United States · 1991–2020

Best time to visit
Trenton.

September leads for comfortable weather in Trenton: typically 24°C by day, 13.5°C at night, with 96 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high24°C

Typical low13.5°C

Rain in September96 mm

Comfort

September

September · June · August

84climate match

Beach

July

July · August · June

76climate match

Outdoors

May

May · October · September

75climate match

The weakest month is January, scoring 5 against September’s 84 — days reach only 0.1°C, 24° 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

50.1° / -7°

Feb

52.2° / -6°

Mar

57.6° / -2.1°

Apr

3314.6° / 3.5°

May

6621.4° / 9.8°

Jun

7826.8° / 15.6°

Jul

6529° / 18.1°

Aug

7127.8° / 17.4°

Sep

8424° / 13.5°

Oct

5116.6° / 7.3°

Nov

148.8° / 1.3°

Dec

52.9° / -3.6°

Monthly climate evidence for Trenton — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 30 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	0.1°C	-7°C	72 mm	11.5	1.1°C	9 h 25	5	Good coverage
February	2.2°C	-6°C	65 mm	9.5	0.7°C	10 h 30	5	Strong coverage
March	7.6°C	-2.1°C	68 mm	9.4	1.9°C	11 h 48	5	Strong coverage
April	14.6°C	3.5°C	94 mm	11.3	6.4°C	13 h 18	33	Strong coverage
May	21.4°C	9.8°C	95 mm	11.1	13.0°C	14 h 33	66	Strong coverage
June	26.8°C	15.6°C	80 mm	9.2	19.6°C	15 h 14	78	Strong coverage
July	29°C	18.1°C	91 mm	8.9	23.8°C	14 h 58	65	Strong coverage
August	27.8°C	17.4°C	84 mm	8.4	24.1°C	13 h 53	71	Strong coverage
September	24°C	13.5°C	96 mm	8.4	21.2°C	12 h 26	84	Strong coverage
October	16.6°C	7.3°C	75 mm	9	14.7°C	11 h	51	Strong coverage
November	8.8°C	1.3°C	73 mm	9.5	7.9°C	9 h 44	14	Good coverage
December	2.9°C	-3.6°C	63 mm	9.9	3.3°C	9 h 07	5	Good coverage

Records at AMHERSTBURG, 1988–2024
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	15.0°C14 Jan 1995	-28.0°C19 Jan 1994	47 mm27 Jan 1994	133 mm2024 · driest 18 mm in 2022	34
February	20.5°C23 Feb 2017	-22.5°C10 Feb 1994	53 mm22 Feb 1990	125 mm1990 · driest 12 mm in 1989	32
March	26.5°C27 Mar 2007	-20.5°C3 Mar 2003	44 mm8 Mar 1998	136 mm2016 · driest 2 mm in 2013	33
April	30.0°C25 Apr 1990	-8.5°C5 Apr 2016	60 mm20 Apr 2000	139 mm1999 · driest 28 mm in 2008	35
May	33.5°C29 May 2018	-2.0°C4 May 2005	68 mm30 May 2015	206 mm2015 · driest 18 mm in 2013	34
June	36.0°C25 Jun 2005	5.0°C1 Jun 2003	57 mm20 Jun 2021	174 mm2015 · driest 23 mm in 2011	35
July	38.5°C17 Jul 2012	8.0°C2 Jul 2001	89 mm19 Jul 1989	198 mm1989 · driest 23 mm in 2007	36
August	37.0°C17 Aug 1988	8.0°C6 Aug 1994	93 mm23 Aug 2023	187 mm2007 · driest 11 mm in 2010	36
September	35.0°C2 Sep 2011	1.0°C30 Sep 1993	117 mm6 Sep 1990	187 mm1990 · driest 23 mm in 2023	35
October	31.5°C1 Oct 2019	-5.0°C31 Oct 1988	53 mm25 Oct 1991	168 mm2021 · driest 20 mm in 2022	34
November	24.0°C1 Nov 2016	-11.0°C13 Nov 2019	48 mm30 Nov 2006	161 mm2017 · driest 5 mm in 2007	31
December	18.0°C3 Dec 1998	-22.5°C22 Dec 1989	42 mm29 Dec 1990	143 mm1990 · driest 24 mm in 1995	30

Typical days per month at AMHERSTBURG, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	24	2	6
February	0	0	23	2	5
March	<1	0	20	2	3
April	2	0	7	3	1
May	8	2	<1	3	0
June	19	7	0	3	0
July	25	11	0	3	0
August	24	8	0	3	0
September	12	3	0	3	0
October	2	<1	2	2	0
November	0	0	12	3	2
December	0	0	23	2	4

How often, not how much — every day in AMHERSTBURG’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	0%	36%	6%	41%	-3.0–4.0°C
February	0%	32%	7%	35%	-0.8–5.5°C
March	3%	31%	8%	42%	5.0–11.2°C
April	13%	38%	10%	54%	12.3–16.7°C
May	38%	34%	10%	42%	18.7–23.9°C
June	67%	30%	10%	35%	25.2–28.5°C
July	71%	29%	10%	35%	27.1–31.3°C
August	72%	27%	10%	25%	25.7–29.7°C
September	60%	27%	10%	30%	22.1–25.7°C
October	21%	30%	8%	31%	14.8–18.8°C
November	2%	31%	8%	40%	5.7–12.0°C
December	0%	33%	7%	42%	0.1–6.3°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.

1989Each stripe is one year’s mean temperature against the 26-year average. Warmest: 1998. Coolest: 1989.2023

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5012521
NOAA station: CA006130257 · AMHERSTBURG
Station distance: 7.8 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 23 usable years
Daylight: Calculated from latitude 42.14°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 30 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 AMHERSTBURG is what differs

Wyandotte→Amherstburg→Woodhaven→Riverview→Grosse Ile→Gibraltar→

Or put two places side by side: Trenton vs Wyandotte

Best time to visitTrenton.

September

July

May

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Trenton.

The whole year,
without the guesswork.

Nearby, measured,
and named.