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Philadelphia weather

Pennsylvania · 1,573,916 inhabitants · Thursday, October 29 · updated 15:18

Air: Fair

20°

Clear sky

Feels like 22°C

Wind

10 km/h

Gusts

14 km/h

Humidity

57 %

Pressure

1023 hPa

Clouds

0 %

Storm

Rise 07:26 Set 18:02 Day 10 h 35 min UV 6 · Moderate

Morning, afternoon, evening

Trend

Afternoon

Clear sky

20°

Feels like 21°

Wind ↑ SW 10 km/h

Gusts 16 km/h

Humidity 50 %

Evening

Clear sky

15°

Feels like 15°

Wind ↑ SSW 12 km/h

Gusts 27 km/h

Humidity 75 %

17:00

20°

SW 10

Philadelphia forecast in charts · next 7 days

The week ahead: highs and lows

▲ This week runs +3.4° warmer than usual

Highs Lows Usual for the season (1991–2020 average)

Hourly detail

Temperature (°C) Rain (mm) Wind (km/h)

Philadelphia climate: what a normal year looks like

The hottest stretch is July, when afternoons average 30 °C; the coldest is January, when nights average −2 °C. Between those two months the average temperature changes by 24 °C.

Nights typically freeze in January and February, the coldest averaging −2 °C in January.

From 15 h 00 min of daylight in late June to 9 h 20 min in late December.

There is no real dry season: monthly rainfall stays between 75 mm and 106 mm on average.

The coming week looks normal for October: forecast highs average 19 °C, against a usual 19 °C.

30-year averages (1991–2020)
Month	Typical high	Typical low	Rainfall
Jan	5 °C	−2 °C	84 mm
Feb	7 °C	−1 °C	78 mm
Mar	11 °C	2 °C	106 mm
Apr	17 °C	7 °C	93 mm
May	23 °C	13 °C	91 mm
Jun	27 °C	18 °C	100 mm
Jul	30 °C	21 °C	100 mm
Aug	29 °C	20 °C	100 mm
Sep	25 °C	17 °C	104 mm
Oct	19 °C	11 °C	93 mm
Nov	13 °C	5 °C	75 mm
Dec	8 °C	1 °C	102 mm
Whole year	18 °C	9 °C	1,120 mm

Source: our own processing of the ERA5 reanalysis (Copernicus/ECMWF) for 39.95° N, 75.16° W, 1991–2020. ERA5 averages over a 0.25° grid (about 25 km): hills, a coastline or the heat of the city itself can shift local values by a degree or two.

Air you breathe in Philadelphia: pollution and pollen

2/6

Fair

European Air Quality Index (EAQI), from Copernicus CAMS

PM2.517µg/m³

PM1019µg/m³

Copernicus CAMS model, updated several times a day.

Rain radar around Philadelphia

Rain observed over the last two hours by official weather radars around Philadelphia, followed by the radar forecast for the next hour where the weather service provides one.

Full-screen rain radar and next-hour rain on RainAtlas

Rain radar Last two hours, then forecast where available · drag the timeline

Moon over Philadelphia

Waning gibbous

87 % illuminated · 18.3 days

Rise 16:21 Set 07:40

Fri 30/10 79%

Sat 31/10 69%

Sun 1/11 59%

Mon 2/11 49% Last quarter

Tue 3/11 38%

Wed 4/11 28%

Thu 5/11 19%

Fri 6/11 12%

Sat 7/11 6%

Sun 8/11 2%

Mon 9/11 0%

Tue 10/11 1% New moon

Moonrise and moonset in local time (America/New_York); phase and lit fraction from a synodic calculation.

Sea and tides near Philadelphia

Tide station used: Delaware River at Penns Landing Philadelphia Pa · 2 km away

WedWed 28/10

Low tide 23:36 0.1 m

TodayThu 29/10

High tide 04:29 1.8 m

Low tide 11:40 0.1 m

High tide 16:50 2.1 m

TomorrowFri 30/10

Low tide 00:28 0.1 m

High tide 05:24 1.7 m

Low tide 12:32 0.1 m

High tide 17:46 2.1 m

SatSat 31/10

Low tide 01:22 0.1 m

High tide 06:24 1.7 m

Low tide 13:27 0.1 m

High tide 18:47 2.0 m

Indicative heights above chart datum. Coefficient: 20 for the weakest tides, 120 for the strongest.

Look up a past day in Philadelphia

Curious about the weather in Philadelphia on a given day? Choose a date: we read it from the ERA5 reanalysis (ECMWF / Copernicus C3S), which runs until about a week ago.

Philadelphia weather at a glance

This page gathers everything about the weather in Philadelphia, Pennsylvania: conditions now, the forecast for each part of the day and the trend for the coming week. At the moment the sky is “clear sky”, it is 20 °C (feels like 22 °C) and the wind blows at 10 km/h.

Expected range today: 8 °C to 20 °C and a dry sky. The forecast comes from the AtmoAtlas engine, which combines ECMWF-AIFS, NOAA GFS and DWD ICON, adjusts cloud cover with METAR reports and uses convective energy (CAPE) to flag storms, plus the tide times for Delaware River at Penns Landing Philadelphia Pa.

Other big cities nearby

Staten Island 110 km 20°

Brooklyn 129 km 20°

New York City 130 km 20°

Washington 199 km 21°

Philadelphia weather data for developers

Use the Philadelphia forecast in your own website or app: one JSON call returns weather, air quality, tides and sun and moon times. The free key needs no card.

Create a free key

Where does this forecast come from? Our engine, checked every day against 1125 weather stations