Monthly Climate
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Best time to visit Hadano

May is the best time to visit Hadano for general sightseeing, with average highs of 21 °C and about 13 wet days. The comfortable season runs roughly May to June. The sea stays above 20 °C from June to November.

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 May comfort 82/100
A beach holiday August sea 26 °C
The least cloud January 43 % average cloud cover
The least rain December 76 mm
Warmth August 28 °C
Cooler weather January 8.3 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 May 82 21 °C 13 45
2 October 82 20 °C 13 58
3 June 74 24 °C 17 60
4 September 72 25 °C 15 73
5 November 71 16 °C 10 40
6 April 70 17 °C 14 23
7 July 61 27 °C 16 74
8 August 58 28 °C 15 74
9 December 55 11 °C 8 31
10 March 50 12 °C 15 6
11 January 44 8.3 °C 8 22
12 February 43 8.9 °C 10 15

For a beach holiday

August scores highest, with a sea temperature of 26 °C and air temperatures around 28 °C. The sea is above 20 °C from June to November.

Month Sea Air Sunshine Beach score
January 16 °C 8.3 °C 43 % 22
February 15 °C 8.9 °C 51 % 15
March 16 °C 12 °C 60 % 6
April 17 °C 17 °C 64 % 23
May 19 °C 21 °C 71 % 45
June 21 °C 24 °C 83 % 60
July 24 °C 27 °C 76 % 74
August 26 °C 28 °C 67 % 74
September 25 °C 25 °C 70 % 73
October 23 °C 20 °C 64 % 58
November 21 °C 16 °C 54 % 40
December 18 °C 11 °C 44 % 31

When to think twice

February scores lowest with about 10 wet days and highs near 8.9 °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 8.3 °C 84 mm 43 %
February 8.9 °C 90 mm 51 %
March 12.1 °C 153 mm 60 %
April 16.8 °C 149 mm 64 %
May 20.9 °C 162 mm 71 %
June 23.7 °C 213 mm 83 %
July 27.4 °C 206 mm 76 %
August 28.5 °C 163 mm 67 %
September 25.4 °C 235 mm 70 %
October 20.4 °C 225 mm 64 %
November 15.6 °C 108 mm 54 %
December 10.8 °C 76 mm 44 %

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.