United States · 1991–2020

Best time to visit
Chesapeake Beach.

September leads for comfortable weather in Chesapeake Beach: typically 24.9°C by day, 14.9°C at night, with 124 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high24.9°C

Typical low14.9°C

Rain in September124 mm

Comfort

September

September · May · June

80climate match

Beach

July

July · August · June

73climate match

Outdoors

April

April · October · May

78climate match

The weakest month is January, scoring 5 against September’s 80 — days reach only 6.9°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

56.9° / -3.4°

Feb

98.7° / -2.6°

Mar

2513.3° / 1°

Apr

5819.6° / 6.4°

May

7523.2° / 11.6°

Jun

7027.5° / 16.7°

Jul

5729.6° / 19.4°

Aug

6228.6° / 18.5°

Sep

8024.9° / 14.9°

Oct

5819° / 8.2°

Nov

3514.1° / 2.5°

Dec

89° / -1.3°

Monthly climate evidence for Chesapeake Beach — 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	6.9°C	-3.4°C	84 mm	8.1	3.5°C	9 h 44	5	Strong coverage
February	8.7°C	-2.6°C	75 mm	7	2.6°C	10 h 41	9	Strong coverage
March	13.3°C	1°C	108 mm	8.3	4.3°C	11 h 50	25	Strong coverage
April	19.6°C	6.4°C	84 mm	8.4	8.6°C	13 h 09	58	Strong coverage
May	23.2°C	11.6°C	111 mm	9.1	14.1°C	14 h 15	75	Strong coverage
June	27.5°C	16.7°C	106 mm	9.1	20.2°C	14 h 51	70	Strong coverage
July	29.6°C	19.4°C	116 mm	8.8	24.7°C	14 h 37	57	Strong coverage
August	28.6°C	18.5°C	123 mm	7.7	25.7°C	13 h 40	62	Strong coverage
September	24.9°C	14.9°C	124 mm	7.5	23.4°C	12 h 23	80	Strong coverage
October	19°C	8.2°C	107 mm	6.6	18.5°C	11 h 07	58	Strong coverage
November	14.1°C	2.5°C	85 mm	6.8	12.4°C	10 h 01	35	Strong coverage
December	9°C	-1.3°C	101 mm	7.4	7.3°C	9 h 28	8	Strong coverage

What has changed

Chesapeake Beach runs -0.4°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

+1.1

Feb

+0.8

Mar

-0.7

Apr

-0.3

May

-1.5

Jun

-1.3

Jul

-1.1

Aug

—

Sep

-1.0

Oct

-0.3

Nov

-0.8

Dec

+0.5

September daytime highs, 2011–2025. Last recorded: 24.1°C.

Records at MECHANICSVILLE 5 NE, 1974–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	27.2°C30 Jan 2002	-21.7°C17 Jan 1982	79 mm28 Jan 1998	211 mm1978 · driest 11 mm in 1981	52
February	27.2°C24 Feb 1985	-22.8°C5 Feb 1996	88 mm11 Feb 2018	189 mm1998 · driest 9 mm in 2009	52
March	32.8°C30 Mar 1998	-15.0°C4 Mar 2014	89 mm4 Mar 1993	276 mm1984 · driest 2 mm in 2006	52
April	34.4°C22 Apr 1985	-6.1°C7 Apr 1982	67 mm12 Apr 2025	206 mm1983 · driest 11 mm in 1985	51
May	34.4°C20 May 1996	-1.1°C4 May 1986	120 mm12 May 2008	294 mm2018 · driest 16 mm in 1999	50
June	37.2°C30 Jun 2012	4.4°C4 Jun 1988	62 mm10 Jun 1990	243 mm2015 · driest 22 mm in 1988	51
July	39.4°C16 Jul 1980	7.2°C6 Jul 1979	176 mm7 Jul 2020	354 mm2020 · driest 17 mm in 1993	51
August	38.3°C19 Aug 1983	5.0°C30 Aug 1986	220 mm28 Aug 2011	497 mm2020 · driest 12 mm in 1995	49
September	37.8°C2 Sep 1980	1.7°C29 Sep 1981	206 mm2 Sep 2006	344 mm2006 · driest 3 mm in 2005	51
October	32.2°C3 Oct 2019	-6.7°C24 Oct 2003	140 mm12 Oct 2018	243 mm1995 · driest 1 mm in 2000	51
November	27.8°C15 Nov 1993	-10.0°C24 Nov 1989	95 mm12 Nov 2020	185 mm1997 · driest 12 mm in 2016	52
December	26.7°C6 Dec 1998	-17.8°C25 Dec 1989	85 mm18 Dec 2023	255 mm2009 · driest 7 mm in 1980	52

Typical days per month at MECHANICSVILLE 5 NE, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	24	3	2
February	<1	0	21	3	2
March	2	<1	15	4	1
April	6	2	4	3	<1
May	13	3	0	4	0
June	24	9	0	4	0
July	29	15	0	3	0
August	28	11	0	3	0
September	16	3	0	4	0
October	3	<1	1	3	0
November	<1	0	12	3	0
December	<1	0	21	4	<1

How often, not how much — every day in MECHANICSVILLE 5 NE’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%	10%	27%	3.6–10.0°C
February	5%	27%	10%	31%	4.7–12.3°C
March	15%	28%	12%	31%	10.3–16.7°C
April	38%	28%	11%	31%	17.9–21.8°C
May	59%	31%	13%	36%	21.5–25.6°C
June	70%	28%	12%	32%	26.3–29.3°C
July	71%	28%	11%	30%	28.5–31.7°C
August	75%	26%	11%	26%	27.0–30.9°C
September	71%	24%	11%	24%	23.6–26.9°C
October	39%	20%	9%	20%	17.5–21.1°C
November	15%	23%	8%	22%	11.7–17.1°C
December	3%	24%	11%	22%	6.2–12.3°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.

1975Each stripe is one year’s mean temperature against the 47-year average. Warmest: 1998. Coolest: 2014.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4351184
NOAA station: USC00185865 · MECHANICSVILLE 5 NE
Station distance: 27.2 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 38.69°, 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 MECHANICSVILLE 5 NE is what differs

St. Charles→La Plata→Golden Beach→Huntingtown Town Center→Huntingtown→Prince Frederick→

Or put two places side by side: Chesapeake Beach vs St. Charles

Best time to visitChesapeake Beach.