Monthly Climate
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Best time to visit Sapporo

September is the best time to visit Sapporo for general sightseeing, with average highs of 21 °C and about 14 wet days. The comfortable season runs roughly June 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 September comfort 81/100
The least cloud April 60 % average cloud cover
The least rain February 49 mm
Warmth August 24 °C
Cooler weather January -3.2 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days
1 September 81 21 °C 14
2 June 81 20 °C 12
3 July 79 23 °C 14
4 August 77 24 °C 14
5 May 64 16 °C 13
6 October 61 15 °C 13
7 April 39 9.3 °C 11
8 November 29 6.9 °C 14
9 February 28 -2.5 °C 9
10 January 26 -3.2 °C 11
11 March 25 1.7 °C 12
12 December 23 -0.4 °C 13

When to think twice

December scores lowest with about 13 wet days and highs near -0.4 °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 -3.2 °C 53 mm 72 %
February -2.5 °C 49 mm 69 %
March 1.7 °C 63 mm 63 %
April 9.3 °C 72 mm 60 %
May 15.8 °C 93 mm 66 %
June 19.7 °C 89 mm 71 %
July 23.4 °C 134 mm 75 %
August 24.3 °C 189 mm 74 %
September 20.7 °C 155 mm 68 %
October 14.5 °C 100 mm 61 %
November 6.9 °C 89 mm 65 %
December -0.4 °C 76 mm 71 %

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.