United States · 1991–2020

Best time to visit
Harlem.

September leads for comfortable weather in Harlem: typically 24.7°C by day, 16.5°C at night, with 110 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high24.7°C

Typical low16.5°C

Rain in September110 mm

Comfort

September

September · May · June

81climate match

Beach

July

July · August · June

78climate match

Outdoors

October

October · May · April

75climate match

The weakest month is January, scoring 5 against September’s 81 — days reach only 4.3°C, 20° 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

54.3° / -2.6°

Feb

55.8° / -1.7°

Mar

1410.1° / 1.8°

Apr

4716.7° / 7.2°

May

7422° / 12.5°

Jun

7026.6° / 17.7°

Jul

5529.5° / 20.9°

Aug

5928.6° / 20.2°

Sep

8124.7° / 16.5°

Oct

5818.2° / 10.5°

Nov

3212.4° / 5.3°

Dec

57° / 0.7°

Monthly climate evidence for Harlem — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 21 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	4.3°C	-2.6°C	93 mm	8.7	6.0°C	9 h 33	5	Strong coverage
February	5.8°C	-1.7°C	81 mm	7.6	4.3°C	10 h 35	5	Strong coverage
March	10.1°C	1.8°C	109 mm	9.1	4.8°C	11 h 49	14	Strong coverage
April	16.7°C	7.2°C	104 mm	9	7.9°C	13 h 14	47	Strong coverage
May	22°C	12.5°C	101 mm	9.6	12.6°C	14 h 26	74	Strong coverage
June	26.6°C	17.7°C	115 mm	9	18.1°C	15 h 05	70	Strong coverage
July	29.5°C	20.9°C	117 mm	8.3	22.2°C	14 h 50	55	Strong coverage
August	28.6°C	20.2°C	116 mm	8.2	23.1°C	13 h 48	59	Strong coverage
September	24.7°C	16.5°C	110 mm	7.2	21.4°C	12 h 25	81	Strong coverage
October	18.2°C	10.5°C	111 mm	7.4	17.3°C	11 h 03	58	Strong coverage
November	12.4°C	5.3°C	91 mm	7.2	12.7°C	9 h 51	32	Strong coverage
December	7°C	0.7°C	111 mm	9.1	9.0°C	9 h 16	5	Strong coverage

What has changed

Harlem runs +0.7°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

+1.4

Feb

+1.8

Mar

+0.8

Apr

+0.6

May

0.0

Jun

0.0

Jul

+0.6

Aug

-0.1

Sep

+0.5

Oct

+0.3

Nov

+0.3

Dec

+1.9

September daytime highs, 2011–2025. Last recorded: 25.5°C.

Records at NY CITY CNTRL PARK, 1869–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	22.2°C26 Jan 1950	-21.1°C24 Jan 1882	88 mm21 Jan 1979	267 mm1979 · driest 15 mm in 1981	158
February	25.6°C21 Feb 2018	-26.1°C9 Feb 1934	78 mm20 Feb 1898	175 mm1869 · driest 12 mm in 1895	158
March	30.0°C29 Mar 1945	-16.1°C5 Mar 1872	108 mm25 Mar 1876	272 mm2010 · driest 20 mm in 2006	158
April	35.6°C18 Apr 1976	-11.1°C1 Apr 1923	192 mm15 Apr 2007	356 mm1983 · driest 24 mm in 1881	158
May	37.2°C19 May 1962	0.0°C6 May 1891	101 mm29 May 1968	260 mm1989 · driest 8 mm in 1903	158
June	38.3°C27 Jun 1966	6.7°C1 Jun 1945	109 mm26 Jun 1884	261 mm2003 · driest 1 mm in 1949	158
July	41.1°C9 Jul 1936	11.1°C1 Jul 1943	95 mm24 Jul 1997	302 mm1889 · driest 11 mm in 1999	158
August	40.0°C7 Aug 1918	10.0°C29 Aug 1965	148 mm14 Aug 2011	481 mm2011 · driest 5 mm in 1995	157
September	38.9°C2 Sep 1953	3.9°C30 Sep 1912	210 mm23 Sep 1882	428 mm1882 · driest 5 mm in 1884	157
October	34.4°C5 Oct 1941	-2.2°C27 Oct 1936	186 mm9 Oct 1903	425 mm2005 · driest 0 mm in 2024	157
November	28.9°C1 Nov 1950	-15.0°C30 Nov 1875	188 mm8 Nov 1977	315 mm1972 · driest 9 mm in 1976	157
December	23.9°C7 Dec 1998	-25.0°C30 Dec 1917	77 mm13 Dec 1909	254 mm1973 · driest 6 mm in 1955	157

Typical days per month at NY CITY CNTRL PARK, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	21	3	4
February	0	0	18	3	3
March	<1	0	11	3	2
April	3	<1	1	3	<1
May	9	3	0	3	0
June	21	7	0	4	0
July	29	15	0	4	0
August	27	11	0	4	0
September	15	3	0	3	0
October	3	<1	0	3	0
November	<1	0	4	3	<1
December	0	0	14	4	2

How often, not how much — every day in NY CITY CNTRL PARK’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%	28%	10%	31%	0.1–6.7°C
February	<1%	28%	10%	33%	1.1–7.7°C
March	4%	29%	11%	34%	5.4–12.3°C
April	18%	29%	10%	36%	12.8–18.0°C
May	49%	29%	10%	35%	19.4–24.0°C
June	69%	28%	10%	31%	24.4–28.1°C
July	72%	28%	12%	29%	27.3–30.7°C
August	74%	26%	11%	26%	26.1–30.0°C
September	67%	23%	10%	22%	22.2–26.1°C
October	30%	21%	9%	20%	15.8–20.5°C
November	4%	24%	10%	24%	9.2–14.0°C
December	<1%	27%	10%	29%	2.4–8.4°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.

1869Each stripe is one year’s mean temperature against the 157-year average. Warmest: 2024. Coolest: 1875.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5120034
NOAA station: USW00094728 · NY CITY CNTRL PARK
Station distance: 3.8 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 40.81°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 21 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
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 NY CITY CNTRL PARK is what differs

New York City→Manhattan→Upper West Side→Astoria→East Harlem→Chinatown→

Or put two places side by side: Harlem vs New York City

Best time to visitHarlem.