United States · 1991–2020

Best time to visit
Bivalve.

September leads for comfortable weather in Bivalve: typically 25.8°C by day, 14.2°C at night, with 80 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.8°C

Typical low14.2°C

Rain in September80 mm

Comfort

September

September · May · June

83climate match

Beach

July

July · August · June

73climate match

Outdoors

October

October · May · April

80climate match

The weakest month is January, scoring 5 against September’s 83 — days reach only 5.9°C, 18° 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

55.9° / -4.4°

Feb

57.2° / -4°

Mar

1711.5° / -0.2°

Apr

4917.8° / 4.9°

May

7723° / 10.4°

Jun

7327.8° / 15.9°

Jul

5730.3° / 19.2°

Aug

6229.3° / 18.2°

Sep

8325.8° / 14.2°

Oct

6119.6° / 7.4°

Nov

3313.6° / 1.8°

Dec

58.4° / -2.1°

Monthly climate evidence for Bivalve — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 15 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	5.9°C	-4.4°C	75 mm	7.1	4.0°C	9 h 41	5	Strong coverage
February	7.2°C	-4°C	67 mm	6.9	2.9°C	10 h 39	5	Strong coverage
March	11.5°C	-0.2°C	104 mm	8.5	5.0°C	11 h 50	17	Strong coverage
April	17.8°C	4.9°C	90 mm	8.2	9.1°C	13 h 10	49	Strong coverage
May	23°C	10.4°C	79 mm	8.4	14.1°C	14 h 18	77	Strong coverage
June	27.8°C	15.9°C	99 mm	7.9	19.6°C	14 h 55	73	Strong coverage
July	30.3°C	19.2°C	110 mm	8.1	23.2°C	14 h 40	57	Strong coverage
August	29.3°C	18.2°C	119 mm	7.1	24.2°C	13 h 42	62	Strong coverage
September	25.8°C	14.2°C	80 mm	6.4	22.7°C	12 h 24	83	Strong coverage
October	19.6°C	7.4°C	92 mm	6.5	18.1°C	11 h 06	61	Strong coverage
November	13.6°C	1.8°C	79 mm	6.5	12.1°C	9 h 58	33	Strong coverage
December	8.4°C	-2.1°C	100 mm	8.6	7.4°C	9 h 25	5	Strong coverage

What has changed

Bivalve runs +1.2°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

+1.7

Feb

+2.1

Mar

+1.2

Apr

+1.4

May

+0.7

Jun

+0.9

Jul

+1.2

Aug

+0.3

Sep

+1.0

Oct

+1.2

Nov

+0.6

Dec

+2.2

September daytime highs, 2011–2025. Last recorded: 25.9°C.

Records at MILLVILLE MUNI AP, 1943–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	23.3°C26 Jan 1950	-23.3°C22 Jan 1961	78 mm3 Jan 1999	199 mm1999 · driest 5 mm in 1981	78
February	24.4°C21 Feb 2018	-21.1°C6 Feb 1996	67 mm24 Feb 1979	194 mm1971 · driest 13 mm in 2006	78
March	30.0°C21 Mar 1948	-21.7°C4 Mar 2009	74 mm23 Mar 2024	257 mm1994 · driest 4 mm in 2006	79
April	33.9°C26 Apr 2009	-8.3°C1 Apr 1965	95 mm15 Apr 2007	221 mm2023 · driest 14 mm in 1985	79
May	35.6°C30 May 1991	-1.7°C1 May 2000	68 mm10 May 1989	218 mm1948 · driest 20 mm in 1977	79
June	38.3°C24 Jun 2025	3.3°C1 Jun 1945	111 mm12 Jun 1968	324 mm2015 · driest 6 mm in 1949	79
July	39.4°C6 Jul 2010	6.7°C1 Jul 1988	126 mm28 Jul 1969	328 mm1969 · driest 12 mm in 1943	79
August	38.3°C31 Aug 1953	6.7°C29 Aug 1982	230 mm20 Aug 1997	324 mm2011 · driest 17 mm in 2025	79
September	36.1°C2 Sep 1953	1.7°C24 Sep 1963	105 mm12 Sep 1960	210 mm1944 · driest 7 mm in 2005	79
October	36.1°C2 Oct 2019	-6.1°C24 Oct 1969	129 mm29 Oct 2012	194 mm2005 · driest 0 mm in 2024	79
November	28.9°C1 Nov 1950	-11.1°C24 Nov 1989	91 mm25 Nov 1950	218 mm1972 · driest 1 mm in 2017	78
December	25.0°C7 Dec 1998	-16.7°C25 Dec 1980	78 mm10 Dec 2023	236 mm1969 · driest 0 mm in 2021	78

Typical days per month at MILLVILLE MUNI AP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	24	3	1
February	0	0	22	2	2
March	<1	0	17	4	<1
April	4	<1	6	3	<1
May	11	3	<1	3	0
June	24	10	0	3	0
July	29	18	0	4	0
August	29	14	0	3	0
September	19	4	0	2	0
October	4	<1	2	3	0
November	<1	0	13	3	<1
December	0	0	22	3	<1

How often, not how much — every day in MILLVILLE MUNI 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	<1%	26%	9%	28%	2.0–8.6°C
February	2%	27%	10%	28%	3.7–10.2°C
March	8%	27%	11%	31%	8.7–14.2°C
April	25%	28%	10%	30%	15.2–19.6°C
May	57%	27%	10%	31%	20.9–24.6°C
June	74%	25%	9%	24%	26.0–29.1°C
July	76%	24%	10%	24%	28.6–31.7°C
August	77%	24%	10%	22%	27.6–30.3°C
September	74%	21%	8%	19%	23.9–27.2°C
October	41%	20%	8%	17%	17.8–21.6°C
November	10%	23%	10%	22%	11.4–15.7°C
December	1%	26%	10%	28%	4.5–10.9°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.

1944Each stripe is one year’s mean temperature against the 74-year average. Warmest: 1998. Coolest: 1967.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4500840
NOAA station: USW00013735 · MILLVILLE MUNI AP
Station distance: 15.1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 39.23°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 15 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 MILLVILLE MUNI AP is what differs

South Vineland→Millville→Laurel Lake→Port Norris→Cedarville→Baileytown→

Or put two places side by side: Bivalve vs South Vineland

Best time to visitBivalve.

September

July

October

The whole year,without the guesswork.

Bivalve runs +1.2°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Bivalve.

The whole year,
without the guesswork.

Bivalve runs +1.2°C
on the 1961–1990 baseline.

Nearby, measured,
and named.