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Places with the best weather in South America in September: ranked by comfort score

La Rioja tops the list at 98 /100 in September. Ranked from 1991–2020 climate normals across 50 destinations in South America.

Top three in September: La Rioja (98 /100) , Catamarca (97 /100) , Chincha Alta (97 /100) . Between first and 50th place the comfort differs by 12 /100.

# Destination Country Comfort Avg high Avg low Rainfall Wet days Sunshine Sea temp
1 La Rioja Argentina 98 /100 23 °C 11 °C 23 mm 3 314 h –
2 Catamarca Argentina 97 /100 24 °C 13 °C 32 mm 5 318 h –
3 Chincha Alta Peru 97 /100 22 °C 16 °C 0 mm 0 350 h 17 °C
4 Quillacollo Bolivia 97 /100 23 °C 10 °C 22 mm 5 333 h –
5 Cochabamba Bolivia 96 /100 22 °C 9.8 °C 22 mm 5 333 h –
6 Arequipa Peru 94 /100 23 °C 9.1 °C 3 mm 1 347 h –
7 Córdoba Argentina 94 /100 21 °C 9.3 °C 36 mm 5 304 h –
8 Lima Peru 94 /100 21 °C 15 °C 2 mm 0 349 h 17 °C
9 San Luis Argentina 94 /100 22 °C 9.6 °C 30 mm 4 306 h –
10 Santa Fe Argentina 94 /100 21 °C 12 °C 66 mm 6 288 h –
11 Trujillo Peru 93 /100 22 °C 17 °C 2 mm 0 344 h 17 °C
12 La Serena Chile 93 /100 20 °C 12 °C 6 mm 1 311 h 13 °C
13 Iquique Chile 93 /100 22 °C 14 °C 5 mm 1 340 h 17 °C
14 Río Cuarto Argentina 93 /100 20 °C 9.3 °C 39 mm 5 292 h –
15 Paraná Argentina 93 /100 21 °C 11 °C 64 mm 6 287 h –
16 San Miguel de Tucumán Argentina 93 /100 24 °C 11 °C 77 mm 8 303 h –
17 Tacna Peru 92 /100 20 °C 13 °C 2 mm 0 328 h –
18 Loja Ecuador 92 /100 22 °C 14 °C 38 mm 8 335 h –
19 Chiclayo Peru 92 /100 23 °C 16 °C 1 mm 0 333 h 17 °C
20 Antofagasta Chile 92 /100 20 °C 13 °C 1 mm 0 340 h 15 °C
21 Rosario Argentina 92 /100 21 °C 10 °C 63 mm 6 287 h –
22 Ica Peru 92 /100 27 °C 16 °C 0 mm 0 354 h –
23 Callao Peru 91 /100 20 °C 15 °C 2 mm 0 349 h 17 °C
24 Santa Anita - Los Ficus Peru 91 /100 19 °C 14 °C 2 mm 0 348 h 17 °C
25 Vitória da Conquista Brazil 91 /100 26 °C 16 °C 14 mm 4 306 h –
26 Huánuco Peru 90 /100 23 °C 14 °C 34 mm 9 337 h –
27 Contagem Brazil 90 /100 26 °C 15 °C 47 mm 6 320 h –
28 Chimbote Peru 90 /100 20 °C 15 °C 1 mm 0 343 h 17 °C
29 Tarija Bolivia 90 /100 22 °C 8.7 °C 31 mm 8 318 h –
30 Poços de Caldas Brazil 90 /100 25 °C 14 °C 91 mm 10 318 h –
31 Coquimbo Chile 89 /100 19 °C 11 °C 6 mm 1 311 h 13 °C
32 Belo Horizonte Brazil 89 /100 27 °C 15 °C 48 mm 6 320 h –
33 Ribeirão das Neves Brazil 89 /100 27 °C 16 °C 41 mm 5 326 h –
34 Santiago del Estero Argentina 89 /100 27 °C 15 °C 27 mm 3 296 h –
35 Resistencia Argentina 88 /100 25 °C 15 °C 103 mm 8 274 h –
36 Santa Luzia Brazil 88 /100 28 °C 16 °C 39 mm 5 323 h –
37 Corrientes Argentina 88 /100 24 °C 15 °C 113 mm 8 272 h –
38 Salta Argentina 88 /100 21 °C 9.9 °C 76 mm 10 322 h –
39 Pouso Alegre Brazil 88 /100 26 °C 15 °C 87 mm 9 301 h –
40 Juiz de Fora Brazil 88 /100 25 °C 15 °C 75 mm 9 257 h –
41 Bragança Paulista Brazil 87 /100 25 °C 15 °C 81 mm 9 298 h –
42 Bogotá Colombia 87 /100 20 °C 11 °C 30 mm 9 320 h –
43 Ituzaingó Argentina 87 /100 24 °C 15 °C 140 mm 9 264 h –
44 Sete Lagoas Brazil 86 /100 28 °C 17 °C 45 mm 6 330 h –
45 Sucre Bolivia 86 /100 20 °C 7.9 °C 40 mm 8 321 h –
46 Francisco Morato Brazil 86 /100 25 °C 14 °C 90 mm 9 289 h –
47 Cotia Brazil 86 /100 24 °C 14 °C 85 mm 9 277 h –
48 Ponta Grossa Brazil 86 /100 22 °C 12 °C 131 mm 10 249 h –
49 Arica Chile 86 /100 18 °C 13 °C 13 mm 3 339 h 17 °C
50 Itapetininga Brazil 86 /100 25 °C 15 °C 90 mm 9 276 h –

Monthly values for the month named in the ranking; only destinations with a published climate page are ranked. Download this ranking as CSV.

The same ranking one month earlier and later

August: top 5

  1. Chincha Alta 98 /100
  2. Poços de Caldas 97 /100
  3. Pouso Alegre 97 /100
  4. Contagem 96 /100
  5. Santiago del Estero 96 /100

Full ranking for August

October: top 5

  1. Arequipa 97 /100
  2. La Serena 96 /100
  3. Chincha Alta 95 /100
  4. Abha 95 /100
  5. Tacna 94 /100

Full ranking for October

How this ranking is built

What is ranked
Our 0–100 comfort score for sightseeing weather (formula on the methodology page), in September, highest first.
Period
1991–2020 climate normals: the same 30 years for every destination, so the list compares like with like.
Who is included
50 destinations in South America with a published climate page. Neighbouring places that share a climate series are shown once.
Ties
Equal values are ordered by fewest wet days.
Sources
ERA5 / ERA5-Land reanalysis via Open-Meteo; sea temperature from NOAA OISST v2.1. Measured values are reproduced unchanged; only the ordering and the score is ours.

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: ranking order, beach and comfort scores. 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.