United States · 1991–2020

Best time to visit
Philadelphia

For Philadelphia, May has the most comfortable weather in our climate comparison. Typical daytime highs are 23.9°C, nights average 13.8°C, and rainfall totals about 111 mm. Figures use measured 1991–2020 normals from the nearest eligible NOAA station.

Best all-round monthMay

Typical daytime high23.9°C

Typical night-time low13.8°C

May rainfall111 mm

Overall comfort

May

Other strong months: September and October

80/100 weather score

Outdoor sightseeing

October

Other strong months: April and May

80/100 weather score

Make the answer personal

Choose the weather
that suits you.

Set the daytime temperature and rainfall you are comfortable with. We will show only the months that meet every choice, using the measured 1991–2020 averages below.

Daytime high: at least 18°CDaytime high: at most 28°CMonthly rain: no more than 120 mmWet days: no more than 11

4 months fit your choices for Philadelphia

April18.7°C day · 107 mm rain · 9.3 wet days

May23.9°C day · 111 mm rain · 10.9 wet days

September26.5°C day · 116 mm rain · 7.5 wet days

October19.7°C day · 105 mm rain · 7.7 wet days

The lowest comfort score is 5 out of 100. January and February share that score. In January, that is mainly because days reach only 5°C, 19° below the 24°C the score treats as ideal.

Quick answers

Planning a trip to Philadelphia?

These answers come from the same measured monthly climate record shown on this page.

When is the best time to visit Philadelphia?

May is the strongest all-round choice in our temperature-and-rainfall comparison, with a typical daytime high of 23.9°C and 111 mm of rain.

What is the hottest month in Philadelphia?

July is hottest in this record, with a typical daytime high of 31.7°C and a night-time low of 22.2°C.

Which month has the least rain?

February and November have the lowest monthly rainfall total at 83 mm.

Is this a weather forecast?

No. These are long-term measured averages from 1991–2020. Check a current forecast before you travel.

Month by month

See how the weather
changes through the year.

The bars combine daytime temperature, night-time temperature and rainfall. The figures are measured historical averages, not a forecast for a particular trip.

55° / -2.2°

57° / -1.1°

2111.8° / 2.7°

5518.7° / 8.4°

8023.9° / 13.8°

5729.1° / 19.2°

4531.7° / 22.2°

5030.5° / 21.2°

7226.5° / 17.4°

6419.7° / 10.9°

3713.4° / 5.3°

67.9° / 1°

Monthly climate evidence for Philadelphia — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	5°C	-2.2°C	95 mm	8.8	9 h 37	5	Strong coverage
February	7°C	-1.1°C	83 mm	7.5	10 h 37	5	Strong coverage
March	11.8°C	2.7°C	112 mm	8.7	11 h 49	21	Strong coverage
April	18.7°C	8.4°C	107 mm	9.3	13 h 12	55	Strong coverage
May	23.9°C	13.8°C	111 mm	10.9	14 h 22	80	Strong coverage
June	29.1°C	19.2°C	126 mm	9.3	14 h 59	57	Strong coverage
July	31.7°C	22.2°C	115 mm	8.5	14 h 44	45	Strong coverage
August	30.5°C	21.2°C	126 mm	7.8	13 h 45	50	Strong coverage
September	26.5°C	17.4°C	116 mm	7.5	12 h 24	72	Strong coverage
October	19.7°C	10.9°C	105 mm	7.7	11 h 04	64	Strong coverage
November	13.4°C	5.3°C	83 mm	7.2	9 h 55	37	Strong coverage
December	7.9°C	1°C	112 mm	8.7	9 h 21	6	Strong coverage

