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The driest places in South America in September: ranked by rainfall

Riyadh tops the list at 0 mm in September. Ranked from 1991–2020 climate normals across 50 destinations in South America.

Top three in September: Riyadh (0 mm) , Al Kharj (0.00 mm) , Dammam (0.02 mm) . Between first and 50th place the rainfall differs by 14 mm.

# Destination Country Rainfall Avg high Avg low Rainfall Wet days Sunshine Sea temp
1 Riyadh Saudi Arabia 0 mm 39 °C 24 °C 0 mm 0 348 h –
2 Al Kharj Saudi Arabia 0.00 mm 40 °C 24 °C 0 mm 0 346 h –
3 Dammam Saudi Arabia 0.02 mm 38 °C 27 °C 0 mm 0 337 h 32 °C
4 Hafar Al-Batin Saudi Arabia 0.03 mm 40 °C 24 °C 0 mm 0 352 h –
5 Yanbu Saudi Arabia 0.05 mm 36 °C 27 °C 0 mm 0 336 h 30 °C
6 Unaizah Saudi Arabia 0.05 mm 39 °C 23 °C 0 mm 0 354 h –
7 Buraydah Saudi Arabia 0.05 mm 40 °C 23 °C 0 mm 0 354 h –
8 Tabuk Saudi Arabia 0.06 mm 36 °C 19 °C 0 mm 0 342 h –
9 Al Jubayl Saudi Arabia 0.08 mm 39 °C 26 °C 0 mm 0 338 h 32 °C
10 Jeddah Saudi Arabia 0.09 mm 35 °C 27 °C 0 mm 0 336 h 31 °C
11 Ica Peru 0.1 mm 27 °C 16 °C 0 mm 0 354 h –
12 Al Hufūf Saudi Arabia 0.1 mm 41 °C 24 °C 0 mm 0 338 h –
13 Ha'il Saudi Arabia 0.1 mm 37 °C 23 °C 0 mm 0 351 h –
14 Madinah Saudi Arabia 0.2 mm 41 °C 25 °C 0 mm 0 342 h –
15 Chincha Alta Peru 0.2 mm 22 °C 16 °C 0 mm 0 350 h 17 °C
16 Najrān Saudi Arabia 0.4 mm 34 °C 20 °C 0 mm 0 350 h –
17 Calama Chile 0.5 mm 23 °C 3.5 °C 0 mm 0 345 h –
18 Antofagasta Chile 0.8 mm 20 °C 13 °C 1 mm 0 340 h 15 °C
19 Chiclayo Peru 1.0 mm 23 °C 16 °C 1 mm 0 333 h 17 °C
20 Mossoró Brazil 1.1 mm 35 °C 23 °C 1 mm 0 339 h –
21 Chimbote Peru 1.4 mm 20 °C 15 °C 1 mm 0 343 h 17 °C
22 Petrolina Brazil 1.4 mm 32 °C 20 °C 1 mm 0 320 h –
23 Sullana Peru 1.4 mm 29 °C 17 °C 1 mm 0 336 h –
24 Parnaíba Brazil 1.5 mm 34 °C 25 °C 2 mm 0 348 h 27 °C
25 Sobral Brazil 1.5 mm 35 °C 24 °C 2 mm 0 342 h –
26 Lima Peru 1.6 mm 21 °C 15 °C 2 mm 0 349 h 17 °C
27 Callao Peru 1.6 mm 20 °C 15 °C 2 mm 0 349 h 17 °C
28 Santa Anita - Los Ficus Peru 1.8 mm 19 °C 14 °C 2 mm 0 348 h 17 °C
29 Piura Peru 1.9 mm 28 °C 17 °C 2 mm 1 331 h –
30 Trujillo Peru 2.2 mm 22 °C 17 °C 2 mm 0 344 h 17 °C
31 Juazeiro do Norte Brazil 2.2 mm 33 °C 21 °C 2 mm 0 335 h –
32 Tacna Peru 2.4 mm 20 °C 13 °C 2 mm 0 328 h –
33 Caucaia Brazil 2.8 mm 31 °C 24 °C 3 mm 1 341 h 27 °C
34 Arequipa Peru 3.2 mm 23 °C 9.1 °C 3 mm 1 347 h –
35 Teresina Brazil 3.8 mm 36 °C 24 °C 4 mm 1 349 h –
36 Makkah Saudi Arabia 4.6 mm 39 °C 26 °C 5 mm 1 337 h –
37 Maracanaú Brazil 4.7 mm 32 °C 24 °C 5 mm 1 340 h 27 °C
38 Iquique Chile 5.2 mm 22 °C 14 °C 5 mm 1 340 h 17 °C
39 Coquimbo Chile 5.5 mm 19 °C 11 °C 6 mm 1 311 h 13 °C
40 La Serena Chile 5.6 mm 20 °C 12 °C 6 mm 1 311 h 13 °C
41 Caxias Brazil 5.6 mm 36 °C 24 °C 6 mm 1 351 h –
42 Barreiras Brazil 7.8 mm 34 °C 21 °C 8 mm 1 342 h –
43 Manta Ecuador 8.4 mm 27 °C 21 °C 8 mm 2 275 h 24 °C
44 Imperatriz Brazil 10 mm 35 °C 24 °C 10 mm 2 353 h –
45 Montes Claros Brazil 11 mm 30 °C 18 °C 11 mm 2 336 h –
46 São José de Ribamar Brazil 12 mm 30 °C 26 °C 12 mm 3 354 h 28 °C
47 Ta’if Saudi Arabia 12 mm 32 °C 22 °C 12 mm 3 339 h –
48 Arica Chile 13 mm 18 °C 13 °C 13 mm 3 339 h 17 °C
49 São Luís Brazil 13 mm 31 °C 25 °C 13 mm 3 354 h 28 °C
50 Vitória da Conquista Brazil 14 mm 26 °C 16 °C 14 mm 4 306 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. Buraydah 0.01 mm
  2. Hafar Al-Batin 0.01 mm
  3. Al Kharj 0.01 mm
  4. Tabuk 0.02 mm
  5. Riyadh 0.02 mm

Full ranking for August

October: top 5

  1. Calama 0.2 mm
  2. Al Hufūf 0.4 mm
  3. Antofagasta 0.6 mm
  4. Dammam 0.8 mm
  5. Riyadh 0.9 mm

Full ranking for October

How this ranking is built

What is ranked
Total precipitation, in mm, in September, lowest 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 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.