United States · 1991–2020

Best time to visit
Chesapeake.

September leads for comfortable weather in Chesapeake: typically 26.6°C by day, 15°C at night, with 85 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high26.6°C

Typical low15°C

Rain in September85 mm

Comfort

September

September · May · June

80climate match

Beach

August

August · July · June

75climate match

Outdoors

October

October · April · May

82climate match

The weakest month is January, scoring 5 against September’s 80 — days reach only 6.7°C, 17° 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

56.7° / -3.3°

Feb

78.7° / -2.2°

Mar

2313.7° / 1.2°

Apr

5720.5° / 6.1°

May

7324.4° / 11.4°

Jun

6628.2° / 16.5°

Jul

5130° / 18.9°

Aug

6229.4° / 18.6°

Sep

8026.6° / 15°

Oct

6620.6° / 8.5°

Nov

3414.1° / 2.3°

Dec

68.8° / -0.9°

Monthly climate evidence for Chesapeake — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	6.7°C	-3.3°C	80 mm	10.4	9 h 46	5	Strong coverage
February	8.7°C	-2.2°C	78 mm	9.4	10 h 43	7	Strong coverage
March	13.7°C	1.2°C	107 mm	11.7	11 h 50	23	Strong coverage
April	20.5°C	6.1°C	96 mm	11.1	13 h 08	57	Strong coverage
May	24.4°C	11.4°C	119 mm	11.5	14 h 13	73	Strong coverage
June	28.2°C	16.5°C	115 mm	10.4	14 h 48	66	Strong coverage
July	30°C	18.9°C	143 mm	10.3	14 h 35	51	Strong coverage
August	29.4°C	18.6°C	97 mm	8.5	13 h 39	62	Strong coverage
September	26.6°C	15°C	85 mm	7.6	12 h 23	80	Strong coverage
October	20.6°C	8.5°C	76 mm	8.4	11 h 08	66	Strong coverage
November	14.1°C	2.3°C	75 mm	8.7	10 h 03	34	Strong coverage
December	8.8°C	-0.9°C	94 mm	10.8	9 h 31	6	Strong coverage

What has changed

Chesapeake runs +0.7°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

+0.4

Feb

+1.7

Mar

+0.6

Apr

+0.9

May

+0.4

Jun

+0.3

Jul

+0.8

Aug

+0.2

Sep

+1.0

Oct

+0.8

Nov

-0.3

Dec

+1.6

September daytime highs, 2011–2025. Last recorded: 27.0°C.

Records at LONDON LOCKS, 1936–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	27.8°C26 Jan 1950	-26.7°C22 Jan 1985	42 mm2 Jan 2022	186 mm1950 · driest 8 mm in 2026	89
February	26.7°C16 Feb 1945	-22.8°C21 Feb 2015	57 mm17 Feb 2023	207 mm2025 · driest 18 mm in 1968	90
March	31.1°C31 Mar 1998	-18.3°C3 Mar 1980	50 mm7 Mar 1967	225 mm1993 · driest 27 mm in 1987	88
April	33.3°C27 Apr 1942	-7.8°C18 Apr 1951	75 mm12 Apr 2024	173 mm1980 · driest 17 mm in 1942	90
May	35.0°C30 May 1991	-2.2°C3 May 1961	64 mm6 May 1996	278 mm1996 · driest 14 mm in 2015	89
June	37.8°C30 Jun 2012	3.9°C1 Jun 1961	85 mm25 Jun 1984	234 mm1998 · driest 12 mm in 1966	90
July	38.3°C15 Jul 1954	6.1°C27 Jul 1962	84 mm22 Jul 2026	288 mm2001 · driest 32 mm in 1987	90
August	45.6°C3 Aug 1988	4.4°C25 Aug 1984	84 mm2 Aug 1945	199 mm1968 · driest 15 mm in 1957	90
September	37.8°C4 Sep 1953	2.2°C29 Sep 1942	79 mm7 Sep 1996	205 mm1989 · driest 11 mm in 1959	89
October	34.4°C2 Oct 2019	-6.1°C27 Oct 1962	71 mm28 Oct 1937	185 mm1937 · driest 3 mm in 1988	88
November	29.4°C6 Nov 1948	-15.6°C26 Nov 1950	102 mm28 Nov 1973	205 mm1973 · driest 19 mm in 1939	88
December	26.1°C10 Dec 1966	-21.7°C26 Dec 1983	59 mm9 Dec 1978	217 mm1978 · driest 11 mm in 1965	89

Typical days per month at LONDON LOCKS, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	22	3	<1
February	<1	0	19	3	<1
March	2	<1	14	4	<1
April	9	1	2	3	0
May	16	4	0	4	0
June	25	11	0	4	0
July	29	17	0	5	0
August	29	14	0	3	0
September	20	7	0	3	0
October	7	<1	<1	3	0
November	<1	0	11	3	<1
December	0	0	19	3	<1

How often, not how much — every day in LONDON LOCKS’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%	37%	9%	49%	2.7–10.6°C
February	3%	37%	10%	52%	4.4–11.7°C
March	15%	37%	12%	53%	10.0–17.3°C
April	35%	38%	11%	51%	17.0–22.5°C
May	53%	38%	13%	51%	22.0–26.8°C
June	64%	34%	12%	46%	26.1–30.0°C
July	66%	34%	16%	45%	28.3–31.8°C
August	71%	29%	12%	32%	27.5–31.0°C
September	70%	26%	10%	28%	24.3–28.9°C
October	45%	26%	8%	30%	17.8–22.9°C
November	14%	32%	9%	40%	11.3–16.8°C
December	2%	34%	9%	46%	4.7–12.2°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.

1937Each stripe is one year’s mean temperature against the 80-year average. Warmest: 1990. Coolest: 1961.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4801966
NOAA station: USC00465365 · LONDON LOCKS
Station distance: 14.9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 38.22°, mid-month, sunrise to sunset including refraction. Not a station measurement.
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 LONDON LOCKS is what differs

Montgomery→Belle→Cedar Grove→East Bank→Glasgow→Smithers→

Or put two places side by side: Chesapeake vs Montgomery

Best time to visitChesapeake.