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Weather in Philadelphia
Philadelphia has a humid subtropical climate with four distinct seasons. Bear in mind that precipitation is evenly distributed throughout the year, so it is best to pack an umbrella with you.
Spring (March to May) usually comes later than many locals would like. In March, the average high is 13°C (55°F) while the average low is 1°C (34°F). But the weather warms up considerably by April, with wildflowers start to bloom and people come out in droves to enjoy the Subaru Cherry Blossom Festival. The second weekend in May sees Philadelphia hosting the Jefferson Dad Vail Regatta, the largest collegiate regatta in North America.
Summer (June to August) is lovely and a popular period for families with children. Being the birthplace of America where the Declaration of Independence and the Constitution were signed, Philly celebrates the Fourth of July with fireworks, free concerts and many patriotic events. Temperatures in July may reach 31°C (88°F) so keep hydrated with plenty of water.
Autumn (September to November) is pleasant and beautiful, with the fall colours out in all their glory. In October, the average high is 21°C (70°F) while the average low is 9°C (48°F).
Winter (December to February) is moderately cold. In January, the average high is 7°C (45°F) while the average low is -3°C (27°F). Snowfall is erratic with snowstorms occurring every once in a while. During the dark winter months, ice-skating at the Rothman Ice Rink at Dilworth Park or the Blue Cross River Rink Winterfest offers an unforgettable experience.
Night
| Weather (night) | Temp (min night) | Rain (mm) | Wind (mph) | Humidity Pressure Visibility | ||
|---|---|---|---|---|---|---|
| Mon |
Partly Cloudy Night
|
Partly cloudy skies |
1 8 °C |
3.7mm |
6
e |
78%
1,020mb Good |
| Tue |
Partly Cloudy Night
|
Partly cloudy skies |
2 0 °C |
3.8mm |
4
ese |
89%
1,015mb Good |
| Wed |
Clear
|
Clear skies |
2 2 °C |
3.8mm |
9
wnw |
77%
1,012mb Good |
| Thu |
Clear
|
Clear skies |
1 9 °C |
0.1mm |
5
wsw |
68%
1,016mb Good |
| Fri |
Partly Cloudy Night
|
Partly cloudy skies |
1 9 °C |
1.8mm |
11
nnw |
55%
1,020mb Good |
| Sat |
Clear
|
Clear skies |
1 7 °C |
1.9mm |
3
s |
66%
1,025mb Good |
| Sun |
Overcast
|
Overcast skies |
1 8 °C |
2.7mm |
4
s |
68%
1,023mb Good |
| Mon |
Occ Light Rain
|
Patchy rain possible |
2 3 °C |
0mm |
7
ssw |
69%
1,016mb Moderate |
| Tue |
Part Cloud Rain Thunder Day
|
Thundery outbreaks possible |
2 5 °C |
0mm |
8
sw |
62%
1,010mb Moderate |
Last updated at 04:06, Tuesday 27 August
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Last updated: We update the weather data for Philadelphia from our weather partner every four hours. The time the last update was received is detailed here.
Actual Forecast Location: We have 830+ weather locations on the worldtravelguide.net website. Where no exact location is available we have used the nearest appropriate forecast point.
Symbols indicate the predominant weather for the day in question, calculated based on a weighting of different types of weather. So if a day is forecast to be sunny with the possibility of a brief shower, then we will see a sunny or partly cloudy symbol rather than a rain cloud. For the purpose of this forecast, 'day' is the entire 24 our period 00:00 to 23:59
The maximum temperature is the highest temperature forecast between dawn and dusk, and the minimum temperature is the lowest temperature expected from dusk on the day in question to dawn the next day. The temperature is in °C, or Celsius.
Wind speed and direction are the conditions expected at midday. Wind direction is based on a 16 point compass. W, SW, SSW, etc. The wind direction states where the wind originates. Wind speed is listed in MPH or miles per hour.
Humidity levels indicates how much water vapour the air contains compared to the maximum it could contain at that temperature. As a general guide:
- 0 to 30 is very low
- 31 to 50 is low
- 51 to 70 is moderate to low
- 71 to 80 is moderate
- 81 to 90 is moderate to high
- 91 to 100 is high
Pressure is measured in millibars (mb)
Visibility based on whether the human eye can see the following distances:
- Very poor - less than 1km
- Poor - between 1km and 4km
- Moderate - between 4km and 10km
- Good - between 10km and 20km
- Very good - between 20km and 40km
- Excellent - more than 40km
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