Monthly Climate
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Best time to visit Merlo

April is the best time to visit Merlo for general sightseeing, with average highs of 22 °C and about 8 wet days. The comfortable season runs roughly March to May.

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 April comfort 90/100
The least cloud January 40 % average cloud cover
The least rain June 58 mm
Warmth January 29 °C
Cooler weather July 14 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days
1 April 90 22 °C 8
2 November 88 25 °C 8
3 October 87 21 °C 9
4 March 87 26 °C 7
5 May 83 18 °C 6
6 September 83 19 °C 7
7 December 80 28 °C 8
8 February 80 28 °C 8
9 August 77 17 °C 6
10 January 76 29 °C 7
11 June 71 15 °C 6
12 July 67 14 °C 6

When to think twice

July scores lowest with about 6 wet days and highs near 14 °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 29.1 °C 93 mm 40 %
February 27.7 °C 93 mm 41 %
March 25.7 °C 90 mm 43 %
April 21.8 °C 94 mm 48 %
May 18.0 °C 66 mm 55 %
June 15.0 °C 58 mm 55 %
July 14.2 °C 61 mm 54 %
August 16.7 °C 61 mm 51 %
September 18.5 °C 71 mm 51 %
October 21.3 °C 111 mm 53 %
November 24.7 °C 92 mm 45 %
December 27.9 °C 88 mm 40 %

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.