylvania, during the entire year, snow falls for 11.4 days and aggregates up to 2.87" (73mm) of snow.

Ocean temperature

In Philadelphia, the average seawater temperature in April is 46.8°F (8.2°C).
Note: At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

Daylight

In Philadelphia, the average length of the day in April is 13h and 17min.
On the first day of the month, sunrise is at 6:44 am and sunset at 7:24 pm. On the last day of April, sunrise is at 6:01 am and sunset at 7:53 pm EDT.

Sunshine

In April, the average sunshine is 8.4h.

UV index

The average daily maximum UV index in April in Philadelphia is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: The daily maximum UV index of 4 in April interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in April in Philadelphia?

The average high-temperature, in April, in Philadelphia, is 61.7°F (16.5°C), while the average low-temperature is 45.1°F (7.3°C).

What is the least humid month in Philadelphia?

April and August, with an average relative humidity of 71%, are the least humid months in Philadelphia.

What is the average humidity in April in Philadelphia?

In April, the average relative humidity in Philadelphia, Pennsylvania, is 71%.

How many days does it rain in April in Philadelphia?

In Philadelphia, Pennsylvania, during April, the rain falls for 12.4 days and regularly aggregates up to 1.18" (30mm) of precipitation.

How much does it snow in Philadelphia in April?

In Philadelphia, in April, during 0.1 snowfall days, 0.08" (2mm) of snow is typically accumulated.

How cold is the water in April in Philadelphia?

In Philadelphia, in April, the average water temperature is 46.8°F (8.2°C). Swimming in 46.8°F (8.2°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

How many hours of daylight does Philadelphia have in April?

The average day length in April in Philadelphia, Pennsylvania, is 13h and 17min.

When are sunrise and sunset in April in Philadelphia?

On the first day of April, sunrise is at 6:44 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 6:01 am and sunset at 7:53 pm EDT.

How many hours of sunshine does Philadelphia have in April?

In April, the average sunshine duration is 8.4h.

How high is the UV index in April in Philadelphia?

The average daily maximum UV index in April in Philadelphia is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in April
Philadelphia, PA

Average temperature in April - Philadelphia, PA
  • Average high temperature in April: 61.7°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 April: 45.1°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).

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Average pressure in April
Philadelphia, PA

Average pressure in April - Philadelphia, PA
  • Average pressure in April: 29.99"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).

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Average wind speed in April
Philadelphia, PA

Average wind speed in April - Philadelphia, PA
  • Average wind speed in April: 8.5mph

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).

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Average humidity in April
Philadelphia, PA

Average humidity in April - Philadelphia, PA
  • Average humidity in April: 71%

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

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Average rainfall in April
Philadelphia, PA

Average rainfall in April - Philadelphia, PA
  • Average rainfall in April: 1.18"

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

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Average rainfall days in April
Philadelphia, PA

Average rainfall days in April - Philadelphia, PA
  • Average rainfall days in April: 12.4 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).

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Average snowfall in April
Philadelphia, PA

Average snowfall in April - Philadelphia, PA
  • Average snowfall in April: 0.08"

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

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Average snowfall days in April
Philadelphia, PA

Average snowfall days in April - Philadelphia, PA
  • Average snowfall days in April: 0.1 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).

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Average sea temperature in April
Philadelphia, PA

Average sea temperature in April - Philadelphia, PA
  • Average sea temperature in April: 46.7°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).

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

Average daylight in April / Average sunshine in April - Philadelphia, PA
  • Average daylight in April: 13h and 17min

The month with the longest days is June (Average daylight: 14h and 58min).
The month with the shortest days is December (Average daylight: 9h and 23min).

  • Average sunshine in April: 8h and 24min

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).

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Average sunshine days in April
Philadelphia, PA

Average sunshine days in April - Philadelphia, PA
  • Average sunshine days in April: 15.3 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).

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Average UV index in April
Philadelphia, PA

Average UV index in April - Philadelphia, PA
  • Average UV index in April: 4

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).

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Average cloud cover in April
Philadelphia, PA

Average cloud cover in April - Philadelphia, PA
  • Average cloud cover in April: 43

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).

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Average visibility in April
Philadelphia, PA

Average visibility in April - Philadelphia, PA
  • Average visibility in April: 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).

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