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Best time to visit Hiroshima

October is the best time to visit Hiroshima for general sightseeing, with average highs of 22 °C and about 8 wet days.

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 October comfort 91/100
The least cloud October 52 % average cloud cover
The least rain January 56 mm
Warmth August 30 °C
Cooler weather January 8.4 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days
1 October 91 22 °C 8
2 May 87 23 °C 11
3 April 80 18 °C 11
4 November 75 16 °C 8
5 June 74 26 °C 15
6 September 73 27 °C 13
7 March 57 13 °C 12
8 July 57 29 °C 16
9 August 55 30 °C 14
10 December 51 11 °C 9
11 February 47 9.5 °C 9
12 January 43 8.4 °C 9

When to think twice

January scores lowest with about 9 wet days and highs near 8.4 °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 8.4 °C 56 mm 60 %
February 9.5 °C 69 mm 61 %
March 13.1 °C 110 mm 60 %
April 18.2 °C 128 mm 60 %
May 22.6 °C 142 mm 64 %
June 25.6 °C 223 mm 78 %
July 29.0 °C 250 mm 73 %
August 30.4 °C 157 mm 62 %
September 27.0 °C 185 mm 63 %
October 21.7 °C 109 mm 52 %
November 16.0 °C 70 mm 52 %
December 10.5 °C 63 mm 56 %

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.