Chile
Chile in September
Where it is warm, dry and good for swimming in Chile in September — compared across the country’s main destinations.
Quick answers
- Where is it warmest in Chile in September?
- San Pedro de Atacama is the warmest of the 16 destinations compared, with highs of 22°C (72°F) in September; Punta Arenas is the coolest at 8°C (46°F).
- Can you swim in the sea in Chile in September?
- Hardly: even the warmest water, at Arica (17°C (63°F)), stays below 21 °C.
Warmest
22°
San Pedro de Atacama
Coolest
8°
Punta Arenas
Driest
0 mm
San Pedro de Atacama
Warmest sea
17°
Arica
Across Chile, September highs run from 8°C (46°F) (Punta Arenas) to 22°C (72°F) (San Pedro de Atacama). On average it is 2 °C (3 °F) warmer than August. Most destinations stay largely dry. Best bets this month: San Pedro de Atacama, Calama, and Rancagua.
Best places in Chile in September
97 
San Pedro de Atacama
Antofagasta · Chile
22° / 4° 0 mm Sep
95
Calama
Antofagasta · Chile
21° / 3° 0 mm Sep
89
Rancagua
O'Higgins Region · Chile
22° / 9° 43 mm Sep
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79
Santiago
Santiago Metropolitan · Chile
19° / 6° 31 mm Sep
83
Antofagasta
Antofagasta · Chile
18° / 13° 1 mm Sep
83
Iquique
Tarapacá · Chile
18° / 14° 0 mm Sep
92
Pozo Almonte
Tarapacá · Chile
21° / 9° 0 mm Sep
81
Arica
Arica y Parinacota Region · Chile
18° / 14° 0 mm Sep
Weather in September by city
| Place | Day | Night | Rain | Sea | Score |
|---|---|---|---|---|---|
| San Pedro de Atacama | 22° | 4° | 0 mm | — | 97 |
| Calama | 21° | 3° | 0 mm | — | 95 |
| Rancagua | 22° | 9° | 43 mm | — | 89 |
| Antofagasta | 18° | 13° | 1 mm | 15° | 83 |
| Iquique | 18° | 14° | 0 mm | 17° | 83 |
| Arica | 18° | 14° | 0 mm | 17° | 81 |
| Santiago | 19° | 6° | 31 mm | — | 79 |
| La Serena | 17° | 10° | 5 mm | 13° | 78 |
| Viña del Mar | 18° | 8° | 25 mm | — | 77 |
| Valparaíso | 18° | 9° | 25 mm | — | 75 |
| Talca | 17° | 6° | 64 mm | — | 71 |
| Concepción | 15° | 6° | 92 mm | 12° | 63 |
| Valdivia | 14° | 5° | 173 mm | — | 54 |
| Port Montt | 13° | 4° | 146 mm | — | 52 |
| Puerto Natales | 10° | 1° | 28 mm | — | 40 |
| Punta Arenas | 8° | 1° | 41 mm | 6° | 33 |
Festivals in Chile in September
- International Film Festival of Northern Chile Chilean film festival
Frequently asked questions
What is the weather like in Chile in September?
Average daytime highs range from 8° in Punta Arenas to 22° in San Pedro de Atacama.
Can you swim in Chile in September?
The sea is cool: the warmest water is around Arica at about 17°.