United States · 1991–2020

Best time to visit
Sumter.

October leads for comfortable weather in Sumter: typically 23.9°C by day, 10.7°C at night, with 99 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortOctober

Typical high23.9°C

Typical low10.7°C

Rain in October99 mm

Comfort

October

October · April · May

81climate match

Beach

September

September · August · June

72climate match

Outdoors

November

November · March · April

76climate match

The weakest month is January, scoring 25 against October’s 81 — days reach only 13.3°C, 11° below the 24°C the score treats as ideal, and nights drop to 0.5°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

2513.3° / 0.5°

Feb

3415° / 1.6°

Mar

5519.5° / 4.9°

Apr

7924.1° / 9.6°

May

7427.7° / 14.5°

Jun

5131° / 19°

Jul

3932.7° / 21.1°

Aug

4731.6° / 20.3°

Sep

6528.9° / 17.4°

Oct

8123.9° / 10.7°

Nov

5518.6° / 4.6°

Dec

3214.6° / 1.8°

Monthly climate evidence for Sumter — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	13.3°C	0.5°C	96 mm	8.5	10 h 07	25	Strong coverage
February	15°C	1.6°C	90 mm	7.8	10 h 55	34	Strong coverage
March	19.5°C	4.9°C	90 mm	7.6	11 h 52	55	Strong coverage
April	24.1°C	9.6°C	86 mm	6.6	12 h 59	79	Strong coverage
May	27.7°C	14.5°C	96 mm	7.6	13 h 54	74	Strong coverage
June	31°C	19°C	128 mm	9.4	14 h 24	51	Strong coverage
July	32.7°C	21.1°C	143 mm	9.7	14 h 12	39	Strong coverage
August	31.6°C	20.3°C	126 mm	9.2	13 h 25	47	Strong coverage
September	28.9°C	17.4°C	111 mm	7.1	12 h 21	65	Strong coverage
October	23.9°C	10.7°C	99 mm	5.8	11 h 16	81	Strong coverage
November	18.6°C	4.6°C	76 mm	6.1	10 h 21	55	Strong coverage
December	14.6°C	1.8°C	97 mm	8.1	9 h 54	32	Strong coverage

What has changed

Sumter runs -0.5°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

-0.1

Feb

+0.3

Mar

-0.4

Apr

-0.6

May

-1.0

Jun

-0.4

Jul

-0.4

Aug

-1.0

Sep

-0.5

Oct

-0.7

Nov

-1.7

Dec

+0.4

October daytime highs, 2011–2025. Last recorded: 22.9°C.

Records at SUMTER, 1901–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	28.3°C28 Jan 1944	-16.7°C21 Jan 1985	67 mm10 Jan 2024	210 mm1993 · driest 15 mm in 1902	100
February	30.0°C17 Feb 1945	-15.6°C12 Feb 1973	79 mm26 Feb 1939	207 mm1939 · driest 11 mm in 1947	101
March	36.1°C21 Mar 1935	-11.7°C2 Mar 1980	107 mm17 Mar 2022	297 mm1971 · driest 7 mm in 2007	98
April	34.4°C3 Apr 1946	-3.9°C1 Apr 1964	82 mm16 Apr 1958	259 mm1961 · driest 1 mm in 2026	100
May	40.0°C25 May 1903	2.2°C19 May 1997	91 mm20 May 1969	255 mm2020 · driest 5 mm in 1936	101
June	39.4°C22 Jun 1990	6.1°C1 Jun 1930	177 mm18 Jun 1954	364 mm1903 · driest 21 mm in 1944	100
July	40.6°C5 Jul 1902	11.1°C5 Jul 1992	140 mm24 Jul 1994	397 mm2013 · driest 27 mm in 1980	101
August	40.6°C1 Aug 1980	10.0°C18 Aug 1979	142 mm5 Aug 1946	327 mm1961 · driest 9 mm in 1904	99
September	38.9°C6 Sep 1954	3.3°C30 Sep 1967	221 mm17 Sep 1945	458 mm1945 · driest 0 mm in 2005	99
October	37.8°C5 Oct 1954	-4.4°C22 Oct 1974	271 mm4 Oct 2015	626 mm2015 · driest 0 mm in 2000	99
November	32.2°C3 Nov 1929	-8.9°C30 Nov 1959	74 mm6 Nov 1963	221 mm1985 · driest 3 mm in 2025	99
December	28.9°C20 Dec 1931	-13.3°C14 Dec 1962	98 mm28 Dec 1992	235 mm1941 · driest 2 mm in 1933	97

Typical days per month at SUMTER, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	<1	0	16	3
February	1	0	12	3
March	7	<1	7	3
April	15	3	<1	3
May	25	10	0	3
June	28	21	0	4
July	30	27	0	4
August	30	24	0	4
September	25	14	0	3
October	14	2	<1	3
November	4	0	7	3
December	1	0	14	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 (83). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in SUMTER’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	14%	27%	10%	27%	10.5–17.5°C
February	22%	27%	11%	31%	12.7–19.3°C
March	43%	26%	11%	26%	17.2–23.1°C
April	70%	21%	9%	19%	22.5–26.8°C
May	74%	25%	9%	25%	26.7–30.4°C
June	70%	30%	13%	35%	29.6–33.6°C
July	67%	33%	14%	40%	31.3–34.5°C
August	70%	30%	14%	34%	30.5–33.9°C
September	77%	22%	10%	21%	27.8–31.5°C
October	75%	16%	7%	13%	22.6–26.4°C
November	43%	19%	8%	17%	16.9–22.2°C
December	17%	26%	10%	29%	12.1–17.8°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.

1930Each stripe is one year’s mean temperature against the 81-year average. Warmest: 1945. Coolest: 2014.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4597948
NOAA station: USC00388440 · SUMTER
Station distance: 1.7 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 28 usable years
Daylight: Calculated from latitude 33.92°, 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 SUMTER is what differs

Dalzell→Lakewood→South Sumter→East Sumter→Millwood→Mayesville→

Or put two places side by side: Sumter vs Dalzell

Best time to visitSumter.

October

September

November

The whole year,without the guesswork.

Sumter runs -0.5°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Sumter.

The whole year,
without the guesswork.

Sumter runs -0.5°C
on the 1961–1990 baseline.

Nearby, measured,
and named.