United States · 1991–2020

Best time to visit
Keolu Hills.

February leads for comfortable weather in Keolu Hills: typically 25.5°C by day, 18.4°C at night, with 107 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortFebruary

Typical high25.5°C

Typical low18.4°C

Rain in February107 mm

Comfort

February

February · January · May

73climate match

Beach

June

June · May · July

89climate match

Outdoors

February

February · May · June

49climate match

The weakest month is November, scoring 54 against February’s 73 — 142 mm of rain falls, and days average 27.5°C, 4° above the 24°C the score treats as ideal.

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

7025.7° / 18.2°

Feb

7325.5° / 18.4°

Mar

6525.8° / 19.3°

Apr

6926.6° / 20.5°

May

7027.5° / 21.2°

Jun

6728.5° / 22.6°

Jul

6029.1° / 23.2°

Aug

6029.5° / 23.5°

Sep

5529.7° / 23.2°

Oct

5528.9° / 22.5°

Nov

5427.5° / 21.4°

Dec

6026.2° / 19.9°

Monthly climate evidence for Keolu Hills — 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	25.7°C	18.2°C	121 mm	10.7	24.3°C	10 h 58	70	Strong coverage
February	25.5°C	18.4°C	107 mm	8.7	23.9°C	11 h 25	73	Strong coverage
March	25.8°C	19.3°C	137 mm	10.8	23.9°C	11 h 58	65	Strong coverage
April	26.6°C	20.5°C	86 mm	8.8	24.3°C	12 h 37	69	Strong coverage
May	27.5°C	21.2°C	61 mm	7.7	24.9°C	13 h 09	70	Strong coverage
June	28.5°C	22.6°C	30 mm	7.5	25.5°C	13 h 26	67	Strong coverage
July	29.1°C	23.2°C	47 mm	10.6	25.9°C	13 h 19	60	Strong coverage
August	29.5°C	23.5°C	46 mm	9	26.4°C	12 h 52	60	Strong coverage
September	29.7°C	23.2°C	68 mm	10.3	26.7°C	12 h 14	55	Strong coverage
October	28.9°C	22.5°C	98 mm	10.6	26.6°C	11 h 37	55	Strong coverage
November	27.5°C	21.4°C	142 mm	11.7	25.9°C	11 h 05	54	Strong coverage
December	26.2°C	19.9°C	144 mm	12.6	25.0°C	10 h 50	60	Strong coverage

What has changed

Keolu Hills 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

+0.4

Feb

0.0

Mar

+0.2

Apr

+0.8

May

+0.5

Jun

+0.6

Jul

+1.0

Aug

+0.5

Sep

+0.5

Oct

+0.6

Nov

+0.7

Dec

+0.2

February daytime highs, 2011–2021. Last recorded: 25.6°C.

Records at WAIMANALO EXP F 795.1, 1969–2021
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	29.4°C18 Jan 1970	11.1°C31 Jan 1998	283 mm1 Jan 1988	453 mm1982 · driest 12 mm in 2018	51
February	29.4°C26 Feb 1993	11.1°C9 Feb 1981	196 mm27 Feb 2004	367 mm2004 · driest 5 mm in 1998	50
March	29.4°C9 Mar 2007	12.2°C14 Mar 1993	194 mm20 Mar 1991	513 mm2006 · driest 4 mm in 2008	51
April	30.6°C28 Apr 1992	13.9°C1 Apr 2002	163 mm21 Apr 1970	316 mm1989 · driest 9 mm in 1990	51
May	30.6°C21 May 2007	13.3°C18 May 2006	211 mm7 May 1981	329 mm1981 · driest 4 mm in 2003	51
June	32.2°C24 Jun 2019	16.7°C2 Jun 1997	57 mm10 Jun 1982	127 mm1982 · driest 4 mm in 1985	50
July	32.2°C28 Jul 2003	18.9°C1 Jul 2006	77 mm25 Jul 2016	156 mm2016 · driest 12 mm in 1971	50
August	32.8°C28 Aug 2006	18.3°C4 Aug 1984	87 mm24 Aug 2015	250 mm2015 · driest 3 mm in 1984	50
September	33.3°C16 Sep 1972	15.0°C30 Sep 1992	121 mm13 Sep 2018	216 mm2018 · driest 8 mm in 1984	52
October	35.0°C14 Oct 1972	15.0°C2 Oct 2018	135 mm13 Oct 1992	280 mm1989 · driest 16 mm in 2016	51
November	31.7°C10 Nov 1991	13.9°C25 Nov 1990	171 mm4 Nov 2007	550 mm1970 · driest 8 mm in 2018	51
December	30.0°C24 Dec 1980	12.2°C23 Dec 1983	159 mm7 Dec 2021	411 mm1987 · driest 8 mm in 1974	52

Typical days per month at WAIMANALO EXP F 795.1, 1991–2020
Month	Days 25°C+	Days 30°C+	Heavy rain (10 mm+)
January	23	0	3
February	20	0	2
March	24	0	3
April	27	<1	2
May	30	<1	2
June	29	2	<1
July	30	7	<1
August	30	11	<1
September	29	13	1
October	30	6	2
November	28	<1	3
December	27	0	3

The best month has moved. On the 1961–1990 numbers the strongest month here was March (scoring 80); on 2011–2025 it is January (82). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in WAIMANALO EXP F 795.1’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	63%	37%	11%	46%	24.8–26.4°C
February	68%	33%	10%	43%	24.7–26.5°C
March	67%	33%	9%	40%	24.9–26.8°C
April	68%	32%	6%	38%	25.4–27.2°C
May	73%	27%	5%	29%	26.7–28.1°C
June	76%	24%	2%	28%	27.6–28.9°C
July	67%	32%	2%	41%	28.2–29.9°C
August	73%	26%	2%	25%	28.6–30.1°C
September	69%	30%	4%	34%	28.8–30.3°C
October	69%	31%	7%	39%	28.1–29.6°C
November	62%	38%	11%	49%	26.7–28.0°C
December	62%	38%	10%	49%	25.4–26.8°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.

1970Each stripe is one year’s mean temperature against the 46-year average. Warmest: 2020. Coolest: 1993.2020

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5849217
NOAA station: USC00519523 · WAIMANALO EXP F 795.1
Station distance: 4.8 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 28 usable years
Daylight: Calculated from latitude 21.38°, 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 WAIMANALO EXP F 795.1 is what differs

East Honolulu→Hawai‘i Kai→Niu Valley→Kuliouou - Kalani Iki→Kuli‘ou‘ou→Waimanalo→

Or put two places side by side: Keolu Hills vs East Honolulu

Best time to visitKeolu Hills.

February

June

February

The whole year,without the guesswork.

Keolu Hills runs +0.5°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Keolu Hills.

The whole year,
without the guesswork.

Keolu Hills runs +0.5°C
on the 1961–1990 baseline.

Nearby, measured,
and named.