United States · 1991–2020

Best time to visit
Philadelphia.

May leads for comfortable weather in Philadelphia: typically 23.9°C by day, 13.8°C at night, with 111 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortMay

Typical high23.9°C

Typical low13.8°C

Rain in May111 mm

Comfort

May

May · September · October

80climate match

Beach

August

August · June · July

74climate match

Outdoors

October

October · April · May

80climate match

The weakest month is January, scoring 5 against May’s 80 — days reach only 5°C, 19° below the 24°C the score treats as ideal.

Month by month

The whole year,
without the guesswork.

The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.

Jan

55° / -2.2°

Feb

57° / -1.1°

Mar

2111.8° / 2.7°

Apr

5518.7° / 8.4°

May

8023.9° / 13.8°

Jun

5729.1° / 19.2°

Jul

4531.7° / 22.2°

Aug

5030.5° / 21.2°

Sep

7226.5° / 17.4°

Oct

6419.7° / 10.9°

Nov

3713.4° / 5.3°

Dec

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, not how much — every day in PHILA FRANKLIN INST’s record sorted by what it was actually like, rather than averaged
Month	Warm & dry days	Wet days	Washouts	Week with 3+ wet days	Daytime mean has ranged
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 warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.

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

The evidence behind this page

Nearby, measured,
and named.

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.

These places read the same station, so their numbers are identical — distance from PHILA FRANKLIN INST is what differs

Camden→Center City→Havertown→Wharton→Whitman→Olney→

Or put two places side by side: Philadelphia vs Camden

Best time to visitPhiladelphia.

May

August

October

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Philadelphia.

The whole year,
without the guesswork.

Nearby, measured,
and named.