Hakodate climate

Name: Hakodate
Address: JP

Hakodate is warmest in August, with average highs of 24 °C, and coldest in January, when nights average -5.4 °C. August is the wettest month (179 mm) and January the driest (49 mm). Figures are 1991–2020 climate normals.

Across a full year Hakodate averages 1,176 mm of rain, 17 days above 25 °C and 113 days below freezing.

Japan · population 275,730 · 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 24 °C
Coldest month January -5.4 °C
Driest month January 49 mm
Wettest month August 179 mm
Least cloud October 56 % cloud
Hottest on record August 30 °C
Coldest on record January -18 °C
Warmest sea August 23 °C

What to expectHakodate through the year

Hakodate has a clear annual cycle: average daily highs run from -0.5 °C in January to 24 °C in August, a swing of 24 °C in mean temperature across the year.

Counted across a normal year, 17 days a year reach 25 °C, 0 of them reach 30 °C, 113 nights drop below freezing. The warmest reading in the 1991–2020 record is 30 °C, in August.

Rain is strongly seasonal. August averages 179 mm against 49 mm in January — 3.6 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Hakodate is warmest in August at 23 °C and coldest in February at 7.5 °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	-0.5 °C	49 mm	66 %
February	0.0 °C	51 mm	65 %
March	3.6 °C	66 mm	59 %
April	8.9 °C	77 mm	59 %
May	14.0 °C	99 mm	66 %
June	17.9 °C	92 mm	73 %
July	21.7 °C	140 mm	79 %
August	23.8 °C	179 mm	73 %
September	21.3 °C	160 mm	64 %
October	15.2 °C	107 mm	56 %
November	8.0 °C	87 mm	61 %
December	1.9 °C	68 mm	65 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days below 0 °C
January	-0.5 °C	-5.4 °C	-2.9 °C	8.4 °C	-17.7 °C	0	30
February	0.0 °C	-5.2 °C	-2.5 °C	11.3 °C	-16.7 °C	0	27
March	3.6 °C	-1.9 °C	0.7 °C	13.4 °C	-10.2 °C	0	22
April	8.9 °C	2.7 °C	5.6 °C	19.5 °C	-6.9 °C	0	5
May	14.0 °C	8.0 °C	10.8 °C	23.8 °C	0.2 °C	0	0
June	17.9 °C	12.8 °C	15.2 °C	25.2 °C	6.5 °C	0	0
July	21.7 °C	17.5 °C	19.4 °C	29.2 °C	11.0 °C	4	0
August	23.8 °C	19.7 °C	21.6 °C	30.2 °C	11.9 °C	10	0
September	21.3 °C	16.8 °C	19.0 °C	29.0 °C	6.8 °C	2	0
October	15.2 °C	10.3 °C	12.7 °C	23.1 °C	1.1 °C	0	0
November	8.0 °C	3.2 °C	5.5 °C	17.8 °C	-6.0 °C	0	6
December	1.9 °C	-2.5 °C	-0.3 °C	13.9 °C	-11.8 °C	0	24

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	49 mm	8	9.5 h/day	66 %	75 %	23 km/h	9.7 °C
February	51 mm	8	11 h/day	65 %	75 %	23 km/h	7.5 °C
March	66 mm	10	12 h/day	59 %	76 %	23 km/h	7.5 °C
April	77 mm	10	13 h/day	59 %	78 %	22 km/h	8.7 °C
May	99 mm	11	15 h/day	66 %	83 %	19 km/h	10.9 °C
June	92 mm	10	15 h/day	73 %	87 %	17 km/h	14.6 °C
July	140 mm	13	15 h/day	79 %	89 %	17 km/h	18.9 °C
August	179 mm	13	14 h/day	73 %	87 %	18 km/h	22.5 °C
September	160 mm	12	13 h/day	64 %	80 %	20 km/h	22.4 °C
October	107 mm	12	11 h/day	56 %	76 %	22 km/h	19.0 °C
November	87 mm	12	9.8 h/day	61 %	75 %	23 km/h	15.4 °C
December	68 mm	10	9.2 h/day	65 %	73 %	24 km/h	12.5 °C

How Hakodate 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
Hakodate	24 °C	-5.4 °C	1,176 mm	17
Aomori · Japan	27 °C	-5.7 °C	1,300 mm	54
Tomakomai · Japan	23 °C	-7.6 °C	1,215 mm	7
Hirosaki · Japan	27 °C	-6.3 °C	1,416 mm	59
Sapporo · Japan	24 °C	-9.4 °C	1,162 mm	25
Hachinohe · Japan	26 °C	-5.1 °C	1,050 mm	49
Morioka · Japan	26 °C	-7.5 °C	1,219 mm	52

Where Hakodate ranks

Ranking	Position	Value
The coolest places in Asia in June	5thof 50	18 °C
The coolest places in Asia in May	5thof 50	14 °C
The coolest places in Asia in April	8thof 50	8.9 °C
The coolest places in Asia in July	12thof 50	22 °C
The coolest places in Asia in August	34thof 50	24 °C
The coolest places in Asia in March	39thof 50	3.6 °C

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

QuestionsCommon questions about Hakodate’s climate

When is the best time to visit Hakodate?

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

In August, the warmest month, daily highs average 24 °C. About 0 days a year pass 30 °C. The highest value in the 1991–2020 record is 30 °C.

How cold does it get in winter?

Nights average -5.4 °C in January, the coldest month. A normal year has 113 nights below freezing.

Which month is wettest in Hakodate?

August, averaging 179 mm over 13 days with rain. The driest month is January with 49 mm. The year as a whole averages 1,176 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 Hakodate 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.