United States · 1991–2020

Best time to visit
Dunkirk.

May leads for comfortable weather in Dunkirk: typically 23.9°C by day, 11.9°C at night, with 95 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortMay

Typical high23.9°C

Typical low11.9°C

Rain in May95 mm

Comfort

May

May · September · June

81climate match

Beach

July

July · August · June

74climate match

Outdoors

October

October · April · May

80climate match

The weakest month is January, scoring 5 against May’s 81 — days reach only 6.6°C, 17° below the 24°C the score treats as ideal, and nights drop to -4.2°C.

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

56.6° / -4.2°

Feb

68.2° / -3.6°

Mar

2312.8° / 0.3°

Apr

5519° / 6.2°

May

8123.9° / 11.9°

Jun

6528.6° / 17.1°

Jul

5630.8° / 19.3°

Aug

6030.2° / 18.4°

Sep

7726.5° / 14.3°

Oct

6220.2° / 7.2°

Nov

3714.4° / 2°

Dec

79° / -1.7°

Monthly climate evidence for Dunkirk — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 27 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	6.6°C	-4.2°C	74 mm	7.8	3.5°C	9 h 44	5	Good coverage
February	8.2°C	-3.6°C	64 mm	7.5	2.6°C	10 h 41	6	Good coverage
March	12.8°C	0.3°C	100 mm	8.5	4.3°C	11 h 50	23	Good coverage
April	19°C	6.2°C	87 mm	8.7	8.6°C	13 h 09	55	Good coverage
May	23.9°C	11.9°C	95 mm	8.6	14.1°C	14 h 16	81	Good coverage
June	28.6°C	17.1°C	110 mm	9.1	20.2°C	14 h 51	65	Good coverage
July	30.8°C	19.3°C	99 mm	7.9	24.7°C	14 h 37	56	Good coverage
August	30.2°C	18.4°C	101 mm	7.4	25.7°C	13 h 40	60	Good coverage
September	26.5°C	14.3°C	111 mm	6.7	23.4°C	12 h 23	77	Good coverage
October	20.2°C	7.2°C	97 mm	6.5	18.5°C	11 h 07	62	Good coverage
November	14.4°C	2°C	72 mm	5.9	12.4°C	10 h 01	37	Good coverage
December	9°C	-1.7°C	92 mm	8.5	7.3°C	9 h 28	7	Good coverage

Records at UPPER MARLBORO 3 NNW, 1956–2016
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	23.9°C5 Jan 2004	-24.4°C22 Jan 1984	57 mm1 Jan 1976	213 mm1978 · driest 14 mm in 1981	58
February	26.7°C25 Feb 1985	-22.2°C6 Feb 1996	76 mm5 Feb 1998	166 mm1998 · driest 7 mm in 2009	58
March	31.7°C31 Mar 1998	-16.7°C11 Mar 1960	54 mm29 Mar 1984	218 mm1993 · driest 2 mm in 2006	57
April	35.0°C18 Apr 2002	-7.8°C1 Apr 1969	61 mm21 Apr 2008	240 mm1983 · driest 9 mm in 1985	57
May	36.1°C31 May 1991	-2.2°C11 May 1966	131 mm12 May 2008	300 mm2008 · driest 21 mm in 1986	57
June	40.0°C30 Jun 2012	3.9°C11 Jun 1972	125 mm22 Jun 1972	264 mm2015 · driest 14 mm in 1988	56
July	40.6°C8 Jul 2012	6.1°C1 Jul 1988	103 mm14 Jul 1975	265 mm1958 · driest 15 mm in 1966	58
August	38.9°C21 Aug 1983	3.9°C29 Aug 1982	134 mm28 Aug 2011	297 mm1971 · driest 17 mm in 1962	58
September	37.2°C12 Sep 1983	-1.1°C24 Sep 1974	190 mm8 Sep 2011	357 mm1975 · driest 14 mm in 2005	59
October	33.9°C10 Oct 2007	-6.7°C24 Oct 1969	144 mm30 Oct 2012	212 mm2012 · driest 0 mm in 1963	58
November	29.4°C2 Nov 1974	-10.6°C27 Nov 1974	68 mm7 Nov 1963	175 mm1963 · driest 6 mm in 2012	57
December	26.7°C7 Dec 1998	-17.2°C14 Dec 1960	62 mm25 Dec 1986	181 mm2009 · driest 12 mm in 1965	57

Typical days per month at UPPER MARLBORO 3 NNW, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	25	3	3
February	0	0	23	2	3
March	1	<1	16	4	1
April	6	1	3	3	<1
May	14	5	0	3	0
June	25	13	0	4	0
July	30	20	0	3	0
August	29	18	0	3	0
September	20	7	0	3	0
October	6	<1	2	3	0
November	<1	0	13	2	<1
December	<1	0	22	3	1

How often, not how much — every day in UPPER MARLBORO 3 NNW’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	2%	26%	9%	28%	3.2–9.0°C
February	3%	27%	8%	28%	3.6–10.9°C
March	11%	27%	10%	30%	9.4–15.0°C
April	31%	29%	10%	34%	16.6–21.1°C
May	59%	29%	10%	36%	21.8–25.7°C
June	71%	28%	11%	32%	26.6–29.5°C
July	72%	28%	11%	31%	29.1–32.3°C
August	75%	25%	10%	24%	28.4–31.3°C
September	74%	23%	10%	23%	24.7–28.4°C
October	44%	21%	9%	21%	18.4–21.9°C
November	15%	23%	9%	23%	11.8–17.1°C
December	3%	26%	10%	28%	5.3–12.0°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.

1957Each stripe is one year’s mean temperature against the 51-year average. Warmest: 2012. Coolest: 1958.2015

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4353798
NOAA station: USC00189070 · UPPER MARLBORO 3 NNW
Station distance: 17.2 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 21 usable years
Daylight: Calculated from latitude 38.72°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 27 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 UPPER MARLBORO 3 NNW is what differs

Greater Upper Marlboro→Kettering→Forestville→Largo→Rosaryville→Brock Hall→

Or put two places side by side: Dunkirk vs Greater Upper Marlboro

Best time to visitDunkirk.

May

July

October

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Dunkirk.

The whole year,
without the guesswork.

Nearby, measured,
and named.