United States · 1991–2020

Best time to visit
Koloa.

January leads for comfortable weather in Koloa: typically 27.7°C by day, 16.6°C at night, with 88 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJanuary

Typical high27.7°C

Typical low16.6°C

Rain in January88 mm

Comfort

January

January · February · April

72climate match

Beach

May

May · June · July

82climate match

Outdoors

January

January · February · April

49climate match

The weakest month is August, scoring 48 against January’s 72 — days average 30.4°C, 6° above the 24°C the score treats as ideal, and nights stay at 22.2°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

7227.7° / 16.6°

Feb

6827.3° / 17.3°

Mar

5727.3° / 17.8°

Apr

6528.1° / 18.8°

May

6428.8° / 19.8°

Jun

5529.6° / 21.2°

Jul

5130° / 22°

Aug

4830.4° / 22.2°

Sep

5030.7° / 22.3°

Oct

5030.3° / 21.2°

Nov

5229.2° / 20°

Dec

5728.1° / 18.5°

Monthly climate evidence for Koloa — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 10 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	27.7°C	16.6°C	88 mm	8.7	24.2°C	10 h 56	72	Strong coverage
February	27.3°C	17.3°C	113 mm	10	23.9°C	11 h 24	68	Strong coverage
March	27.3°C	17.8°C	168 mm	12	23.9°C	11 h 58	57	Strong coverage
April	28.1°C	18.8°C	82 mm	12.5	24.5°C	12 h 38	65	Strong coverage
May	28.8°C	19.8°C	68 mm	10.7	25.1°C	13 h 10	64	Strong coverage
June	29.6°C	21.2°C	66 mm	14.7	25.7°C	13 h 28	55	Strong coverage
July	30°C	22°C	73 mm	15.5	26.1°C	13 h 21	51	Strong coverage
August	30.4°C	22.2°C	87 mm	14.5	26.5°C	12 h 53	48	Strong coverage
September	30.7°C	22.3°C	75 mm	13	26.9°C	12 h 15	50	Good coverage
October	30.3°C	21.2°C	97 mm	13	26.8°C	11 h 36	50	Good coverage
November	29.2°C	20°C	120 mm	13.9	26.0°C	11 h 04	52	Strong coverage
December	28.1°C	18.5°C	136 mm	12.5	25.1°C	10 h 48	57	Good coverage

Records at MAHAULEPU 941.1, 1980–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	35.0°C23 Jan 2020	4.4°C9 Jan 1995	213 mm3 Jan 2022	293 mm1982 · driest 1 mm in 2001	43
February	34.4°C3 Feb 2022	4.4°C14 Feb 1995	188 mm27 Feb 2012	293 mm2023 · driest 1 mm in 2000	42
March	34.4°C30 Mar 2018	5.6°C7 Mar 1996	180 mm13 Mar 2026	658 mm2006 · driest 4 mm in 1993	42
April	35.0°C22 Apr 2020	11.1°C29 Apr 1998	104 mm10 Apr 2026	178 mm2024 · driest 15 mm in 1992	43
May	36.1°C26 May 2009	10.0°C1 May 1995	70 mm8 May 2002	127 mm2023 · driest 5 mm in 1995	42
June	35.6°C20 Jun 2018	12.8°C3 Jun 1994	82 mm28 Jun 2019	150 mm2019 · driest 10 mm in 2009	44
July	35.6°C8 Jul 2019	12.8°C2 Jul 2002	47 mm6 Jul 2020	170 mm2020 · driest 17 mm in 1990	44
August	36.1°C16 Aug 2019	11.7°C22 Aug 2002	128 mm29 Aug 2018	282 mm2018 · driest 9 mm in 1996	41
September	35.6°C19 Sep 2019	12.2°C4 Sep 2002	66 mm25 Sep 2018	166 mm2018 · driest 11 mm in 2002	38
October	36.1°C6 Oct 2009	11.1°C31 Oct 1995	129 mm29 Oct 1982	223 mm1982 · driest 9 mm in 2006	41
November	35.0°C6 Nov 2019	11.1°C30 Nov 1995	74 mm11 Nov 2013	194 mm2020 · driest 7 mm in 1983	42
December	35.0°C7 Dec 2020	6.1°C27 Dec 1993	143 mm3 Dec 1984	281 mm2008 · driest 2 mm in 2005	41

Typical days per month at MAHAULEPU 941.1, 1991–2020
Month	Days 25°C+	Days 30°C+	Heavy rain (10 mm+)
January	19	4	2
February	17	3	2
March	19	3	2
April	20	4	1
May	21	6	1
June	21	10	<1
July	21	12	1
August	22	17	1
September	20	17	<1
October	22	16	2
November	19	7	2
December	19	5	2

How often, not how much — every day in MAHAULEPU 941.1’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	67%	30%	10%	25%	26.2–29.2°C
February	62%	36%	10%	22%	25.4–28.7°C
March	59%	41%	12%	37%	25.5–28.8°C
April	52%	45%	11%	41%	26.1–29.7°C
May	59%	39%	6%	25%	27.4–30.0°C
June	53%	44%	4%	41%	28.1–30.9°C
July	46%	53%	6%	59%	28.8–31.2°C
August	54%	49%	7%	56%	29.2–31.9°C
September	54%	42%	5%	36%	29.5–32.2°C
October	56%	44%	8%	45%	28.9–32.0°C
November	54%	44%	12%	36%	27.9–30.3°C
December	54%	42%	12%	32%	26.3–30.1°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.

1982Each stripe is one year’s mean temperature against the 24-year average. Warmest: 2025. Coolest: 1998.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5849616
NOAA station: USC00515710 · MAHAULEPU 941.1
Station distance: 4.7 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 23 usable years
Daylight: Calculated from latitude 21.90°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 10 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 MAHAULEPU 941.1 is what differs

Omao-Kukuiula→Koloa-Poipu→Lawai→‘Ōma‘o→Po‘ipū→Kīpū→

Or put two places side by side: Koloa vs Omao-Kukuiula

Best time to visitKoloa.

January

May

January

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Koloa.

The whole year,
without the guesswork.

Nearby, measured,
and named.