Sakai climate

Name: Sakai
Address: JP

Sakai is warmest in August, with average highs of 31 °C, and coldest in January, when nights average 1.3 °C. June is the wettest month (202 mm) and January the driest (65 mm). Figures are 1991–2020 climate normals.

Across a full year Sakai averages 1,449 mm of rain, 113 days above 25 °C and 22 days below freezing.

Japan · population 826,161 · 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 August 31 °C
Coldest month January 1.3 °C
Driest month January 65 mm
Wettest month June 202 mm
Least cloud December 48 % cloud
Hottest on record August 38 °C
Coldest on record February -6.5 °C
Warmest sea August 27 °C

What to expectSakai through the year

Sakai has a clear annual cycle: average daily highs run from 8.0 °C in January to 31 °C in August, a swing of 23 °C in mean temperature across the year.

Counted across a normal year, 113 days a year reach 25 °C, 42 of them reach 30 °C, 22 nights drop below freezing. The warmest reading in the 1991–2020 record is 38 °C, in August.

Rain is strongly seasonal. June averages 202 mm against 65 mm in January — 3.1 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Sakai is warmest in August at 27 °C and coldest in February at 13 °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	8.0 °C	65 mm	52 %
February	9.0 °C	72 mm	56 %
March	12.5 °C	112 mm	58 %
April	17.9 °C	116 mm	59 %
May	22.6 °C	134 mm	65 %
June	25.9 °C	202 mm	78 %
July	29.4 °C	175 mm	70 %
August	31.2 °C	99 mm	57 %
September	27.4 °C	162 mm	60 %
October	21.5 °C	160 mm	52 %
November	15.9 °C	83 mm	49 %
December	10.4 °C	69 mm	48 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C	Days below 0 °C
January	8.0 °C	1.3 °C	4.4 °C	17.1 °C	-4.5 °C	0	0	9
February	9.0 °C	1.5 °C	4.9 °C	19.8 °C	-6.5 °C	0	0	8
March	12.5 °C	4.3 °C	8.2 °C	20.9 °C	-2.1 °C	0	0	3
April	17.9 °C	9.4 °C	13.4 °C	27.8 °C	0.3 °C	0	0	0
May	22.6 °C	14.4 °C	18.3 °C	29.6 °C	5.9 °C	6	0	0
June	25.9 °C	19.0 °C	22.2 °C	34.5 °C	11.7 °C	20	1	0
July	29.4 °C	23.2 °C	26.1 °C	35.9 °C	15.9 °C	30	13	0
August	31.2 °C	24.3 °C	27.4 °C	38.2 °C	18.0 °C	31	22	0
September	27.4 °C	20.5 °C	23.5 °C	35.3 °C	11.5 °C	23	6	0
October	21.5 °C	14.4 °C	17.6 °C	30.0 °C	4.9 °C	3	0	0
November	15.9 °C	8.5 °C	12.0 °C	26.0 °C	1.1 °C	0	0	0
December	10.4 °C	3.5 °C	6.7 °C	22.9 °C	-2.1 °C	0	0	3

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	65 mm	8	10 h/day	52 %	73 %	17 km/h	14.3 °C
February	72 mm	9	11 h/day	56 %	72 %	17 km/h	13.0 °C
March	112 mm	11	12 h/day	58 %	71 %	17 km/h	13.3 °C
April	116 mm	10	13 h/day	59 %	71 %	17 km/h	15.1 °C
May	134 mm	10	14 h/day	65 %	73 %	15 km/h	17.8 °C
June	202 mm	14	14 h/day	78 %	78 %	14 km/h	21.2 °C
July	175 mm	13	14 h/day	70 %	80 %	15 km/h	24.7 °C
August	99 mm	10	13 h/day	57 %	75 %	14 km/h	26.8 °C
September	162 mm	12	12 h/day	60 %	76 %	14 km/h	25.8 °C
October	160 mm	10	11 h/day	52 %	76 %	14 km/h	22.9 °C
November	83 mm	8	10 h/day	49 %	76 %	14 km/h	19.5 °C
December	69 mm	8	9.9 h/day	48 %	75 %	16 km/h	16.6 °C

How Sakai compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Sakai	31 °C	1.3 °C	1,449 mm	113
Izumi · Japan	31 °C	0.6 °C	1,456 mm	107
Osaka · Japan	32 °C	1.2 °C	1,455 mm	118
Kishiwada · Japan	31 °C	0.8 °C	1,481 mm	110
Nishinomiya · Japan	31 °C	1.5 °C	1,561 mm	119

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

QuestionsCommon questions about Sakai’s climate

When is the best time to visit Sakai?

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

How hot does Sakai get?

In August, the warmest month, daily highs average 31 °C. About 42 days a year pass 30 °C. The highest value in the 1991–2020 record is 38 °C.

How cold does it get in winter?

Nights average 1.3 °C in January, the coldest month. A normal year has 22 nights below freezing.

Which month is wettest in Sakai?

June, averaging 202 mm over 14 days with rain. The driest month is January with 65 mm. The year as a whole averages 1,449 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 Sakai 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
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.