United States · 1991–2020

Best time to visit
Summerville.

October leads for comfortable weather in Summerville: typically 25.6°C by day, 11.9°C at night, with 94 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortOctober

Typical high25.6°C

Typical low11.9°C

Rain in October94 mm

Comfort

October

October · April · May

77climate match

Beach

September

September · May · June

69climate match

Outdoors

November

November · March · April

79climate match

The weakest month is August, scoring 28 against October’s 77 — days average 32.4°C, 8° above the 24°C the score treats as ideal, and 204 mm of rain falls.

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

3415.5° / 1.8°

Feb

4517.5° / 3.1°

Mar

6121° / 6.3°

Apr

7624.7° / 9.8°

May

7028.7° / 15.4°

Jun

4231.5° / 19.7°

Jul

3033° / 21.9°

Aug

2832.4° / 21.7°

Sep

5830° / 18.4°

Oct

7725.6° / 11.9°

Nov

6120.3° / 5.7°

Dec

4116.8° / 3.1°

Monthly climate evidence for Summerville — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 44 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	15.5°C	1.8°C	103 mm	8.4	15.7°C	10 h 11	34	Good coverage
February	17.5°C	3.1°C	94 mm	7.1	15.1°C	10 h 57	45	Good coverage
March	21°C	6.3°C	102 mm	7.4	16.0°C	11 h 53	61	Strong coverage
April	24.7°C	9.8°C	94 mm	7.7	18.8°C	12 h 57	76	Good coverage
May	28.7°C	15.4°C	106 mm	7	23.0°C	13 h 50	70	Good coverage
June	31.5°C	19.7°C	167 mm	9.7	26.6°C	14 h 19	42	Good coverage
July	33°C	21.9°C	183 mm	10.4	28.4°C	14 h 08	30	Good coverage
August	32.4°C	21.7°C	204 mm	12.3	28.6°C	13 h 22	28	Good coverage
September	30°C	18.4°C	126 mm	7.3	27.2°C	12 h 20	58	Good coverage
October	25.6°C	11.9°C	94 mm	6.6	23.8°C	11 h 18	77	Good coverage
November	20.3°C	5.7°C	86 mm	6.2	19.7°C	10 h 25	61	Good coverage
December	16.8°C	3.1°C	97 mm	8.1	17.3°C	9 h 59	41	Good coverage

What has changed

Summerville runs +1.1°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

+2.0

Feb

+3.0

Mar

+1.3

Apr

+0.9

May

+0.7

Jun

+0.9

Jul

+0.8

Aug

+0.5

Sep

+0.8

Oct

+1.0

Nov

-0.2

Dec

+1.4

October daytime highs, 2011–2025. Last recorded: 23.7°C.

Records at SUMMERVILLE 4W, 1898–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	28.9°C15 Jan 1932	-15.0°C22 Jan 1985	91 mm14 Jan 1995	236 mm1991 · driest 0 mm in 2022	125
February	30.6°C17 Feb 1989	-20.6°C14 Feb 1899	101 mm13 Feb 2024	227 mm1998 · driest 2 mm in 1947	122
March	36.7°C23 Mar 1907	-7.2°C14 Mar 1998	113 mm13 Mar 1980	288 mm1980 · driest 8 mm in 2021	125
April	35.6°C27 Apr 1990	-2.8°C7 Apr 2007	99 mm16 Apr 1958	213 mm1961 · driest 0 mm in 1976	122
May	38.3°C26 May 1911	0.6°C2 May 1963	119 mm29 May 1965	232 mm1948 · driest 4 mm in 1941	123
June	40.0°C28 Jun 1952	7.2°C1 Jun 1930	224 mm27 Jun 1941	493 mm1973 · driest 22 mm in 1935	122
July	40.0°C3 Jul 1931	13.3°C2 Jul 1988	201 mm2 Jul 1966	445 mm1916 · driest 19 mm in 2006	121
August	41.1°C18 Aug 1954	12.8°C19 Aug 1979	260 mm12 Aug 1940	418 mm1940 · driest 42 mm in 1942	120
September	41.7°C21 Sep 1925	4.4°C30 Sep 1967	185 mm18 Sep 1928	410 mm1928 · driest 1 mm in 1990	116
October	37.2°C6 Oct 1954	-3.3°C29 Oct 1976	234 mm4 Oct 2015	472 mm2015 · driest 0 mm in 2024	120
November	32.2°C1 Nov 1961	-11.1°C25 Nov 1970	112 mm6 Nov 1963	207 mm1948 · driest 3 mm in 1931	121
December	30.6°C18 Dec 2008	-12.8°C26 Dec 1983	112 mm6 Dec 2016	216 mm1941 · driest 7 mm in 1933	120

Typical days per month at SUMMERVILLE 4W, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	1	0	12	3
February	2	0	8	3
March	8	<1	4	3
April	15	2	<1	3
May	24	11	0	3
June	25	20	0	5
July	28	26	0	5
August	27	23	0	5
September	26	17	0	4
October	17	3	<1	2
November	6	0	5	3
December	2	0	9	3

The best month has moved. On the 1961–1990 numbers the strongest month here was October (scoring 84); on 2011–2025 it is April (82). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in SUMMERVILLE 4W’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	20%	27%	10%	27%	12.1–18.9°C
February	26%	27%	12%	28%	13.8–20.1°C
March	47%	24%	11%	22%	17.7–23.5°C
April	70%	21%	10%	18%	23.1–26.7°C
May	75%	24%	11%	25%	27.0–30.1°C
June	67%	33%	15%	41%	29.4–33.1°C
July	61%	38%	18%	52%	30.8–34.3°C
August	63%	37%	18%	45%	30.6–33.4°C
September	74%	26%	12%	26%	27.8–31.5°C
October	74%	17%	7%	15%	23.3–26.9°C
November	48%	18%	7%	13%	18.2–22.5°C
December	22%	24%	9%	25%	13.3–19.2°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.

1899Each stripe is one year’s mean temperature against the 105-year average. Warmest: 2024. Coolest: 1901.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4597919
NOAA station: USC00388426 · SUMMERVILLE 4W
Station distance: 5.7 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 18 usable years
Daylight: Calculated from latitude 33.02°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 44 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 SUMMERVILLE 4W is what differs

Sangaree→Centerville→Lincolnville→Ashborough→Ashborough East→Ashley Forest→

Or put two places side by side: Summerville vs Sangaree

Best time to visitSummerville.