Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average snowfall in April
- Average snowfall days in April
- Average sea temperature in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
Philadelphia's weather shows a temperature rise with the arrival of April, moving from a frosty 49.8°F (9.9°C) in March to a comfortable 61.7°F (16.5°C). During April, Philadelphia's temperature falls to a steady low-temperature average of 45.1°F (7.3°C).Humidity
The months with the lowest humidity are April and August, with an average relative humidity of 71%.Rainfall
In Philadelphia, Pennsylvania, in April, during 12.4 rainfall days, 1.18" (30mm) of precipitation is typically accumulated. Throughout the year, there are 127.8 rainfall days, and 13.82" (351mm) of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall. In April, it is snowing for 0.1 days. Throughout April, 0.08" (2mm) of snow is accumulated. Throughout the year, there are 11.4 snowfall days, and 2.87" (73mm) of snow is accumulated.Ocean temperature
In April, the average ocean temperature is 46.8°F (8.2°C).Note: It is risky to swim in 46.8°F (8.2°C). Temperatures beneath 50°F (10°C) induce rapid cold shock and hyperventilation.
Daylight
In April, the average length of the day is 13h and 17min.On the first day of the month, sunrise is at 6:43 am and sunset at 7:25 pm. On the last day of April, sunrise is at 6:00 am and sunset at 7:54 pm EDT.
Sunshine
In April, the average sunshine is 8.4h.UV index
In April, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily high UV index of 4 during April translates into the following recommendations:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are April temperatures?
What are the least humid months?
What is the average humidity in April?
How much does it rain in April?
How many days does it snow in April?
How cold is the water in April?
How many hours of daylight does Philadelphia have in April?
When is the sunrise / sunset in April?
How long on average sun shines in April?
What is the UV index intensity in April?
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).
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).
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).
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%).
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").
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).
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").
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).
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).
Average daylight in April /
Average sunshine in April
Philadelphia, PA
- Average daylight in April: 13h and 2min
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 April: 8h and 2min
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 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).
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).
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).
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).
Philadelphia, Pennsylvania, USA
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