United States · 1991–2020

Best time to visit
Plainsboro Center.

September leads for comfortable weather in Plainsboro Center: typically 25.7°C by day, 12.6°C at night, with 104 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.7°C

Typical low12.6°C

Rain in September104 mm

Comfort

September

September · May · June

77climate match

Beach

August

August · July · June

67climate match

Outdoors

October

October · May · April

74climate match

The weakest month is January, scoring 5 against September’s 77 — days reach only 4.7°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

54.7° / -5.3°

Feb

56.1° / -4.5°

Mar

1110.5° / -0.7°

Apr

4517.2° / 4.5°

May

7022.6° / 9.7°

Jun

7027.6° / 14.9°

Jul

5630.4° / 17.8°

Aug

6429.4° / 16.5°

Sep

7725.7° / 12.6°

Oct

5419.1° / 6.3°

Nov

2813° / 1.2°

Dec

57.5° / -2.4°

Monthly climate evidence for Plainsboro Center — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	4.7°C	-5.3°C	88 mm	8.8	9 h 35	5	Strong coverage
February	6.1°C	-4.5°C	68 mm	7.7	10 h 36	5	Strong coverage
March	10.5°C	-0.7°C	108 mm	9.2	11 h 49	11	Strong coverage
April	17.2°C	4.5°C	94 mm	9.1	13 h 13	45	Strong coverage
May	22.6°C	9.7°C	104 mm	10	14 h 23	70	Strong coverage
June	27.6°C	14.9°C	118 mm	9.5	15 h 02	70	Strong coverage
July	30.4°C	17.8°C	123 mm	8.9	14 h 47	56	Strong coverage
August	29.4°C	16.5°C	112 mm	8.5	13 h 46	64	Strong coverage
September	25.7°C	12.6°C	104 mm	7.2	12 h 25	77	Strong coverage
October	19.1°C	6.3°C	101 mm	7.9	11 h 04	54	Strong coverage
November	13°C	1.2°C	82 mm	7.2	9 h 53	28	Strong coverage
December	7.5°C	-2.4°C	107 mm	8.9	9 h 18	5	Strong coverage

What has changed

Plainsboro Center runs +1.5°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

+2.3

Mar

+1.0

Apr

+1.5

May

+0.9

Jun

+1.0

Jul

+2.1

Aug

+1.3

Sep

+1.8

Oct

+1.4

Nov

+0.7

Dec

+2.5

September daytime highs, 2011–2025. Last recorded: 27.1°C.

Records at HIGHTSTOWN 2 W, 1891–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	22.8°C14 Jan 1932	-26.7°C28 Jan 1935	69 mm13 Jan 1915	220 mm1979 · driest 9 mm in 1981	128
February	25.0°C22 Feb 2018	-23.9°C7 Feb 1907	77 mm6 Feb 1896	193 mm2018 · driest 15 mm in 2009	129
March	31.1°C31 Mar 1998	-16.7°C19 Mar 1967	65 mm13 Mar 1953	229 mm2010 · driest 16 mm in 1910	131
April	35.0°C18 Apr 2002	-12.2°C1 Apr 1923	139 mm16 Apr 2007	290 mm2007 · driest 21 mm in 1963	132
May	36.1°C27 May 1914	-2.2°C1 May 1978	104 mm1 May 2014	248 mm2018 · driest 14 mm in 1964	132
June	37.8°C25 Jun 2025	1.7°C1 Jun 1938	135 mm27 Jun 1938	271 mm2013 · driest 1 mm in 1949	131
July	40.6°C9 Jul 1936	5.6°C3 Jul 1929	141 mm6 Jul 1989	310 mm1897 · driest 3 mm in 1955	128
August	38.9°C10 Aug 2001	4.4°C30 Aug 1986	200 mm28 Aug 2011	490 mm2011 · driest 7 mm in 1964	130
September	39.4°C2 Sep 1953	-0.6°C25 Sep 1963	142 mm17 Sep 1999	297 mm1975 · driest 1 mm in 1941	129
October	35.0°C5 Oct 1941	-5.6°C21 Oct 1930	151 mm9 Oct 1903	304 mm2005 · driest 0 mm in 2024	132
November	28.3°C1 Nov 2024	-17.8°C26 Nov 1938	101 mm15 Nov 1892	241 mm2018 · driest 9 mm in 1976	132
December	24.4°C8 Dec 1998	-24.4°C30 Dec 1917	81 mm18 Dec 2023	225 mm2023 · driest 3 mm in 1955	131

Typical days per month at HIGHTSTOWN 2 W, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	26	3	3
February	0	0	24	2	3
March	<1	0	19	4	2
April	4	<1	5	3	<1
May	11	4	<1	3	0
June	22	10	0	4	0
July	29	19	0	4	0
August	28	15	0	3	0
September	18	5	0	3	0
October	4	<1	3	3	0
November	<1	0	14	3	<1
December	0	0	23	4	2

How often, not how much — every day in HIGHTSTOWN 2 W’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%	28%	0.5–7.5°C
February	<1%	28%	10%	30%	1.9–8.8°C
March	7%	30%	12%	34%	7.4–13.5°C
April	23%	30%	11%	36%	14.9–19.1°C
May	54%	30%	10%	38%	20.6–24.9°C
June	68%	30%	11%	32%	25.6–29.2°C
July	71%	29%	13%	32%	28.3–31.8°C
August	71%	28%	12%	28%	27.1–30.6°C
September	70%	23%	10%	21%	23.5–27.2°C
October	37%	22%	9%	20%	17.2–21.4°C
November	7%	25%	10%	24%	10.2–15.2°C
December	<1%	26%	11%	27%	3.1–9.3°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.

1893Each stripe is one year’s mean temperature against the 121-year average. Warmest: 2024. Coolest: 1907.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5102729
NOAA station: USC00283951 · HIGHTSTOWN 2 W
Station distance: 7.7 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 40.33°, 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 HIGHTSTOWN 2 W is what differs

Princeton→Mercerville-Hamilton Square→Princeton Meadows→Mercerville→Hamilton Square→Twin Rivers→

Or put two places side by side: Plainsboro Center vs Princeton

Best time to visitPlainsboro Center.