United States · 1991–2020

Best time to visit
Philadelphia.

October leads for comfortable weather in Philadelphia: typically 25.7°C by day, 11.2°C at night, with 97 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortOctober

Typical high25.7°C

Typical low11.2°C

Rain in October97 mm

Comfort

October

October · May · April

77climate match

Beach

September

September · May · June

74climate match

Outdoors

November

November · March · October

75climate match

The weakest month is January, scoring 23 against October’s 77 — days reach only 13.8°C, 10° below the 24°C the score treats as ideal, and nights drop to 1.6°C.

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

2313.8° / 1.6°

Feb

3316.3° / 3.2°

Mar

5620.6° / 6.8°

Apr

7024.6° / 10.8°

May

7228.5° / 15.8°

Jun

5032.1° / 19.8°

Jul

4133.3° / 21.5°

Aug

4133.2° / 21.2°

Sep

6330.9° / 17.8°

Oct

7725.7° / 11.2°

Nov

5619.7° / 5.6°

Dec

3215.1° / 2.7°

Monthly climate evidence for Philadelphia — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	13.8°C	1.6°C	146 mm	7.2	10 h 12	23	Strong coverage
February	16.3°C	3.2°C	152 mm	7.4	10 h 58	33	Strong coverage
March	20.6°C	6.8°C	135 mm	7.3	11 h 53	56	Strong coverage
April	24.6°C	10.8°C	158 mm	6.5	12 h 57	70	Strong coverage
May	28.5°C	15.8°C	96 mm	6.3	13 h 49	72	Strong coverage
June	32.1°C	19.8°C	107 mm	7.7	14 h 18	50	Strong coverage
July	33.3°C	21.5°C	125 mm	7.5	14 h 07	41	Strong coverage
August	33.2°C	21.2°C	130 mm	7	13 h 21	41	Strong coverage
September	30.9°C	17.8°C	85 mm	4.9	12 h 20	63	Strong coverage
October	25.7°C	11.2°C	97 mm	4.6	11 h 19	77	Strong coverage
November	19.7°C	5.6°C	111 mm	5.6	10 h 26	56	Strong coverage
December	15.1°C	2.7°C	127 mm	6.9	10 h 00	32	Strong coverage

What has changed

Philadelphia runs +1.0°C
on the 1961–1990 baseline.

Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.

Jan

+2.0

Feb

+2.0

Mar

+1.3

Apr

+0.3

May

+0.6

Jun

+0.7

Jul

+0.3

Aug

+0.4

Sep

+1.0

Oct

+1.2

Nov

-0.1

Dec

+2.1

October daytime highs, 2011–2022. Last recorded: 24.9°C.

Records at PHILA 1 WSW, 1949–2023
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	27.8°C14 Jan 1972	-19.4°C12 Jan 1962	159 mm6 Jan 1950	334 mm1979 · driest 23 mm in 1986	74
February	30.0°C27 Feb 1951	-17.8°C2 Feb 1951	164 mm6 Feb 2004	397 mm1990 · driest 9 mm in 2021	74
March	31.7°C24 Mar 1995	-10.0°C3 Mar 1980	139 mm5 Mar 1983	467 mm1976 · driest 20 mm in 2007	73
April	34.4°C19 Apr 2006	-2.8°C4 Apr 1987	179 mm25 Apr 2003	392 mm1991 · driest 11 mm in 1965	73
May	37.8°C31 May 1951	2.8°C2 May 1963	130 mm22 May 1967	353 mm1991 · driest 0 mm in 1993	74
June	39.4°C29 Jun 1954	5.6°C3 Jun 1956	107 mm26 Jun 1961	291 mm1989 · driest 12 mm in 1953	72
July	39.4°C26 Jul 1952	11.1°C15 Jul 1967	155 mm14 Jul 2019	298 mm1961 · driest 30 mm in 1962	74
August	41.1°C30 Aug 2000	7.8°C22 Aug 1956	211 mm30 Aug 2005	312 mm2022 · driest 9 mm in 1990	74
September	40.6°C1 Sep 2000	1.7°C29 Sep 1967	168 mm5 Sep 2011	259 mm2011 · driest 2 mm in 1984	74
October	36.7°C6 Oct 1954	-6.1°C29 Oct 1952	131 mm17 Oct 2006	321 mm2019 · driest 0 mm in 1991	73
November	31.1°C2 Nov 2000	-11.7°C30 Nov 1959	115 mm20 Nov 1988	280 mm1977 · driest 9 mm in 1949	74
December	28.9°C7 Dec 1998	-17.8°C23 Dec 1989	143 mm23 Dec 1990	368 mm1961 · driest 23 mm in 1984	73

Typical days per month at PHILA 1 WSW, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	<1	0	13	5
February	2	0	9	4
March	9	<1	4	4
April	17	2	<1	4
May	26	13	0	3
June	29	24	0	4
July	31	28	0	4
August	31	28	0	4
September	28	20	0	3
October	19	6	<1	3
November	5	<1	6	3
December	1	0	12	4

How often, not how much — every day in PHILA 1 WSW’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	13%	27%	15%	29%	10.2–16.8°C
February	21%	27%	15%	28%	12.3–19.3°C
March	43%	26%	15%	25%	16.9–22.9°C
April	67%	22%	13%	20%	22.4–26.4°C
May	76%	22%	11%	22%	26.5–30.0°C
June	77%	23%	11%	24%	30.2–33.8°C
July	73%	27%	14%	30%	31.6–34.6°C
August	78%	22%	10%	21%	31.3–34.8°C
September	82%	18%	9%	13%	28.3–32.6°C
October	76%	15%	8%	11%	23.5–27.3°C
November	41%	20%	11%	17%	17.2–21.9°C
December	16%	24%	13%	26%	12.2–17.4°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.

1950Each stripe is one year’s mean temperature against the 69-year average. Warmest: 2007. Coolest: 1983.2022

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4440906
NOAA station: USC00226894 · PHILA 1 WSW
Station distance: 1.3 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 32.77°, 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 1 WSW is what differs

Pearl River→Union→Coldwater→Bogue Chitto→Deemer→Tucker→

Or put two places side by side: Philadelphia vs Pearl River

Best time to visitPhiladelphia.