Monthly Climate
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Best time to visit Moroni

August is the best time to visit Moroni for general sightseeing, with average highs of 27 °C and about 11 wet days. The comfortable season runs roughly June to October.

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 70/100
A beach holiday September sea 26 °C
The least cloud August 33 % average cloud cover
The least rain September 36 mm
Warmth December 31 °C
Cooler weather July 27 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 August 70 27 °C 11 83
2 September 70 28 °C 9 87
3 July 66 27 °C 14 76
4 October 64 30 °C 10 84
5 June 62 27 °C 15 75
6 November 54 30 °C 13 72
7 May 53 29 °C 17 71
8 April 44 30 °C 22 66
9 December 43 31 °C 22 66
10 January 43 30 °C 23 66
11 February 43 30 °C 21 66
12 March 43 30 °C 26 65

For a beach holiday

September scores highest, with a sea temperature of 26 °C and air temperatures around 28 °C. The sea never reaches 20 °C here.

Month Sea Air Sunshine Beach score
January 29 °C 30 °C 78 % 66
February 29 °C 30 °C 78 % 66
March 29 °C 30 °C 70 % 65
April 29 °C 30 °C 55 % 66
May 28 °C 29 °C 44 % 71
June 27 °C 27 °C 41 % 75
July 26 °C 27 °C 39 % 76
August 26 °C 27 °C 33 % 83
September 26 °C 28 °C 34 % 87
October 27 °C 30 °C 37 % 84
November 28 °C 30 °C 43 % 72
December 29 °C 31 °C 60 % 66

When to think twice

March scores lowest with about 26 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 30.2 °C 264 mm 78 %
February 30.2 °C 224 mm 78 %
March 30.2 °C 215 mm 70 %
April 29.9 °C 153 mm 55 %
May 28.8 °C 89 mm 44 %
June 27.4 °C 53 mm 41 %
July 26.7 °C 49 mm 39 %
August 27.1 °C 41 mm 33 %
September 28.3 °C 36 mm 34 %
October 29.5 °C 47 mm 37 %
November 30.4 °C 82 mm 43 %
December 30.5 °C 183 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.