Yokohama climate

Name: Yokohama
Address: JP

Yokohama is warmest in August, with average highs of 28 °C, and coldest in January, when nights average 2.4 °C. October is the wettest month (210 mm) and December the driest (63 mm). Figures are 1991–2020 climate normals.

Across a full year Yokohama averages 1,493 mm of rain, 75 days above 25 °C and 8 days below freezing.

Japan · population 3,777,491 · 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 28 °C
Coldest month January 2.4 °C
Driest month December 63 mm
Wettest month October 210 mm
Least cloud January 43 % cloud
Hottest on record July 35 °C
Coldest on record February -7.4 °C
Warmest sea August 26 °C

What to expectYokohama through the year

Yokohama has a clear annual cycle: average daily highs run from 8.5 °C in January to 28 °C in August, a swing of 20 °C in mean temperature across the year.

Counted across a normal year, 75 days a year reach 25 °C, 7 of them reach 30 °C, 8 nights drop below freezing. The warmest reading in the 1991–2020 record is 35 °C, in July.

Rain is strongly seasonal. October averages 210 mm against 63 mm in December — 3.3 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Yokohama is warmest in August at 26 °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	8.5 °C	73 mm	43 %
February	9.1 °C	74 mm	51 %
March	12.0 °C	125 mm	59 %
April	16.3 °C	117 mm	62 %
May	20.3 °C	129 mm	68 %
June	23.1 °C	174 mm	80 %
July	26.5 °C	143 mm	73 %
August	28.0 °C	104 mm	62 %
September	25.1 °C	185 mm	65 %
October	20.3 °C	210 mm	61 %
November	15.6 °C	94 mm	54 %
December	11.0 °C	63 mm	45 %

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	8.5 °C	2.4 °C	5.3 °C	17.9 °C	-5.0 °C	0	0	4
February	9.1 °C	2.7 °C	5.8 °C	19.0 °C	-7.4 °C	0	0	3
March	12.0 °C	5.7 °C	8.8 °C	20.8 °C	-1.2 °C	0	0	0
April	16.3 °C	10.4 °C	13.3 °C	24.7 °C	1.3 °C	0	0	0
May	20.3 °C	15.1 °C	17.6 °C	28.3 °C	6.1 °C	1	0	0
June	23.1 °C	18.8 °C	20.8 °C	29.5 °C	12.1 °C	5	0	0
July	26.5 °C	22.5 °C	24.3 °C	35.2 °C	16.7 °C	23	2	0
August	28.0 °C	23.8 °C	25.7 °C	34.7 °C	17.4 °C	29	4	0
September	25.1 °C	20.8 °C	22.8 °C	33.1 °C	13.1 °C	17	1	0
October	20.3 °C	15.5 °C	17.8 °C	30.2 °C	7.9 °C	1	0	0
November	15.6 °C	10.2 °C	12.8 °C	22.9 °C	1.7 °C	0	0	0
December	11.0 °C	5.2 °C	7.9 °C	22.3 °C	-3.3 °C	0	0	1

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	73 mm	7	10 h/day	43 %	65 %	26 km/h	14.5 °C
February	74 mm	8	11 h/day	51 %	66 %	26 km/h	13.4 °C
March	125 mm	12	12 h/day	59 %	69 %	29 km/h	13.9 °C
April	117 mm	11	13 h/day	62 %	74 %	29 km/h	15.5 °C
May	129 mm	11	14 h/day	68 %	79 %	26 km/h	18.2 °C
June	174 mm	14	15 h/day	80 %	84 %	24 km/h	21.0 °C
July	143 mm	12	14 h/day	73 %	86 %	24 km/h	23.5 °C
August	104 mm	11	14 h/day	62 %	84 %	23 km/h	25.8 °C
September	185 mm	13	12 h/day	65 %	81 %	24 km/h	24.8 °C
October	210 mm	12	11 h/day	61 %	77 %	24 km/h	22.0 °C
November	94 mm	9	10 h/day	54 %	73 %	24 km/h	19.5 °C
December	63 mm	7	9.8 h/day	45 %	68 %	25 km/h	16.7 °C

How Yokohama 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
Yokohama	28 °C	2.4 °C	1,493 mm	75
Kawasaki · Japan	29 °C	1.6 °C	1,484 mm	87
Yokosuka · Japan	27 °C	4.3 °C	1,517 mm	70
Fujisawa · Japan	28 °C	3.1 °C	1,601 mm	72
Machida · Japan	28 °C	0.4 °C	1,619 mm	75
Atsugi · Japan	28 °C	1.8 °C	1,863 mm	74
Tokyo · Japan	30 °C	-0.3 °C	1,465 mm	93

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

QuestionsCommon questions about Yokohama’s climate

When is the best time to visit Yokohama?

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 December the driest. The month-by-month table above has the full picture.

How hot does Yokohama get?

In August, the warmest month, daily highs average 28 °C. About 7 days a year pass 30 °C. The highest value in the 1991–2020 record is 35 °C.

How cold does it get in winter?

Nights average 2.4 °C in January, the coldest month. A normal year has 8 nights below freezing.

Which month is wettest in Yokohama?

October, averaging 210 mm over 12 days with rain. The driest month is December with 63 mm. The year as a whole averages 1,493 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 Yokohama 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: 35.433°, 139.650° (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.