United States · 1991–2020

Best time to visit
Charleston.

October leads for comfortable weather in Charleston: typically 23.9°C by day, 10.2°C at night, with 111 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortOctober

Typical high23.9°C

Typical low10.2°C

Rain in October111 mm

Comfort

October

October · April · May

77climate match

Beach

August

August · July · June

73climate match

Outdoors

October

October · April · March

70climate match

The weakest month is January, scoring 13 against October’s 77 — days reach only 10.2°C, 14° below the 24°C the score treats as ideal, and nights drop to -1.6°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

1310.2° / -1.6°

Feb

2813.1° / 0.3°

Mar

4417.9° / 4.4°

Apr

6923° / 9.2°

May

6926.7° / 14.6°

Jun

5631° / 19.1°

Jul

4633.7° / 21.2°

Aug

4933.5° / 20.5°

Sep

6529.6° / 16.6°

Oct

7723.9° / 10.2°

Nov

4216.9° / 4.2°

Dec

1811.4° / -0.1°

Monthly climate evidence for Charleston — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	10.2°C	-1.6°C	94 mm	6.6	10 h 01	13	Strong coverage
February	13.1°C	0.3°C	83 mm	6.4	10 h 51	28	Strong coverage
March	17.9°C	4.4°C	120 mm	8.5	11 h 52	44	Strong coverage
April	23°C	9.2°C	128 mm	7.9	13 h 02	69	Strong coverage
May	26.7°C	14.6°C	148 mm	8.6	14 h	69	Strong coverage
June	31°C	19.1°C	108 mm	7.2	14 h 31	56	Strong coverage
July	33.7°C	21.2°C	90 mm	6.9	14 h 19	46	Strong coverage
August	33.5°C	20.5°C	87 mm	5.8	13 h 29	49	Strong coverage
September	29.6°C	16.6°C	112 mm	6.2	12 h 21	65	Strong coverage
October	23.9°C	10.2°C	111 mm	6.8	11 h 14	77	Strong coverage
November	16.9°C	4.2°C	121 mm	6.9	10 h 15	42	Strong coverage
December	11.4°C	-0.1°C	111 mm	6.5	9 h 47	18	Strong coverage

Records at BOONEVILLE 3 SSE, 1978–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	25.6°C30 Jan 2011	-20.6°C20 Jan 1985	104 mm5 Jan 1998	206 mm1998 · driest 5 mm in 2003	47
February	29.4°C23 Feb 1982	-21.1°C16 Feb 2021	88 mm21 Feb 2018	283 mm2018 · driest 8 mm in 1980	45
March	32.2°C12 Mar 1989	-13.3°C4 Mar 2002	140 mm18 Mar 2008	434 mm2008 · driest 8 mm in 2025	47
April	35.6°C19 Apr 1987	-5.6°C8 Apr 2007	124 mm25 Apr 2011	349 mm2011 · driest 10 mm in 1987	48
May	36.7°C29 May 1991	1.1°C5 May 2013	138 mm23 May 2020	405 mm2015 · driest 35 mm in 2012	48
June	40.6°C29 Jun 2012	8.3°C16 Jun 1985	92 mm23 Jun 2019	232 mm2019 · driest 19 mm in 2011	47
July	45.0°C30 Jul 1986	10.6°C16 Jul 1990	78 mm13 Jul 1989	230 mm1979 · driest 0 mm in 1986	47
August	44.4°C4 Aug 2011	5.0°C29 Aug 1986	122 mm9 Aug 2008	282 mm2020 · driest 0 mm in 2001	47
September	42.2°C3 Sep 2000	0.6°C24 Sep 1989	107 mm2 Sep 2008	253 mm2009 · driest 5 mm in 2017	47
October	35.6°C16 Oct 2015	-5.0°C30 Oct 1993	138 mm18 Oct 1981	490 mm1984 · driest 8 mm in 2005	46
November	31.7°C17 Nov 2016	-11.1°C27 Nov 1993	126 mm5 Nov 2024	350 mm1996 · driest 19 mm in 1989	47
December	26.7°C27 Dec 2025	-19.4°C25 Dec 1983	201 mm2 Dec 1982	324 mm1982 · driest 5 mm in 2025	47

Typical days per month at BOONEVILLE 3 SSE, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	20	3	<1
February	<1	0	14	3	<1
March	4	<1	7	4	<1
April	12	2	1	4	0
May	22	8	0	4	0
June	29	21	0	3	0
July	30	27	0	3	0
August	30	26	0	3	0
September	26	16	0	3	0
October	15	4	1	3	0
November	2	<1	8	3	0
December	<1	0	17	4	<1

How often, not how much — every day in BOONEVILLE 3 SSE’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	7%	21%	9%	19%	7.7–13.1°C
February	17%	24%	11%	26%	9.6–17.0°C
March	37%	27%	13%	29%	15.0–21.4°C
April	60%	26%	13%	28%	20.9–25.4°C
May	67%	30%	15%	35%	25.0–29.3°C
June	77%	23%	11%	23%	29.5–33.4°C
July	79%	21%	10%	20%	31.7–37.3°C
August	82%	19%	8%	17%	31.1–36.4°C
September	79%	20%	10%	18%	27.2–32.5°C
October	68%	21%	10%	22%	22.2–26.0°C
November	32%	22%	11%	22%	14.2–19.6°C
December	9%	21%	11%	19%	9.1–14.2°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.

1979Each stripe is one year’s mean temperature against the 44-year average. Warmest: 1998. Coolest: 2014.2023

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4105377
NOAA station: USC00030832 · BOONEVILLE 3 SSE
Station distance: 24.8 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 35.30°, 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 BOONEVILLE 3 SSE is what differs

Booneville→Magazine→Branch→Barber→Brownsville→Carolan→

Or put two places side by side: Charleston vs Booneville

Best time to visitCharleston.

October

August

October

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Charleston.

The whole year,
without the guesswork.

Nearby, measured,
and named.