Hitachi climate

Name: Hitachi
Address: JP

Hitachi is warmest in August, with average highs of 27 °C, and coldest in January, when nights average 1.6 °C. October is the wettest month (197 mm) and December the driest (64 mm). Figures are 1991–2020 climate normals.

Across a full year Hitachi averages 1,531 mm of rain, 59 days above 25 °C and 16 days below freezing.

Japan · population 174,508 · 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 27 °C
Coldest month January 1.6 °C
Driest month December 64 mm
Wettest month October 197 mm
Least cloud January 40 % cloud
Hottest on record August 34 °C
Coldest on record January -8.3 °C
Warmest sea August 24 °C

What to expectHitachi through the year

Hitachi has a clear annual cycle: average daily highs run from 7.1 °C in January to 27 °C in August, a swing of 20 °C in mean temperature across the year.

Counted across a normal year, 59 days a year reach 25 °C, 5 of them reach 30 °C, 16 nights drop below freezing. The warmest reading in the 1991–2020 record is 34 °C, in August.

Rain is strongly seasonal. October averages 197 mm against 64 mm in December — 3.1 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Hitachi is warmest in August at 24 °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	7.1 °C	65 mm	40 %
February	7.6 °C	65 mm	48 %
March	10.6 °C	116 mm	57 %
April	15.2 °C	123 mm	61 %
May	19.3 °C	150 mm	69 %
June	22.1 °C	158 mm	80 %
July	25.6 °C	178 mm	78 %
August	27.0 °C	131 mm	69 %
September	24.1 °C	188 mm	69 %
October	19.4 °C	197 mm	62 %
November	14.6 °C	96 mm	51 %
December	9.5 °C	64 mm	40 %

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	7.1 °C	1.6 °C	4.0 °C	14.9 °C	-8.3 °C	0	0	6
February	7.6 °C	1.6 °C	4.2 °C	17.8 °C	-3.9 °C	0	0	7
March	10.6 °C	4.0 °C	6.9 °C	21.5 °C	-2.4 °C	0	0	1
April	15.2 °C	8.3 °C	11.4 °C	25.6 °C	-0.6 °C	0	0	0
May	19.3 °C	13.1 °C	15.9 °C	27.0 °C	4.5 °C	1	0	0
June	22.1 °C	17.3 °C	19.5 °C	30.4 °C	11.0 °C	4	0	0
July	25.6 °C	21.2 °C	23.1 °C	32.2 °C	14.8 °C	18	2	0
August	27.0 °C	22.7 °C	24.5 °C	33.6 °C	16.7 °C	25	3	0
September	24.1 °C	19.9 °C	21.7 °C	32.7 °C	12.5 °C	11	0	0
October	19.4 °C	14.8 °C	16.9 °C	30.8 °C	7.3 °C	1	0	0
November	14.6 °C	9.3 °C	11.7 °C	22.3 °C	1.7 °C	0	0	0
December	9.5 °C	4.2 °C	6.6 °C	21.1 °C	-3.0 °C	0	0	1

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	65 mm	7	9.9 h/day	40 %	66 %	19 km/h	14.3 °C
February	65 mm	8	11 h/day	48 %	66 %	20 km/h	12.8 °C
March	116 mm	13	12 h/day	57 %	69 %	19 km/h	12.8 °C
April	123 mm	12	13 h/day	61 %	74 %	19 km/h	14.2 °C
May	150 mm	13	14 h/day	69 %	80 %	17 km/h	16.5 °C
June	158 mm	16	15 h/day	80 %	86 %	15 km/h	19.1 °C
July	178 mm	16	14 h/day	78 %	88 %	14 km/h	21.5 °C
August	131 mm	13	14 h/day	69 %	87 %	15 km/h	24.0 °C
September	188 mm	15	12 h/day	69 %	83 %	17 km/h	23.2 °C
October	197 mm	13	11 h/day	62 %	78 %	17 km/h	20.6 °C
November	96 mm	9	10 h/day	51 %	74 %	16 km/h	18.6 °C
December	64 mm	8	9.7 h/day	40 %	69 %	18 km/h	16.3 °C

How Hitachi 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
Hitachi	27 °C	1.6 °C	1,531 mm	59
Hitachi-Naka · Japan	27 °C	1.3 °C	1,512 mm	63
Mito · Japan	28 °C	1.1 °C	1,541 mm	67
Iwaki · Japan	28 °C	1.1 °C	1,522 mm	65
Utsunomiya · Japan	28 °C	-2.5 °C	1,399 mm	80
Tsukuba · Japan	30 °C	-0.9 °C	1,412 mm	96

Where Hitachi ranks

Ranking	Position	Value
The coolest places in Asia in June	27thof 50	22 °C
The coolest places in Asia in May	48thof 50	19 °C

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

QuestionsCommon questions about Hitachi’s climate

When is the best time to visit Hitachi?

That depends on what you want, so the honest answer is a comparison rather than a single month. June, July, September 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 Hitachi get?

In August, the warmest month, daily highs average 27 °C. About 5 days a year pass 30 °C. The highest value in the 1991–2020 record is 34 °C.

How cold does it get in winter?

Nights average 1.6 °C in January, the coldest month. A normal year has 16 nights below freezing.

Which month is wettest in Hitachi?

October, averaging 197 mm over 13 days with rain. The driest month is December with 64 mm. The year as a whole averages 1,531 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 Hitachi 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.