Monthly Climate
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Best time to visit Kushiro

August is the best time to visit Kushiro for general sightseeing, with average highs of 20 °C and about 12 wet days. The comfortable season runs roughly July 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 August comfort 80/100
A beach holiday August sea 17 °C
The least cloud December 41 % average cloud cover
The least rain February 38 mm
Warmth August 20 °C
Cooler weather February -1.8 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 August 80 20 °C 12 40
2 September 78 19 °C 11 33
3 July 77 18 °C 12 23
4 June 65 14 °C 10 13
5 October 63 14 °C 10 11
6 May 49 11 °C 10 10
7 November 38 7.8 °C 9 13
8 April 32 6.8 °C 9 12
9 February 31 -1.8 °C 6 20
10 January 31 -1.8 °C 6 18
11 December 29 1.3 °C 8 15
12 March 27 1.8 °C 8 15

For a beach holiday

August scores highest, with a sea temperature of 17 °C and air temperatures around 20 °C. The sea never reaches 20 °C here.

Month Sea Air Sunshine Beach score
January 2.7 °C -1.8 °C 44 % 18
February 0.8 °C -1.8 °C 50 % 20
March 0.9 °C 1.8 °C 55 % 15
April 2.5 °C 6.8 °C 62 % 12
May 5.6 °C 11 °C 69 % 10
June 10 °C 14 °C 79 % 13
July 14 °C 18 °C 83 % 23
August 17 °C 20 °C 80 % 40
September 17 °C 19 °C 68 % 33
October 14 °C 14 °C 51 % 11
November 10 °C 7.8 °C 45 % 13
December 6.3 °C 1.3 °C 41 % 15

When to think twice

March scores lowest with about 8 wet days and highs near 1.8 °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 -1.8 °C 51 mm 44 %
February -1.8 °C 38 mm 50 %
March 1.8 °C 69 mm 55 %
April 6.8 °C 86 mm 62 %
May 11.3 °C 105 mm 69 %
June 14.4 °C 88 mm 79 %
July 18.3 °C 124 mm 83 %
August 20.4 °C 151 mm 80 %
September 18.7 °C 160 mm 68 %
October 14.0 °C 114 mm 51 %
November 7.8 °C 75 mm 45 %
December 1.3 °C 71 mm 41 %

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.