United States · 1991–2020

Best time to visit
Koolauloa.

January leads for comfortable weather in Koolauloa: typically 25.6°C by day, 18.7°C at night, with 72 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJanuary

Typical high25.6°C

Typical low18.7°C

Rain in January72 mm

Comfort

January

January · February · April

78climate match

Beach

June

June · May · August

86climate match

Outdoors

January

January · April · February

55climate match

The weakest month is October, scoring 60 against January’s 78 — days average 28.5°C, 5° above the 24°C the score treats as ideal, and nights stay at 22.5°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

7825.6° / 18.7°

Feb

7725.2° / 18.8°

Mar

7225.4° / 19.3°

Apr

7726° / 20.4°

May

7426.7° / 20.9°

Jun

6927.6° / 22.3°

Jul

6428.1° / 22.8°

Aug

6328.5° / 23.2°

Sep

6228.8° / 23.1°

Oct

6028.5° / 22.5°

Nov

6127.1° / 21.4°

Dec

6826.1° / 20.1°

Monthly climate evidence for Koolauloa — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 6 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	25.6°C	18.7°C	72 mm	8.2	24.1°C	10 h 57	78	Strong coverage
February	25.2°C	18.8°C	84 mm	8.5	23.8°C	11 h 24	77	Strong coverage
March	25.4°C	19.3°C	98 mm	10.1	23.8°C	11 h 58	72	Strong coverage
April	26°C	20.4°C	52 mm	8	24.2°C	12 h 37	77	Strong coverage
May	26.7°C	20.9°C	52 mm	7.6	24.8°C	13 h 09	74	Strong coverage
June	27.6°C	22.3°C	39 mm	8.6	25.5°C	13 h 26	69	Strong coverage
July	28.1°C	22.8°C	51 mm	9.8	25.8°C	13 h 20	64	Strong coverage
August	28.5°C	23.2°C	51 mm	8.7	26.3°C	12 h 52	63	Strong coverage
September	28.8°C	23.1°C	56 mm	8.8	26.6°C	12 h 15	62	Strong coverage
October	28.5°C	22.5°C	79 mm	9.2	26.5°C	11 h 37	60	Strong coverage
November	27.1°C	21.4°C	103 mm	11.3	25.9°C	11 h 05	61	Strong coverage
December	26.1°C	20.1°C	100 mm	10.9	24.9°C	10 h 49	68	Strong coverage

Records at KII-KAHUKU 911, 1980–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	32.8°C3 Jan 2003	10.0°C2 Jan 2015	182 mm6 Jan 1982	558 mm1987 · driest 5 mm in 1995	45
February	32.2°C15 Feb 2004	10.0°C1 Feb 1985	126 mm19 Feb 2018	515 mm1987 · driest 5 mm in 2000	46
March	31.1°C31 Mar 2003	12.8°C16 Mar 1993	133 mm20 Mar 2026	542 mm2006 · driest 9 mm in 1998	45
April	32.2°C17 Apr 2017	13.9°C2 Apr 2012	87 mm11 Apr 2026	165 mm2023 · driest 5 mm in 1996	45
May	31.1°C2 May 2017	12.8°C8 May 1988	150 mm7 May 1982	287 mm2024 · driest 9 mm in 2006	46
June	31.7°C28 Jun 2004	15.6°C29 Jun 1988	48 mm26 Jun 2019	127 mm1982 · driest 6 mm in 2002	46
July	32.8°C30 Jul 1990	14.4°C11 Jul 1988	66 mm25 Jul 1988	153 mm1993 · driest 3 mm in 2018	47
August	33.3°C9 Aug 2004	17.2°C4 Aug 2010	86 mm24 Aug 2016	171 mm2016 · driest 3 mm in 1997	44
September	34.4°C8 Sep 2004	15.0°C27 Sep 2011	69 mm23 Sep 1993	152 mm2018 · driest 10 mm in 2020	43
October	35.0°C3 Oct 2003	15.6°C27 Oct 1993	218 mm17 Oct 1991	301 mm1991 · driest 4 mm in 1998	43
November	32.8°C6 Nov 2023	13.3°C27 Nov 1990	255 mm13 Nov 1986	1142 mm1986 · driest 14 mm in 2021	43
December	32.8°C20 Dec 2002	10.6°C11 Dec 2008	177 mm11 Dec 2008	478 mm2008 · driest 0 mm in 2005	45

Typical days per month at KII-KAHUKU 911, 1991–2020
Month	Days 25°C+	Days 30°C+	Heavy rain (10 mm+)
January	21	<1	2
February	16	<1	2
March	20	<1	2
April	24	<1	1
May	27	1	1
June	28	2	<1
July	29	2	1
August	29	5	<1
September	29	5	1
October	30	4	2
November	28	3	3
December	24	2	2

How often, not how much — every day in KII-KAHUKU 911’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	70%	30%	7%	37%	24.6–26.8°C
February	65%	36%	9%	45%	23.9–26.3°C
March	66%	34%	8%	43%	24.5–27.0°C
April	68%	32%	5%	39%	24.9–27.0°C
May	70%	29%	4%	31%	25.6–27.7°C
June	69%	31%	2%	39%	26.4–28.8°C
July	65%	36%	3%	45%	27.2–29.0°C
August	69%	31%	3%	37%	27.7–29.6°C
September	68%	32%	4%	41%	27.9–29.7°C
October	68%	32%	6%	41%	27.7–29.6°C
November	60%	40%	10%	50%	26.3–28.5°C
December	64%	36%	8%	47%	25.0–27.2°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.

1982Each stripe is one year’s mean temperature against the 29-year average. Warmest: 2004. Coolest: 2011.2024

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 13100438
NOAA station: USC00514500 · KII-KAHUKU 911
Station distance: 8.4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 27 usable years
Daylight: Calculated from latitude 21.61°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 6 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 KII-KAHUKU 911 is what differs

Lā‘ie→Hau‘ula→Hauʻula-Punaluʻu→Kahuku-Kawela→Kahuku→Kawela Bay→

Or put two places side by side: Koolauloa vs Lā‘ie

Best time to visitKoolauloa.

January

June

January

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Koolauloa.

The whole year,
without the guesswork.

Nearby, measured,
and named.