Records at PHILA FRANKLIN INST, 1993–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	22.8°C29 Jan 2002	-20.6°C19 Jan 1994	63 mm23 Jan 1998	156 mm1994 · driest 8 mm in 2025	33
February	25.6°C22 Feb 2018	-17.2°C20 Feb 2015	58 mm17 Feb 2003	205 mm2003 · driest 0 mm in 2023	32
March	32.2°C30 Mar 1998	-12.2°C1 Mar 2014	68 mm23 Mar 2024	196 mm1994 · driest 5 mm in 2026	32
April	36.7°C17 Apr 2002	-3.9°C6 Apr 1995	81 mm16 Apr 2018	255 mm2007 · driest 3 mm in 2024	31
May	36.7°C29 May 2006	4.4°C13 May 1996	72 mm24 May 1999	192 mm2017 · driest 1 mm in 2024	32
June	39.4°C25 Jun 2025	10.0°C1 Jun 2021	107 mm26 Jun 2006	447 mm2006 · driest 9 mm in 2025	32
July	40.0°C27 Jul 2005	13.9°C2 Jul 2001	130 mm12 Jul 2004	253 mm2004 · driest 3 mm in 2024	32
August	39.4°C9 Aug 2001	11.7°C6 Aug 1994	146 mm27 Aug 2011	424 mm2011 · driest 0 mm in 2023	33
September	37.2°C8 Sep 2023	6.7°C20 Sep 1993	191 mm28 Sep 2004	342 mm1999 · driest 1 mm in 2023	33
October	35.0°C3 Oct 2019	-0.6°C30 Oct 2008	130 mm8 Oct 2005	264 mm2005 · driest 0 mm in 2024	32
November	28.3°C1 Nov 2024	-6.7°C24 Nov 2018	72 mm28 Nov 1993	247 mm2018 · driest 7 mm in 2021	33
December	22.8°C7 Dec 1998	-14.4°C24 Dec 2022	84 mm14 Dec 1996	246 mm1996 · driest 0 mm in 2024	33

Typical days per month at PHILA FRANKLIN INST, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	20	3	3
February	0	0	16	3	2
March	<1	0	9	4	1
April	5	1	<1	3	0
May	14	5	0	4	0
June	26	14	0	4	0
July	30	23	0	4	0
August	30	20	0	4	0
September	20	7	0	3	0
October	5	<1	<1	3	0
November	<1	0	3	3	0
December	0	0	13	4	2

How often different weather occurs at PHILA FRANKLIN INST, based on its daily record
Month	Dry days reaching 20°C	Wet days	Days with heavy rain	Weeks with 3+ wet days	Typical high by year
January	<1%	27%	10%	33%	2.3–8.6°C
February	2%	25%	10%	27%	4.0–9.9°C
March	11%	27%	12%	28%	9.1–15.3°C
April	33%	30%	11%	40%	17.5–20.8°C
May	56%	34%	13%	43%	22.0–25.8°C
June	70%	29%	13%	29%	27.7–30.7°C
July	73%	27%	13%	28%	29.5–33.6°C
August	76%	24%	12%	22%	28.8–32.4°C
September	73%	24%	11%	24%	24.8–28.4°C
October	42%	23%	10%	21%	18.2–22.2°C
November	10%	23%	9%	22%	10.8–16.3°C
December	1%	27%	12%	29%	5.5–10.8°C

A dry day reaching 20°C records under 1 mm of rain. A wet day records at least 1 mm, while a heavy-rain day records at least 10 mm. The weekly figure is the share of seven-day periods containing three or more wet days. The final column shows the middle 80% of average daytime highs recorded for that month in individual years; a wider range means conditions have varied more from one year to another.

1994Each stripe is one year’s mean temperature against the 28-year average. Warmest: 1998. Coolest: 1996.2025

The evidence behind this page

Where these figures
come from.

Place identity: GeoNames 4560349
NOAA station: USC00366886 · PHILA FRANKLIN INST
Station distance: 1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 25 usable years
Daylight: Calculated from latitude 39.95°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Important limit: Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.

Next step

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Then plan the details.

The weather comparison for Philadelphia is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.

How travel partnerships will work

Keep exploring

Same climate evidence,
different places.

These places read the same station, so their climate numbers are identical. Their setting, population and distance from PHILA FRANKLIN INST are not.

New JerseyCamdenMay is the strongest comfort month on this shared record · population 76,119Explore the year PennsylvaniaCenter CityMay is the strongest comfort month on this shared record · population 57,239Explore the year PennsylvaniaHavertownMay is the strongest comfort month on this shared record · population 50,430Explore the year PennsylvaniaWhartonMay is the strongest comfort month on this shared record · population 49,732Explore the year PennsylvaniaWhitmanMay is the strongest comfort month on this shared record · population 49,732Explore the year PennsylvaniaOlneyMay is the strongest comfort month on this shared record · population 39,154Explore the year

Or put two places side by side: Philadelphia vs Camden

Best time to visitPhiladelphia

May