Monthly Climate
Menu

Best time to visit Nagaoka

May is the best time to visit Nagaoka for general sightseeing, with average highs of 22 °C and about 12 wet days. The comfortable season runs roughly May to June. The sea stays above 20 °C from July to October.

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 84/100
A beach holiday September sea 25 °C
The least cloud April 62 % average cloud cover
The least rain May 96 mm
Warmth August 30 °C
Cooler weather January 3.5 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 May 84 22 °C 12 35
2 June 79 25 °C 13 62
3 October 76 19 °C 15 47
4 September 76 26 °C 14 75
5 July 62 28 °C 16 73
6 April 61 16 °C 14 9
7 August 60 30 °C 14 74
8 November 46 13 °C 18 16
9 March 25 8.6 °C 19 0
10 December 16 6.8 °C 23 5
11 February 12 4.4 °C 20 0
12 January 11 3.5 °C 25 0

For a beach holiday

September scores highest, with a sea temperature of 25 °C and air temperatures around 26 °C. The sea is above 20 °C from July to October.

Month Sea Air Sunshine Beach score
January 12 °C 3.5 °C 77 % 0
February 11 °C 4.4 °C 74 % 0
March 9.9 °C 8.6 °C 69 % 0
April 11 °C 16 °C 62 % 9
May 15 °C 22 °C 64 % 35
June 20 °C 25 °C 73 % 62
July 23 °C 28 °C 74 % 73
August 27 °C 30 °C 62 % 74
September 25 °C 26 °C 68 % 75
October 22 °C 19 °C 64 % 47
November 18 °C 13 °C 67 % 16
December 15 °C 6.8 °C 74 % 5

When to think twice

January scores lowest with about 25 wet days and highs near 3.5 °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 3.5 °C 183 mm 77 %
February 4.4 °C 130 mm 74 %
March 8.6 °C 126 mm 69 %
April 15.9 °C 97 mm 62 %
May 21.7 °C 96 mm 64 %
June 25.3 °C 122 mm 73 %
July 28.2 °C 210 mm 74 %
August 29.8 °C 155 mm 62 %
September 25.6 °C 147 mm 68 %
October 19.5 °C 146 mm 64 %
November 13.2 °C 149 mm 67 %
December 6.8 °C 187 mm 74 %

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.