United States · 1991–2020

Best time to visit
Lewes.

May leads for comfortable weather in Lewes: typically 23.3°C by day, 12.7°C at night, with 88 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortMay

Typical high23.3°C

Typical low12.7°C

Rain in May88 mm

Comfort

May

May · September · October

81climate match

Beach

August

August · June · July

80climate match

Outdoors

October

October · April · May

79climate match

The weakest month is January, scoring 6 against May’s 81 — days reach only 8°C, 16° 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

68° / -0.6°

Feb

139° / -0.3°

Mar

2612.9° / 3.1°

Apr

5618.6° / 7.9°

May

8123.3° / 12.7°

Jun

6628.4° / 18.4°

Jul

4930.8° / 21.2°

Aug

5729.7° / 20.6°

Sep

7426.1° / 17.4°

Oct

6720.6° / 10.8°

Nov

4014.8° / 5.7°

Dec

129.9° / 1.3°

Monthly climate evidence for Lewes — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 11 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	8°C	-0.6°C	90 mm	8.8	4.3°C	9 h 44	6	Good coverage
February	9°C	-0.3°C	77 mm	8.1	3.1°C	10 h 41	13	Good coverage
March	12.9°C	3.1°C	107 mm	9.1	5.1°C	11 h 50	26	Good coverage
April	18.6°C	7.9°C	91 mm	8.8	9.0°C	13 h 09	56	Good coverage
May	23.3°C	12.7°C	88 mm	8.3	14.0°C	14 h 16	81	Good coverage
June	28.4°C	18.4°C	95 mm	8.2	19.6°C	14 h 52	66	Good coverage
July	30.8°C	21.2°C	126 mm	8.3	23.1°C	14 h 38	49	Good coverage
August	29.7°C	20.6°C	107 mm	7.3	24.0°C	13 h 40	57	Good coverage
September	26.1°C	17.4°C	113 mm	7.3	22.6°C	12 h 23	74	Good coverage
October	20.6°C	10.8°C	108 mm	7.5	18.2°C	11 h 07	67	Good coverage
November	14.8°C	5.7°C	96 mm	7.7	12.4°C	10 h 00	40	Good coverage
December	9.9°C	1.3°C	111 mm	9.3	7.7°C	9 h 28	12	Good coverage

Records at LEWES, 1945–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	25.6°C25 Jan 1950	-23.9°C17 Jan 1982	87 mm28 Jan 1998	236 mm1948 · driest 8 mm in 1981	71
February	30.0°C27 Feb 1997	-17.8°C2 Feb 1971	54 mm15 Feb 1953	174 mm1979 · driest 23 mm in 2009	70
March	31.7°C30 Mar 1998	-12.8°C3 Mar 1950	87 mm6 Mar 1979	200 mm1984 · driest 3 mm in 2006	70
April	33.3°C21 Apr 1957	-7.8°C7 Apr 1982	96 mm13 Apr 2004	221 mm1983 · driest 14 mm in 1985	71
May	36.1°C19 May 1997	-2.8°C9 May 1947	103 mm30 May 1948	372 mm1948 · driest 5 mm in 1964	70
June	38.9°C21 Jun 1997	3.9°C5 Jun 1947	127 mm25 Jun 2006	258 mm2006 · driest 7 mm in 1971	72
July	38.3°C15 Jul 1995	8.3°C2 Jul 1965	132 mm10 Jul 2020	286 mm1989 · driest 17 mm in 1974	71
August	38.3°C16 Aug 1997	8.3°C30 Aug 1986	177 mm14 Aug 1953	349 mm1967 · driest 15 mm in 1995	70
September	36.7°C11 Sep 1983	2.8°C25 Sep 1950	130 mm1 Sep 2002	206 mm1999 · driest 11 mm in 2024	71
October	33.3°C4 Oct 1954	-3.3°C31 Oct 1966	88 mm31 Oct 1956	217 mm2005 · driest 0 mm in 2024	70
November	31.1°C1 Nov 1950	-8.9°C29 Nov 1955	97 mm25 Nov 1950	195 mm1948 · driest 15 mm in 2001	71
December	25.0°C7 Dec 1998	-17.8°C16 Dec 1958	92 mm18 Dec 2023	237 mm1945 · driest 10 mm in 1988	71

Typical days per month at LEWES, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	18	3	<1
February	<1	<1	15	3	1
March	1	<1	8	4	<1
April	5	<1	<1	3	0
May	13	4	0	3	0
June	23	12	0	3	0
July	28	19	0	3	0
August	29	15	0	4	0
September	19	5	0	3	0
October	5	<1	<1	3	0
November	<1	0	4	3	0
December	0	0	13	4	<1

How often, not how much — every day in LEWES’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%	29%	10%	34%	4.0–10.6°C
February	3%	29%	11%	33%	4.8–11.4°C
March	10%	29%	12%	35%	9.5–14.8°C
April	27%	28%	10%	32%	15.6–20.1°C
May	53%	29%	10%	35%	20.5–24.6°C
June	73%	25%	10%	26%	25.4–29.3°C
July	73%	27%	11%	31%	27.9–31.7°C
August	75%	25%	10%	24%	27.6–30.6°C
September	74%	22%	9%	21%	24.3–27.2°C
October	43%	21%	9%	20%	18.3–21.9°C
November	14%	25%	11%	24%	12.7–17.2°C
December	3%	27%	12%	32%	5.6–12.5°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.

1946Each stripe is one year’s mean temperature against the 64-year average. Warmest: 1997. Coolest: 1958.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4143354
NOAA station: USC00075320 · LEWES
Station distance: 1.9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 19 usable years
Daylight: Calculated from latitude 38.77°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 11 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 LEWES is what differs

Nassau→Long Neck→Rehoboth Beach→Dewey Beach→Slaughter Beach→Henlopen Acres→

Or put two places side by side: Lewes vs Nassau

Best time to visitLewes.

May

August

October

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Lewes.

The whole year,
without the guesswork.

Nearby, measured,
and named.