Monthly Climate
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Best time to visit Tomakomai

July is the best time to visit Tomakomai 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 July comfort 79/100
A beach holiday August sea 20 °C
The least cloud October 55 % average cloud cover
The least rain February 45 mm
Warmth August 23 °C
Cooler weather January -1.9 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 July 79 21 °C 14 37
2 September 79 20 °C 14 44
3 August 78 23 °C 15 53
4 June 73 17 °C 12 16
5 October 64 14 °C 12 16
6 May 55 13 °C 13 5
7 November 36 7.3 °C 10 10
8 April 36 7.8 °C 10 10
9 February 31 -1.3 °C 7 17
10 January 30 -1.9 °C 8 16
11 December 30 0.8 °C 8 14
12 March 27 2.4 °C 10 11

For a beach holiday

August scores highest, with a sea temperature of 20 °C and air temperatures around 23 °C. The sea never reaches 20 °C here.

Month Sea Air Sunshine Beach score
January 6.2 °C -1.9 °C 59 % 16
February 3.5 °C -1.3 °C 58 % 17
March 3.2 °C 2.4 °C 58 % 11
April 4.9 °C 7.8 °C 59 % 10
May 8.1 °C 13 °C 66 % 5
June 13 °C 17 °C 72 % 16
July 17 °C 21 °C 77 % 37
August 20 °C 23 °C 74 % 53
September 20 °C 20 °C 66 % 44
October 16 °C 14 °C 55 % 16
November 13 °C 7.3 °C 55 % 10
December 9.5 °C 0.8 °C 60 % 14

When to think twice

March scores lowest with about 10 wet days and highs near 2.4 °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 -1.9 °C 45 mm 59 %
February -1.3 °C 45 mm 58 %
March 2.4 °C 63 mm 58 %
April 7.8 °C 78 mm 59 %
May 13.0 °C 111 mm 66 %
June 16.9 °C 103 mm 72 %
July 20.7 °C 139 mm 77 %
August 22.6 °C 196 mm 74 %
September 20.2 °C 179 mm 66 %
October 14.4 °C 114 mm 55 %
November 7.3 °C 79 mm 55 %
December 0.8 °C 63 mm 60 %

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.