Yokkaichi climate

Name: Yokkaichi
Address: JP

Yokkaichi is warmest in August, with average highs of 30 °C, and coldest in January, when nights average 0.7 °C. September is the wettest month (235 mm) and December the driest (61 mm). Figures are 1991–2020 climate normals.

Across a full year Yokkaichi averages 1,707 mm of rain, 106 days above 25 °C and 33 days below freezing.

Japan · population 305,424 · 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 30 °C
Coldest month January 0.7 °C
Driest month December 61 mm
Wettest month September 235 mm
Least cloud December 43 % cloud
Hottest on record August 38 °C
Coldest on record February -7.5 °C
Warmest sea August 27 °C

What to expectYokkaichi through the year

Yokkaichi has a clear annual cycle: average daily highs run from 8.2 °C in January to 30 °C in August, a swing of 23 °C in mean temperature across the year.

Counted across a normal year, 106 days a year reach 25 °C, 33 of them reach 30 °C, 33 nights drop below freezing. The warmest reading in the 1991–2020 record is 38 °C, in August.

Rain is strongly seasonal. September averages 235 mm against 61 mm in December — 3.9 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Yokkaichi 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	8.2 °C	62 mm	46 %
February	9.1 °C	70 mm	51 %
March	12.7 °C	116 mm	55 %
April	17.8 °C	136 mm	59 %
May	22.2 °C	160 mm	66 %
June	25.5 °C	215 mm	79 %
July	29.1 °C	216 mm	74 %
August	30.2 °C	151 mm	63 %
September	26.7 °C	235 mm	63 %
October	21.4 °C	195 mm	54 %
November	16.0 °C	89 mm	47 %
December	10.6 °C	61 mm	43 %

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	8.2 °C	0.7 °C	4.0 °C	17.0 °C	-6.9 °C	0	0	13
February	9.1 °C	1.0 °C	4.6 °C	19.3 °C	-7.5 °C	0	0	12
March	12.7 °C	3.9 °C	8.0 °C	22.5 °C	-3.2 °C	0	0	4
April	17.8 °C	8.8 °C	13.0 °C	27.2 °C	-0.4 °C	0	0	0
May	22.2 °C	13.9 °C	17.8 °C	30.7 °C	4.7 °C	4	0	0
June	25.5 °C	18.5 °C	21.7 °C	34.2 °C	11.3 °C	17	1	0
July	29.1 °C	22.8 °C	25.6 °C	35.8 °C	16.7 °C	29	12	0
August	30.2 °C	23.7 °C	26.6 °C	37.5 °C	17.2 °C	30	17	0
September	26.7 °C	20.3 °C	23.2 °C	35.7 °C	10.7 °C	22	3	0
October	21.4 °C	14.3 °C	17.5 °C	28.8 °C	5.9 °C	3	0	0
November	16.0 °C	8.2 °C	11.7 °C	26.8 °C	0.4 °C	0	0	0
December	10.6 °C	3.0 °C	6.4 °C	21.7 °C	-3.7 °C	0	0	4

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	62 mm	6	10 h/day	46 %	72 %	21 km/h	14.0 °C
February	70 mm	8	11 h/day	51 %	71 %	21 km/h	13.2 °C
March	116 mm	11	12 h/day	55 %	71 %	21 km/h	13.5 °C
April	136 mm	11	13 h/day	59 %	73 %	20 km/h	15.2 °C
May	160 mm	11	14 h/day	66 %	76 %	18 km/h	18.4 °C
June	215 mm	15	15 h/day	79 %	81 %	16 km/h	21.8 °C
July	216 mm	17	14 h/day	74 %	84 %	15 km/h	25.5 °C
August	151 mm	15	13 h/day	63 %	81 %	16 km/h	27.4 °C
September	235 mm	14	12 h/day	63 %	80 %	16 km/h	25.7 °C
October	195 mm	11	11 h/day	54 %	78 %	16 km/h	22.3 °C
November	89 mm	7	10 h/day	47 %	76 %	17 km/h	19.4 °C
December	61 mm	6	9.8 h/day	43 %	74 %	19 km/h	16.4 °C

How Yokkaichi 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
Yokkaichi	30 °C	0.7 °C	1,707 mm	106
Tsu · Japan	30 °C	2.5 °C	1,884 mm	106
Nagoya · Japan	31 °C	-0.6 °C	1,519 mm	113
Ichinomiya · Japan	30 °C	-0.9 °C	1,884 mm	109
Nishio · Japan	30 °C	1.4 °C	1,497 mm	102
Anjō · Japan	31 °C	-0.08 °C	1,493 mm	111
Ōgaki · Japan	30 °C	-0.5 °C	1,913 mm	107

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

QuestionsCommon questions about Yokkaichi’s climate

When is the best time to visit Yokkaichi?

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 Yokkaichi get?

In August, the warmest month, daily highs average 30 °C. About 33 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 0.7 °C in January, the coldest month. A normal year has 33 nights below freezing.

Which month is wettest in Yokkaichi?

September, averaging 235 mm over 14 days with rain. The driest month is December with 61 mm. The year as a whole averages 1,707 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 Yokkaichi 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.