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

Calama tops the list at 0.2 mm in October. Ranked from 1991–2020 climate normals across 50 destinations in South America.

Top three in October: Calama (0.2 mm) , Al Hufūf (0.4 mm) , Antofagasta (0.6 mm) . Between first and 50th place the rainfall differs by 16 mm.

# Destination Country Rainfall Avg high Avg low Rainfall Wet days Sunshine Sea temp
1 Calama Chile 0.2 mm 24 °C 5.1 °C 0 mm 0 385 h –
2 Al Hufūf Saudi Arabia 0.4 mm 36 °C 20 °C 0 mm 0 338 h –
3 Antofagasta Chile 0.6 mm 20 °C 14 °C 1 mm 0 379 h 16 °C
4 Dammam Saudi Arabia 0.8 mm 34 °C 24 °C 1 mm 0 339 h 30 °C
5 Riyadh Saudi Arabia 0.9 mm 34 °C 20 °C 1 mm 0 339 h –
6 Al Kharj Saudi Arabia 0.9 mm 35 °C 19 °C 1 mm 0 339 h –
7 Tabuk Saudi Arabia 1.0 mm 31 °C 15 °C 1 mm 0 336 h –
8 Al Jubayl Saudi Arabia 1.1 mm 35 °C 23 °C 1 mm 0 337 h 30 °C
9 Chincha Alta Peru 1.1 mm 23 °C 16 °C 1 mm 0 364 h 17 °C
10 Ica Peru 1.2 mm 27 °C 16 °C 1 mm 0 367 h –
11 Hafar Al-Batin Saudi Arabia 1.2 mm 35 °C 20 °C 1 mm 0 334 h –
12 Tacna Peru 1.2 mm 22 °C 13 °C 1 mm 0 360 h –
13 Yanbu Saudi Arabia 1.8 mm 34 °C 25 °C 2 mm 0 337 h 30 °C
14 Chimbote Peru 1.9 mm 21 °C 16 °C 2 mm 1 358 h 17 °C
15 Unaizah Saudi Arabia 2.3 mm 34 °C 19 °C 2 mm 0 337 h –
16 Madinah Saudi Arabia 2.4 mm 36 °C 20 °C 2 mm 0 336 h –
17 Mossoró Brazil 2.4 mm 35 °C 24 °C 2 mm 0 362 h –
18 Lima Peru 2.5 mm 22 °C 16 °C 2 mm 0 361 h 17 °C
19 Callao Peru 2.5 mm 21 °C 16 °C 2 mm 0 361 h 17 °C
20 Santa Anita - Los Ficus Peru 2.5 mm 20 °C 15 °C 2 mm 0 361 h 17 °C
21 Buraydah Saudi Arabia 2.6 mm 34 °C 19 °C 3 mm 0 337 h –
22 Chiclayo Peru 2.8 mm 23 °C 17 °C 3 mm 1 352 h 17 °C
23 Sullana Peru 2.8 mm 30 °C 18 °C 3 mm 1 352 h –
24 Iquique Chile 2.8 mm 23 °C 15 °C 3 mm 0 381 h 18 °C
25 Ha'il Saudi Arabia 3.0 mm 32 °C 18 °C 3 mm 1 332 h –
26 Jeddah Saudi Arabia 3.2 mm 33 °C 26 °C 3 mm 1 340 h 31 °C
27 Najrān Saudi Arabia 3.3 mm 30 °C 16 °C 3 mm 1 347 h –
28 Sobral Brazil 3.4 mm 36 °C 24 °C 3 mm 1 355 h –
29 Trujillo Peru 3.9 mm 23 °C 17 °C 4 mm 1 357 h 17 °C
30 Piura Peru 4.1 mm 29 °C 18 °C 4 mm 1 346 h –
31 Caucaia Brazil 4.3 mm 31 °C 25 °C 4 mm 1 359 h 27 °C
32 Coquimbo Chile 4.8 mm 20 °C 12 °C 5 mm 1 364 h 14 °C
33 La Serena Chile 4.9 mm 22 °C 13 °C 5 mm 1 364 h 14 °C
34 Arequipa Peru 5.4 mm 23 °C 11 °C 5 mm 1 373 h –
35 Parnaíba Brazil 5.8 mm 33 °C 25 °C 6 mm 1 356 h 27 °C
36 Fortaleza Brazil 6.1 mm 30 °C 25 °C 6 mm 2 360 h 27 °C
37 Khamis Mushait Saudi Arabia 6.7 mm 26 °C 15 °C 7 mm 1 347 h –
38 Makkah Saudi Arabia 7.3 mm 36 °C 23 °C 7 mm 3 339 h –
39 Ta’if Saudi Arabia 7.8 mm 29 °C 17 °C 8 mm 2 344 h –
40 Arica Chile 8.1 mm 20 °C 14 °C 8 mm 2 375 h 18 °C
41 Manta Ecuador 9.5 mm 28 °C 22 °C 9 mm 2 288 h 25 °C
42 Juazeiro do Norte Brazil 10 mm 34 °C 23 °C 10 mm 2 352 h –
43 Petrolina Brazil 13 mm 34 °C 22 °C 13 mm 1 350 h –
44 Viña del Mar Chile 14 mm 19 °C 11 °C 14 mm 2 372 h 13 °C
45 São Luís Brazil 14 mm 31 °C 26 °C 14 mm 3 362 h 28 °C
46 Valparaíso Chile 14 mm 15 °C 11 °C 14 mm 2 373 h 13 °C
47 Parnamirim Brazil 15 mm 29 °C 24 °C 15 mm 6 368 h 27 °C
48 Campina Grande Brazil 15 mm 29 °C 20 °C 15 mm 5 350 h –
49 Caxias Brazil 16 mm 36 °C 24 °C 16 mm 3 356 h –
50 Teresina Brazil 16 mm 37 °C 25 °C 16 mm 2 357 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

September: top 5

  1. Riyadh 0 mm
  2. Al Kharj 0.00 mm
  3. Dammam 0.02 mm
  4. Hafar Al-Batin 0.03 mm
  5. Yanbu 0.05 mm

Full ranking for September

November: top 5

  1. Calama 0.06 mm
  2. Antofagasta 0.5 mm
  3. La Serena 0.6 mm
  4. Coquimbo 0.6 mm
  5. Chincha Alta 0.8 mm

Full ranking for November

How this ranking is built

What is ranked
Total precipitation, in mm, in October, 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.