United States · 1991–2020

Best time to visit
Keaukaha.

January leads for comfortable weather in Keaukaha: typically 26.6°C by day, 17.7°C at night, with 200 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJanuary

Typical high26.6°C

Typical low17.7°C

Rain in January200 mm

Comfort

January

January · February · May

55climate match

Beach

May

May · June · September

51climate match

Outdoors

January

January · May · February

27climate match

The weakest month is November, scoring 18 against January’s 55 — 366 mm of rain falls.

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

5526.6° / 17.7°

Feb

4626.4° / 17.8°

Mar

3226.4° / 18.4°

Apr

3926.7° / 18.9°

May

4527.7° / 19.5°

Jun

3928.2° / 20.2°

Jul

2828.8° / 20.9°

Aug

2029° / 21.2°

Sep

3129.2° / 20.9°

Oct

2728.7° / 20.5°

Nov

1827.5° / 19.7°

Dec

3226.6° / 18.6°

Monthly climate evidence for Keaukaha — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 19 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	26.6°C	17.7°C	200 mm	12.3	24.3°C	11 h 03	55	Strong coverage
February	26.4°C	17.8°C	260 mm	13.7	24.1°C	11 h 28	46	Strong coverage
March	26.4°C	18.4°C	322 mm	18.7	24.0°C	11 h 59	32	Strong coverage
April	26.7°C	18.9°C	239 mm	20.8	24.3°C	12 h 34	39	Strong coverage
May	27.7°C	19.5°C	178 mm	18.8	24.9°C	13 h 03	45	Strong coverage
June	28.2°C	20.2°C	185 mm	21.3	25.4°C	13 h 19	39	Strong coverage
July	28.8°C	20.9°C	235 mm	22.9	25.9°C	13 h 13	28	Strong coverage
August	29°C	21.2°C	287 mm	22.6	26.3°C	12 h 48	20	Strong coverage
September	29.2°C	20.9°C	222 mm	20.3	26.6°C	12 h 14	31	Strong coverage
October	28.7°C	20.5°C	260 mm	20.3	26.5°C	11 h 40	27	Strong coverage
November	27.5°C	19.7°C	366 mm	20	25.8°C	11 h 11	18	Strong coverage
December	26.6°C	18.6°C	309 mm	18.8	24.9°C	10 h 57	32	Strong coverage

What has changed

Keaukaha 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

+0.6

Feb

+0.2

Mar

+0.4

Apr

+0.9

May

+0.6

Jun

+0.2

Jul

+0.7

Aug

+0.6

Sep

+0.8

Oct

+0.7

Nov

+0.2

Dec

+0.1

January daytime highs, 2011–2025. Last recorded: 27.0°C.

Records at HILO INTL AP 87, 1949–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	33.3°C28 Jan 1997	12.2°C21 Jan 1980	310 mm29 Jan 2002	819 mm1979 · driest 3 mm in 1998	77
February	33.3°C20 Feb 1968	11.7°C21 Feb 1962	429 mm20 Feb 1979	1157 mm1979 · driest 13 mm in 2000	77
March	33.9°C23 Mar 1972	12.2°C18 Mar 1971	398 mm17 Mar 1980	1268 mm1980 · driest 23 mm in 1972	77
April	31.7°C29 Apr 2017	14.4°C2 Apr 2013	245 mm23 Apr 1971	1098 mm1986 · driest 75 mm in 1962	76
May	34.4°C20 May 1966	14.4°C23 May 2024	200 mm15 May 1989	636 mm1964 · driest 54 mm in 2009	77
June	32.2°C24 Jun 1969	16.1°C26 Jun 1956	86 mm26 Jun 1997	576 mm1997 · driest 46 mm in 1985	77
July	33.9°C26 Jul 2020	16.7°C11 Jul 1970	150 mm21 Jul 1987	726 mm1982 · driest 90 mm in 1999	77
August	33.9°C15 Aug 1950	17.2°C1 Aug 1955	381 mm24 Aug 2018	1250 mm2018 · driest 32 mm in 2025	76
September	33.9°C26 Sep 2014	16.1°C30 Sep 1970	220 mm19 Sep 1994	636 mm2015 · driest 40 mm in 1974	76
October	32.8°C2 Oct 1976	16.7°C11 Oct 1955	219 mm28 Oct 1961	663 mm1951 · driest 35 mm in 2023	77
November	34.4°C28 Nov 2013	14.4°C15 Nov 1949	411 mm2 Nov 2000	1166 mm2000 · driest 26 mm in 1989	77
December	33.9°C14 Dec 1980	12.8°C23 Dec 1977	257 mm26 Dec 2008	1291 mm1954 · driest 7 mm in 1980	77

Typical days per month at HILO INTL AP 87, 1991–2020
Month	Days 25°C+	Days 30°C+	Heavy rain (10 mm+)
January	27	1	5
February	23	1	6
March	25	<1	8
April	27	<1	8
May	30	2	5
June	30	3	6
July	31	7	7
August	31	9	7
September	30	10	6
October	31	8	8
November	29	2	9
December	27	<1	8

The best month has moved. On the 1961–1990 numbers the strongest month here was June (scoring 60); on 2011–2025 it is January (65). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in HILO INTL AP 87’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	56%	44%	19%	53%	25.3–27.8°C
February	48%	52%	23%	67%	25.0–27.6°C
March	37%	63%	27%	81%	25.1–27.8°C
April	28%	72%	28%	90%	25.4–27.8°C
May	32%	68%	20%	86%	26.0–28.6°C
June	32%	68%	17%	90%	27.1–29.2°C
July	25%	76%	22%	96%	27.4–29.5°C
August	27%	73%	21%	93%	27.8–29.8°C
September	34%	66%	19%	87%	27.8–29.9°C
October	35%	65%	23%	85%	27.4–29.6°C
November	34%	67%	30%	83%	26.3–28.5°C
December	41%	60%	26%	73%	25.2–27.7°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.

1950Each stripe is one year’s mean temperature against the 75-year average. Warmest: 2020. Coolest: 1955.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5849077
NOAA station: USW00021504 · HILO INTL AP 87
Station distance: 1.1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 19.73°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 19 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 HILO INTL AP 87 is what differs

Hilo→Pepeekeo→Pāpa‘ikou→Wainaku→Paukaa→Kawainui→

Or put two places side by side: Keaukaha vs Hilo

Best time to visitKeaukaha.

January

May

January

The whole year,without the guesswork.

Keaukaha runs +0.5°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Keaukaha.

The whole year,
without the guesswork.

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

Nearby, measured,
and named.