Honolulu climate

Name: Honolulu
Address: US

Honolulu is warmest in September, with average highs of 28 °C, and coldest in February, when nights average 21 °C. March is the wettest month (53 mm) and June the driest (21 mm). Figures are 1991–2020 climate normals.

Across a full year Honolulu averages 401 mm of rain and 279 days above 25 °C.

United States · 5 m elevation · population 350,964 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month September 28 °C
Coldest month February 21 °C
Driest month June 21 mm
Wettest month March 53 mm
Least cloud January 40 % cloud
Hottest on record August 31 °C
Coldest on record February 15 °C
Warmest sea September 27 °C

What to expectHonolulu through the year

Honolulu has a clear annual cycle: average daily highs run from 24 °C in February to 28 °C in September, a swing of 3.6 °C in mean temperature across the year.

Counted across a normal year, 279 days a year reach 25 °C, 2 of them reach 30 °C. The warmest reading in the 1991–2020 record is 31 °C, in August.

Rain is spread fairly evenly through the year, from 21 mm in June to 53 mm in March. There is no dry season to aim for.

The sea off Honolulu is warmest in September at 27 °C and coldest in February at 24 °C. Sea temperature lags the air by a month or two, which is why late summer swims warmer than early summer at the same air temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	24.7 °C	40 mm	40 %
February	24.4 °C	37 mm	45 %
March	24.6 °C	53 mm	49 %
April	25.3 °C	27 mm	49 %
May	26.3 °C	28 mm	46 %
June	27.1 °C	21 mm	43 %
July	27.6 °C	22 mm	45 %
August	28.0 °C	23 mm	43 %
September	28.1 °C	22 mm	41 %
October	27.6 °C	33 mm	48 %
November	26.4 °C	45 mm	48 %
December	25.3 °C	48 mm	44 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	24.7 °C	21.2 °C	22.7 °C	27.7 °C	17.3 °C	12	0
February	24.4 °C	21.0 °C	22.4 °C	27.2 °C	14.9 °C	8	0
March	24.6 °C	21.2 °C	22.6 °C	27.9 °C	16.4 °C	12	0
April	25.3 °C	21.8 °C	23.2 °C	28.1 °C	16.8 °C	18	0
May	26.3 °C	22.6 °C	24.1 °C	29.4 °C	18.6 °C	28	0
June	27.1 °C	23.6 °C	25.0 °C	30.1 °C	20.4 °C	30	0
July	27.6 °C	24.1 °C	25.5 °C	30.5 °C	22.2 °C	31	0
August	28.0 °C	24.5 °C	25.9 °C	31.3 °C	22.4 °C	31	1
September	28.1 °C	24.5 °C	25.9 °C	31.0 °C	21.6 °C	30	1
October	27.6 °C	24.2 °C	25.5 °C	30.9 °C	19.8 °C	31	0
November	26.4 °C	23.3 °C	24.5 °C	29.8 °C	18.6 °C	28	0
December	25.3 °C	22.2 °C	23.5 °C	28.5 °C	16.3 °C	20	0

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	40 mm	7	11 h/day	40 %	72 %	22 km/h	24.4 °C
February	37 mm	6	11 h/day	45 %	73 %	23 km/h	24.0 °C
March	53 mm	8	12 h/day	49 %	73 %	23 km/h	24.0 °C
April	27 mm	8	13 h/day	49 %	73 %	24 km/h	24.4 °C
May	28 mm	7	13 h/day	46 %	72 %	22 km/h	25.0 °C
June	21 mm	7	13 h/day	43 %	73 %	24 km/h	25.7 °C
July	22 mm	7	13 h/day	45 %	74 %	25 km/h	26.0 °C
August	23 mm	6	13 h/day	43 %	74 %	24 km/h	26.5 °C
September	22 mm	7	12 h/day	41 %	74 %	22 km/h	26.8 °C
October	33 mm	6	12 h/day	48 %	74 %	22 km/h	26.7 °C
November	45 mm	6	11 h/day	48 %	74 %	24 km/h	26.0 °C
December	48 mm	6	11 h/day	44 %	74 %	24 km/h	25.1 °C

Where Honolulu ranks

Ranking	Position	Value
Best beach destinations in the world year-round	6th of 50	90/100
Best beach destinations in the world in May	32nd of 50	91/100
The driest places in North America year-round	37th of 50	33 mm
The driest places in North America in September	43rd of 50	22 mm
Best beach destinations in the world in November	46th of 50	93/100
The driest places in North America in August	50th of 50	23 mm

Planning a trip? See the best time to visit Honolulu.

QuestionsCommon questions about Honolulu’s climate

When is the best time to visit Honolulu?

That depends on what you want, so the honest answer is a comparison rather than a single month. January, February, March sit closest to 20 °C on average, September is the warmest month and June the driest. The month-by-month table above has the full picture.

How hot does Honolulu get?

In September, the warmest month, daily highs average 28 °C. About 2 days a year pass 30 °C. The highest value in the 1991–2020 record is 31 °C.

How cold does it get in winter?

Nights average 21 °C in February, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Honolulu?

March, averaging 53 mm over 8 days with rain. The driest month is June with 21 mm. The year as a whole averages 401 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Honolulu rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Data point: 21.307°, -157.858° , 5 m above sea level (the coordinates the reanalysis values are taken for)
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.