United States · 1991–2020

Best time to visit
Columbia.

September leads for comfortable weather in Columbia: typically 26.9°C by day, 13°C at night, with 100 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high26.9°C

Typical low13°C

Rain in September100 mm

Comfort

September

September · May · October

74climate match

Beach

August

August · July · June

70climate match

Outdoors

October

October · April · May

79climate match

The weakest month is January, scoring 5 against September’s 74 — days reach only 7.1°C, 17° below the 24°C the score treats as ideal, and nights drop to -4.3°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

57.1° / -4.3°

Feb

59.6° / -2.9°

Mar

2014.3° / 0.4°

Apr

4920.1° / 5.1°

May

7024.6° / 11°

Jun

6428.7° / 15.7°

Jul

5430.3° / 18°

Aug

6429.9° / 17°

Sep

7426.9° / 13°

Oct

6521° / 6.3°

Nov

3114.5° / 0.7°

Dec

58.9° / -2.3°

Monthly climate evidence for Columbia — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	7.1°C	-4.3°C	120 mm	9.7	9 h 52	5	Strong coverage
February	9.6°C	-2.9°C	113 mm	8.4	10 h 46	5	Good coverage
March	14.3°C	0.4°C	139 mm	10.5	11 h 51	20	Strong coverage
April	20.1°C	5.1°C	133 mm	9.8	13 h 06	49	Strong coverage
May	24.6°C	11°C	139 mm	10.2	14 h 08	70	Strong coverage
June	28.7°C	15.7°C	129 mm	9.5	14 h 42	64	Strong coverage
July	30.3°C	18°C	135 mm	10	14 h 28	54	Strong coverage
August	29.9°C	17°C	101 mm	6.8	13 h 35	64	Strong coverage
September	26.9°C	13°C	100 mm	6.9	12 h 22	74	Strong coverage
October	21°C	6.3°C	80 mm	6.8	11 h 10	65	Strong coverage
November	14.5°C	0.7°C	91 mm	7.9	10 h 08	31	Strong coverage
December	8.9°C	-2.3°C	146 mm	10.5	9 h 37	5	Strong coverage

What has changed

Columbia 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

+0.8

Feb

+1.5

Mar

+0.7

Apr

+0.3

May

+0.2

Jun

-0.3

Jul

-0.4

Aug

-0.8

Sep

+0.3

Oct

+1.0

Nov

0.0

Dec

+1.4

September daytime highs, 2011–2025. Last recorded: 27.6°C.

Records at JAMESTOWN WWTP, 1971–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	24.4°C31 Jan 2002	-30.0°C19 Jan 1994	79 mm27 Jan 2009	241 mm1972 · driest 13 mm in 1994	53
February	26.7°C25 Feb 2017	-28.3°C18 Feb 2015	93 mm5 Feb 2004	303 mm2019 · driest 20 mm in 1996	52
March	31.7°C5 Mar 1983	-18.3°C6 Mar 2015	93 mm21 Mar 1976	339 mm1975 · driest 42 mm in 2022	52
April	32.2°C10 Apr 1995	-8.9°C6 Apr 2007	80 mm29 Apr 2014	270 mm2015 · driest 7 mm in 1997	53
May	32.8°C30 May 2006	-2.2°C9 May 2020	137 mm7 May 1984	297 mm2010 · driest 35 mm in 2023	53
June	39.4°C30 Jun 2012	4.4°C1 Jun 2003	89 mm6 Jun 2003	284 mm1976 · driest 21 mm in 2008	53
July	39.4°C17 Jul 1980	8.9°C6 Jul 2006	93 mm6 Jul 2016	293 mm2016 · driest 9 mm in 1993	50
August	38.3°C11 Aug 1980	6.1°C1 Aug 2009	125 mm19 Aug 1975	271 mm2006 · driest 0 mm in 1993	52
September	36.1°C3 Sep 2011	1.1°C25 Sep 2001	208 mm2 Sep 1982	294 mm1982 · driest 4 mm in 2019	50
October	34.4°C3 Oct 2019	-5.6°C27 Oct 2001	74 mm7 Oct 2013	223 mm1984 · driest 3 mm in 2024	49
November	30.0°C1 Nov 1987	-13.9°C30 Nov 1976	97 mm9 Nov 1986	284 mm1986 · driest 9 mm in 2009	52
December	26.1°C4 Dec 1982	-25.6°C22 Dec 1989	116 mm8 Dec 1978	448 mm1978 · driest 0 mm in 1994	50

Typical days per month at JAMESTOWN WWTP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	19	4	1
February	<1	0	17	4	2
March	2	0	13	5	<1
April	7	<1	5	5	0
May	17	3	<1	4	0
June	26	12	0	4	0
July	30	19	0	4	0
August	29	17	0	3	0
September	21	8	0	3	0
October	8	<1	3	3	0
November	1	0	13	3	0
December	0	0	18	4	<1

How often, not how much — every day in JAMESTOWN WWTP’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	<1%	31%	14%	41%	3.1–9.8°C
February	4%	32%	14%	42%	5.1–13.0°C
March	17%	34%	15%	46%	11.3–17.3°C
April	37%	33%	14%	44%	17.7–22.7°C
May	56%	34%	13%	43%	22.2–26.5°C
June	69%	31%	14%	35%	26.7–30.6°C
July	68%	32%	13%	40%	28.9–32.2°C
August	75%	25%	11%	31%	28.0–32.0°C
September	71%	25%	11%	25%	24.7–28.9°C
October	48%	23%	10%	23%	18.6–22.8°C
November	15%	29%	12%	38%	11.3–16.9°C
December	2%	32%	14%	43%	5.8–12.1°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.

1972Each stripe is one year’s mean temperature against the 37-year average. Warmest: 1986. Coolest: 2014.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4288366
NOAA station: USC00154208 · JAMESTOWN WWTP
Station distance: 24.3 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 24 usable years
Daylight: Calculated from latitude 37.10°, 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 JAMESTOWN WWTP is what differs

Russell Springs→Jamestown→Salem→Aaron→Amandaville→Bakerton→

Or put two places side by side: Columbia vs Russell Springs

Best time to visitColumbia.