United States · 1991–2020

Best time to visit
Belleville.

September leads for comfortable weather in Belleville: typically 24.8°C by day, 11.7°C at night, with 79 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high24.8°C

Typical low11.7°C

Rain in September79 mm

Comfort

September

September · June · August

81climate match

Beach

July

July · August · June

74climate match

Outdoors

May

May · October · September

73climate match

The weakest month is January, scoring 5 against September’s 81 — days reach only 0.5°C, 23° 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

50.5° / -7.8°

Feb

51.9° / -7.4°

Mar

108.3° / -2.6°

Apr

4015.8° / 2.9°

May

6922.2° / 9.1°

Jun

7827.4° / 14.6°

Jul

6829.7° / 16.8°

Aug

7328.4° / 15.9°

Sep

8124.8° / 11.7°

Oct

5217.2° / 5.6°

Nov

2110.1° / 0.4°

Dec

53.1° / -4.5°

Monthly climate evidence for Belleville — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 38 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	0.5°C	-7.8°C	40 mm	6.7	1.2°C	9 h 25	5	Good coverage
February	1.9°C	-7.4°C	37 mm	5.7	0.8°C	10 h 30	5	Good coverage
March	8.3°C	-2.6°C	52 mm	6.9	2.0°C	11 h 48	10	Good coverage
April	15.8°C	2.9°C	78 mm	9.1	6.5°C	13 h 18	40	Good coverage
May	22.2°C	9.1°C	94 mm	9.9	13.2°C	14 h 33	69	Good coverage
June	27.4°C	14.6°C	75 mm	8	19.6°C	15 h 15	78	Good coverage
July	29.7°C	16.8°C	76 mm	8	23.8°C	14 h 58	68	Good coverage
August	28.4°C	15.9°C	79 mm	7.9	24.1°C	13 h 53	73	Good coverage
September	24.8°C	11.7°C	79 mm	7.2	21.1°C	12 h 26	81	Good coverage
October	17.2°C	5.6°C	64 mm	8.4	14.5°C	10 h 59	52	Good coverage
November	10.1°C	0.4°C	57 mm	7	7.9°C	9 h 44	21	Good coverage
December	3.1°C	-4.5°C	47 mm	6.9	3.2°C	9 h 07	5	Good coverage

Records at DETROIT WILLOW RUN AP, 1948–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	20.6°C25 Jan 1950	-27.1°C16 Jan 2009	41 mm12 Jan 1960	106 mm1950 · driest 1 mm in 2022	48
February	22.8°C27 Feb 2024	-27.7°C20 Feb 2015	51 mm16 Feb 1954	110 mm1954 · driest 3 mm in 2015	48
March	31.7°C22 Mar 2012	-21.7°C3 Mar 2003	51 mm25 Mar 1954	111 mm1954 · driest 1 mm in 1999	49
April	30.6°C29 Apr 2025	-10.0°C3 Apr 1954	60 mm20 Apr 2000	156 mm2019 · driest 13 mm in 2004	49
May	36.7°C28 May 2012	-5.0°C10 May 1966	52 mm26 May 1968	185 mm2004 · driest 27 mm in 1967	49
June	40.6°C28 Jun 2012	0.6°C1 Jun 1966	82 mm25 Jun 1968	158 mm2021 · driest 8 mm in 2016	49
July	40.6°C17 Jul 2012	5.6°C1 Jul 1965	77 mm30 Jul 2025	167 mm2023 · driest 18 mm in 2016	49
August	37.2°C27 Aug 1948	4.4°C29 Aug 1965	148 mm24 Aug 2023	220 mm2023 · driest 22 mm in 2008	48
September	37.8°C5 Sep 1954	-1.1°C29 Sep 1961	89 mm11 Sep 2000	166 mm1961 · driest 18 mm in 1956	48
October	33.3°C1 Oct 2019	-6.7°C29 Oct 1965	62 mm3 Oct 1954	165 mm2001 · driest 7 mm in 2005	47
November	27.2°C1 Nov 1950	-16.7°C24 Nov 1950	68 mm15 Nov 2005	136 mm2011 · driest 16 mm in 2009	47
December	19.4°C5 Dec 2001	-23.9°C23 Dec 1960	60 mm21 Dec 1967	123 mm1967 · driest 1 mm in 2017	47

Typical days per month at DETROIT WILLOW RUN AP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	28	1
February	0	0	26	1
March	<1	<1	22	2
April	3	<1	9	3
May	10	3	1	4
June	22	9	0	3
July	28	15	0	2
August	27	11	0	3
September	15	5	0	3
October	3	<1	5	2
November	<1	0	15	2
December	0	0	25	2

How often, not how much — every day in DETROIT WILLOW RUN AP’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%	22%	4%	22%	-3.0–3.6°C
February	<1%	22%	4%	23%	-1.4–5.3°C
March	5%	25%	6%	30%	4.7–11.8°C
April	18%	32%	9%	39%	12.2–17.4°C
May	46%	28%	9%	33%	19.1–24.7°C
June	70%	27%	9%	28%	25.5–29.3°C
July	75%	25%	7%	26%	27.2–31.7°C
August	74%	25%	9%	26%	26.0–30.1°C
September	64%	23%	7%	24%	22.0–26.6°C
October	29%	23%	6%	25%	14.9–20.2°C
November	4%	24%	5%	25%	6.4–12.4°C
December	0%	24%	5%	24%	-0.7–5.9°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.

1948Each stripe is one year’s mean temperature against the 46-year average. Warmest: 2012. Coolest: 1966.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4985601
NOAA station: USW00014853 · DETROIT WILLOW RUN AP
Station distance: 4.9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 21 usable years
Daylight: Calculated from latitude 42.20°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 38 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 DETROIT WILLOW RUN AP is what differs

Canton→Belleville North→Cherry Hill→Denton→Eastlawn→Edgewater Heights→

Or put two places side by side: Belleville vs Canton

Best time to visitBelleville.

September

July

May

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Belleville.

The whole year,
without the guesswork.

Nearby, measured,
and named.