Monthly Climate
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Best time to visit Numazu

May is the best time to visit Numazu for general sightseeing, with average highs of 21 °C and about 12 wet days. The comfortable season runs roughly April to June. The sea stays above 20 °C from June to November.

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 July sea 24 °C
The least cloud December 41 % average cloud cover
The least rain December 83 mm
Warmth August 29 °C
Cooler weather January 9.4 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 May 84 21 °C 12 49
2 October 83 21 °C 13 62
3 November 77 17 °C 9 46
4 June 74 24 °C 16 63
5 April 74 17 °C 12 27
6 September 69 26 °C 15 74
7 July 61 28 °C 15 74
8 December 60 12 °C 8 30
9 August 57 29 °C 15 74
10 March 54 13 °C 13 8
11 February 49 10.0 °C 9 16
12 January 48 9.4 °C 8 21

For a beach holiday

July scores highest, with a sea temperature of 24 °C and air temperatures around 28 °C. The sea is above 20 °C from June to November.

Month Sea Air Sunshine Beach score
January 16 °C 9.4 °C 42 % 21
February 15 °C 10.0 °C 50 % 16
March 15 °C 13 °C 59 % 8
April 17 °C 17 °C 63 % 27
May 19 °C 21 °C 70 % 49
June 22 °C 24 °C 83 % 63
July 24 °C 28 °C 77 % 74
August 27 °C 29 °C 66 % 74
September 26 °C 26 °C 67 % 74
October 23 °C 21 °C 60 % 62
November 21 °C 17 °C 52 % 46
December 18 °C 12 °C 41 % 30

When to think twice

January scores lowest with about 8 wet days and highs near 9.4 °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 9.4 °C 93 mm 42 %
February 10.0 °C 110 mm 50 %
March 13.0 °C 179 mm 59 %
April 17.4 °C 178 mm 63 %
May 21.4 °C 191 mm 70 %
June 24.2 °C 262 mm 83 %
July 27.7 °C 248 mm 77 %
August 29.0 °C 162 mm 66 %
September 26.1 °C 242 mm 67 %
October 21.3 °C 238 mm 60 %
November 16.6 °C 133 mm 52 %
December 11.9 °C 83 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.