Monthly Climate
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Best time to visit Iwo

December is the best time to visit Iwo for general sightseeing, with average highs of 33 °C and about 1 wet days. The comfortable season runs roughly November to February.

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 December comfort 66/100
The least cloud December 46 % average cloud cover
The least rain December 6 mm
Warmth February 35 °C
Cooler weather August 27 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days
1 December 66 33 °C 1
2 November 66 31 °C 6
3 January 64 34 °C 2
4 February 60 35 °C 4
5 August 57 27 °C 23
6 July 56 28 °C 25
7 September 54 28 °C 25
8 June 52 29 °C 25
9 October 51 29 °C 22
10 March 50 34 °C 11
11 April 49 32 °C 15
12 May 46 30 °C 20

When to think twice

May scores lowest with about 20 wet days and highs near 30 °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 34.2 °C 9 mm 48 %
February 34.9 °C 20 mm 59 %
March 33.7 °C 51 mm 76 %
April 32.0 °C 76 mm 82 %
May 30.3 °C 120 mm 86 %
June 28.7 °C 148 mm 87 %
July 27.6 °C 161 mm 89 %
August 27.4 °C 165 mm 90 %
September 28.2 °C 176 mm 89 %
October 29.2 °C 129 mm 86 %
November 31.0 °C 25 mm 69 %
December 33.0 °C 6 mm 46 %

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.