Antofagasta Weather in September

With daytime temperatures of 20°C (68°F) and nighttime lows of 12°C (54°F), September in Antofagasta brings pleasant temperatures during the day. The perfect weather makes it an appealing time to visit.

Rainfall in Antofagasta in September

Past climate data indicates that roughly 0 days will see rain, totalling around 3.5 mm (0.1 in) for the month. On the rare occasion it rains, expect a brief, moderate shower rather than a heavy downpour.

Temperature in Antofagasta in September

Antofagasta in September has perfect weather. Days reach 20°C (68°F) and nights cool to 12°C (54°F). Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With lows of 12°C (54°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in Antofagasta in September

Enjoy a sunny month with about 222 hours of sunshine, the clear skies make Antofagasta even more beautiful.

Wind Speed in Antofagasta in September

September sees wind speeds averaging 2 m/s (4 knots). You'll typically experience pleasant light breezes that move leaves slightly and feel refreshing. As an average, expect variation from very calm days to periods with more apparent air movement.

Average water temperature in September

With water at 15°C (59°F), it's on the cooler side. Keen swimmers won't be put off, but those who prefer warm water may find it less enjoyable.

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For a detailed overview over the year and the best time to visit Chile, check out our Antofagasta's climate page.

Antofagasta Temperature in September

Min Temperature 12°C (54°F)  

Max Temperature 20°C (68°F)  

Water Temperature 15°C (59°F)  

Chance of Rain 1%  

Precipitation 3.5 mm (0.1 in)  

Rainy days 0 days  

Humidity 78%  

Windspeed 2 m/s (4 knots)  

Sunshine 222 hours  

Percentage Sunshine  

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Antofagasta typically stay consistent throughout September, with daily highs averaging around 20°C (68°F). Nights are cool, with lows around 13°C (55°F).

Average temperatures in September

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Historical weather for Antofagasta in September

Browse day-by-day weather records for Antofagasta spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

‹ 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 ›

‹ January February March April May June July August September October November December ›

Antofagasta historical weather extremes in September

Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Antofagasta.

• The warmest day in September was on September 11, 1983, with a maximum of 25°C (77°F).
• The lowest daytime temperature in September was 14°C (57°F), recorded on September 3, 2021.
• The lowest overnight temperature recorded in September was 8°C (46°F) (September 10, 2003).

What to Wear in Antofagasta in September

Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Dry conditions mean you won't need to worry about rain protection. The water temperature sits at about 15°C (59°F), which is too chilly for most people to enjoy swimming. Leave the swimsuit at home unless you love cold water. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Antofagasta in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling

10/10

Walking

10/10

Barbeque

9/10

Camping

10/10

Outdoor sports

10/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Chile, check out our Antofagasta's climate page.

More climate data for Antofagasta

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Antofagasta climate overview or explore weather in Chile.