Monthly Climate
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Best time to visit Hachinohe

June is the best time to visit Hachinohe for general sightseeing, with average highs of 21 °C and about 11 wet days. The comfortable season runs roughly May to July. The sea stays above 20 °C from August to September.

It depends what you are going for

One month rarely wins on everything. These are the best months on each measure taken on its own.

If you want Best month On that measure
Sightseeing and walking June comfort 85/100
A beach holiday August sea 21 °C
The least cloud November 52 % average cloud cover
The least rain January 48 mm
Warmth August 26 °C
Cooler weather January 1.2 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 June 85 21 °C 11 34
2 September 84 23 °C 12 63
3 May 77 18 °C 11 23
4 July 77 25 °C 13 53
5 October 76 17 °C 10 38
6 August 72 26 °C 13 68
7 April 54 13 °C 11 8
8 November 49 11 °C 9 18
9 January 29 1.2 °C 7 16
10 February 29 1.9 °C 8 16
11 December 28 3.9 °C 8 15
12 March 28 6.4 °C 10 10

For a beach holiday

August scores highest, with a sea temperature of 21 °C and air temperatures around 26 °C. The sea is above 20 °C from August to September.

Month Sea Air Sunshine Beach score
January 9.7 °C 1.2 °C 55 % 16
February 7.5 °C 1.9 °C 57 % 16
March 6.6 °C 6.4 °C 57 % 10
April 7.6 °C 13 °C 57 % 8
May 10 °C 18 °C 62 % 23
June 14 °C 21 °C 72 % 34
July 18 °C 25 °C 76 % 53
August 21 °C 26 °C 71 % 68
September 21 °C 23 °C 67 % 63
October 18 °C 17 °C 56 % 38
November 15 °C 11 °C 52 % 18
December 12 °C 3.9 °C 55 % 15

When to think twice

March scores lowest with about 10 wet days and highs near 6.4 °C. That does not make it a bad month — it depends entirely on what you are travelling for. The numbers are all here; the judgement is yours.

The full year

Month Avg high Rainfall Cloud
January 1.2 °C 48 mm 55 %
February 1.9 °C 50 mm 57 %
March 6.4 °C 74 mm 57 %
April 13.0 °C 78 mm 57 %
May 18.3 °C 90 mm 62 %
June 21.4 °C 94 mm 72 %
July 24.8 °C 137 mm 76 %
August 26.2 °C 139 mm 71 %
September 23.0 °C 132 mm 67 %
October 17.2 °C 101 mm 56 %
November 10.5 °C 55 mm 52 %
December 3.9 °C 52 mm 55 %

Data sources and method

Normal period
1991–2020
Dataset version
era5-1991-2020-scores1.1
Last processed

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: comfort score, beach score, season boundaries. 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.