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The warmest places in South America in September: ranked by average high temperature

Al Hufūf tops the list at 41 °C in September. Ranked from 1991–2020 climate normals across 50 destinations in South America.

Top three in September: Al Hufūf (41 °C) , Madinah (41 °C) , Hafar Al-Batin (40 °C) . Between first and 50th place the avg high differs by 10.0 °C.

# Destination Country Avg high Avg high Avg low Rainfall Wet days Sunshine Sea temp
1 Al Hufūf Saudi Arabia 41 °C 41 °C 24 °C 0 mm 0 338 h –
2 Madinah Saudi Arabia 41 °C 41 °C 25 °C 0 mm 0 342 h –
3 Hafar Al-Batin Saudi Arabia 40 °C 40 °C 24 °C 0 mm 0 352 h –
4 Al Kharj Saudi Arabia 40 °C 40 °C 24 °C 0 mm 0 346 h –
5 Buraydah Saudi Arabia 40 °C 40 °C 23 °C 0 mm 0 354 h –
6 Riyadh Saudi Arabia 39 °C 39 °C 24 °C 0 mm 0 348 h –
7 Unaizah Saudi Arabia 39 °C 39 °C 23 °C 0 mm 0 354 h –
8 Al Jubayl Saudi Arabia 39 °C 39 °C 26 °C 0 mm 0 338 h 32 °C
9 Makkah Saudi Arabia 39 °C 39 °C 26 °C 5 mm 1 337 h –
10 Dammam Saudi Arabia 38 °C 38 °C 27 °C 0 mm 0 337 h 32 °C
11 Ha'il Saudi Arabia 37 °C 37 °C 23 °C 0 mm 0 351 h –
12 Teresina Brazil 36 °C 36 °C 24 °C 4 mm 1 349 h –
13 Tabuk Saudi Arabia 36 °C 36 °C 19 °C 0 mm 0 342 h –
14 Caxias Brazil 36 °C 36 °C 24 °C 6 mm 1 351 h –
15 Yanbu Saudi Arabia 36 °C 36 °C 27 °C 0 mm 0 336 h 30 °C
16 Şabyā Saudi Arabia 36 °C 36 °C 29 °C 23 mm 4 330 h 32 °C
17 Sobral Brazil 35 °C 35 °C 24 °C 2 mm 0 342 h –
18 Palmas Brazil 35 °C 35 °C 24 °C 26 mm 4 344 h –
19 Mossoró Brazil 35 °C 35 °C 23 °C 1 mm 0 339 h –
20 Jeddah Saudi Arabia 35 °C 35 °C 27 °C 0 mm 0 336 h 31 °C
21 Imperatriz Brazil 35 °C 35 °C 24 °C 10 mm 2 353 h –
22 Coro Venezuela 34 °C 34 °C 25 °C 76 mm 12 325 h 28 °C
23 Najrān Saudi Arabia 34 °C 34 °C 20 °C 0 mm 0 350 h –
24 Rondonópolis Brazil 34 °C 34 °C 22 °C 42 mm 6 313 h –
25 Araguaína Brazil 34 °C 34 °C 23 °C 26 mm 4 346 h –
26 Cuiabá Brazil 34 °C 34 °C 23 °C 45 mm 7 320 h –
27 Várzea Grande Brazil 34 °C 34 °C 23 °C 41 mm 6 314 h –
28 Parnaíba Brazil 34 °C 34 °C 25 °C 2 mm 0 348 h 27 °C
29 Barreiras Brazil 34 °C 34 °C 21 °C 8 mm 1 342 h –
30 Marabá Brazil 34 °C 34 °C 24 °C 22 mm 4 346 h –
31 Sinop Brazil 34 °C 34 °C 22 °C 53 mm 8 320 h –
32 Parauapebas Brazil 33 °C 33 °C 23 °C 26 mm 5 341 h –
33 Juazeiro do Norte Brazil 33 °C 33 °C 21 °C 2 mm 0 335 h –
34 Ta’if Saudi Arabia 32 °C 32 °C 22 °C 12 mm 3 339 h –
35 Porto Velho Brazil 32 °C 32 °C 24 °C 102 mm 16 314 h –
36 Cúcuta Colombia 32 °C 32 °C 22 °C 61 mm 10 294 h –
37 Rio Branco Brazil 32 °C 32 °C 23 °C 77 mm 11 302 h –
38 Abaetetuba Brazil 32 °C 32 °C 25 °C 23 mm 5 351 h –
39 Petrolina Brazil 32 °C 32 °C 20 °C 1 mm 0 320 h –
40 Castanhal Brazil 32 °C 32 °C 23 °C 35 mm 8 353 h –
41 Ananindeua Brazil 32 °C 32 °C 24 °C 41 mm 9 353 h 29 °C
42 Goiânia Brazil 32 °C 32 °C 20 °C 29 mm 5 330 h –
43 Neiva Colombia 32 °C 32 °C 22 °C 59 mm 10 335 h –
44 Maracanaú Brazil 32 °C 32 °C 24 °C 5 mm 1 340 h 27 °C
45 Belém Brazil 32 °C 32 °C 24 °C 27 mm 7 352 h 29 °C
46 Maicao Colombia 32 °C 32 °C 25 °C 152 mm 20 307 h –
47 Aparecida de Goiânia Brazil 31 °C 31 °C 20 °C 29 mm 5 329 h –
48 Rio Verde Brazil 31 °C 31 °C 20 °C 51 mm 7 321 h –
49 Ciudad Guayana Venezuela 31 °C 31 °C 23 °C 113 mm 17 331 h –
50 Ciudad Bolívar Venezuela 31 °C 31 °C 24 °C 142 mm 19 328 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. Stanley 5.5 °C
  2. Puerto Montt 10 °C
  3. Temuco 12 °C
  4. La Paz 13 °C
  5. Talcahuano 13 °C

Full ranking for August

October: top 5

  1. Stanley 8.7 °C
  2. Puerto Montt 14 °C
  3. La Paz 14 °C
  4. Valparaíso 15 °C
  5. Temuco 16 °C

Full ranking for October

How this ranking is built

What is ranked
The average daily high temperature, in °C, 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 population.
Sources
ERA5 / ERA5-Land reanalysis via Open-Meteo; sea temperature from NOAA OISST v2.1. Measured values are reproduced unchanged; only the ordering 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.