United States · 1991–2020

Best time to visit
Marcus Hook.

May leads for comfortable weather in Marcus Hook: typically 23.1°C by day, 13.2°C at night, with 66 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortMay

Typical high23.1°C

Typical low13.2°C

Rain in May66 mm

Comfort

May

May · September · June

85climate match

Beach

August

August · June · July

83climate match

Outdoors

October

October · April · May

83climate match

The weakest month is January, scoring 5 against May’s 85 — days reach only 5.3°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

55.3° / -2°

Feb

117.1° / -1°

Mar

2511.3° / 2.5°

Apr

5718.1° / 8°

May

8523.1° / 13.2°

Jun

7028.1° / 18.5°

Jul

5130.8° / 21.5°

Aug

6029.6° / 20.7°

Sep

7625.5° / 16.6°

Oct

6419° / 10.2°

Nov

3913.2° / 5.3°

Dec

107.6° / 0.6°

Monthly climate evidence for Marcus Hook — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	5.3°C	-2°C	68 mm	6.5	9 h 38	5	Good coverage
February	7.1°C	-1°C	49 mm	5.7	10 h 38	11	Good coverage
March	11.3°C	2.5°C	84 mm	7.4	11 h 49	25	Good coverage
April	18.1°C	8°C	78 mm	7.9	13 h 12	57	Good coverage
May	23.1°C	13.2°C	66 mm	7.5	14 h 21	85	Good coverage
June	28.1°C	18.5°C	80 mm	7.1	14 h 58	70	Good coverage
July	30.8°C	21.5°C	115 mm	7.1	14 h 44	51	Good coverage
August	29.6°C	20.7°C	94 mm	6.6	13 h 44	60	Good coverage
September	25.5°C	16.6°C	124 mm	7.7	12 h 24	76	Good coverage
October	19°C	10.2°C	88 mm	6.4	11 h 05	64	Good coverage
November	13.2°C	5.3°C	69 mm	6.8	9 h 55	39	Good coverage
December	7.6°C	0.6°C	78 mm	7.2	9 h 22	10	Good coverage

Records at MARCUS HOOK, 1919–2013
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	23.9°C6 Jan 1946	-20.0°C19 Jan 1994	70 mm3 Jan 1936	214 mm1979 · driest 7 mm in 1992	85
February	23.9°C27 Feb 1946	-24.4°C9 Feb 1934	67 mm20 Feb 1981	173 mm1971 · driest 5 mm in 1998	86
March	32.8°C29 Mar 1945	-12.2°C19 Mar 1967	83 mm4 Mar 1940	185 mm2010 · driest 14 mm in 2012	82
April	35.0°C17 Apr 2002	-11.7°C1 Apr 1923	90 mm2 Apr 2005	277 mm1973 · driest 3 mm in 1994	84
May	38.9°C27 May 1941	1.7°C10 May 1966	121 mm4 May 1934	292 mm1947 · driest 0 mm in 1986	84
June	40.0°C30 Jun 1934	7.2°C8 Jun 1932	123 mm28 Jun 1938	246 mm2013 · driest 4 mm in 1986	82
July	42.2°C9 Jul 1936	12.2°C4 Jul 1933	191 mm5 Jul 1989	375 mm1919 · driest 17 mm in 1992	85
August	41.1°C27 Aug 1948	8.9°C13 Aug 1941	151 mm14 Aug 1942	330 mm2011 · driest 6 mm in 1993	84
September	38.3°C11 Sep 1931	3.9°C24 Sep 1963	297 mm16 Sep 1999	410 mm1999 · driest 1 mm in 2005	84
October	36.1°C5 Oct 1941	-1.7°C26 Oct 1936	118 mm8 Oct 2005	220 mm2005 · driest 2 mm in 1963	86
November	30.6°C1 Nov 1950	-10.6°C30 Nov 1936	118 mm25 Nov 1950	235 mm1972 · driest 7 mm in 1976	85
December	23.3°C4 Dec 1998	-16.1°C31 Dec 1962	60 mm13 Dec 1941	196 mm1973 · driest 7 mm in 1989	85

Typical days per month at MARCUS HOOK, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	20	2	<1
February	0	0	17	2	<1
March	<1	0	9	3	<1
April	4	<1	<1	3	<1
May	12	3	0	2	0
June	24	11	0	2	0
July	29	19	0	3	0
August	29	16	0	3	0
September	18	4	0	3	0
October	4	<1	0	3	0
November	<1	0	3	2	0
December	0	0	14	3	<1

How often, not how much — every day in MARCUS HOOK’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%	25%	8%	24%	1.8–9.1°C
February	<1%	23%	9%	21%	3.8–9.4°C
March	8%	27%	11%	30%	8.7–14.6°C
April	30%	28%	10%	30%	15.6–20.5°C
May	61%	28%	10%	31%	20.9–26.8°C
June	74%	25%	10%	26%	26.7–30.9°C
July	77%	24%	10%	24%	28.9–33.0°C
August	77%	23%	10%	21%	28.0–31.7°C
September	73%	22%	9%	20%	24.1–28.4°C
October	41%	19%	8%	15%	17.7–21.9°C
November	8%	23%	9%	20%	10.8–15.4°C
December	<1%	24%	10%	24%	4.1–10.2°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.

1920Each stripe is one year’s mean temperature against the 70-year average. Warmest: 1946. Coolest: 1967.2012

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4559431
NOAA station: USC00365390 · MARCUS HOOK
Station distance: 1.1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 18 usable years
Daylight: Calculated from latitude 39.82°, 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 MARCUS HOOK is what differs

Chester→Woodlyn→Claymont→Brookhaven→Village Green-Green Ridge→Swarthmore→

Or put two places side by side: Marcus Hook vs Chester

Best time to visitMarcus Hook.

May

August

October

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Marcus Hook.

The whole year,
without the guesswork.

Nearby, measured,
and named.