The highest day temperature in September 2025 was 67°F. The lowest night temperature was 52°F. The average values for day and night temperatures during September were 62.6°F и 54.5°F respectivly.

The average sea surface temperature in September 2025 for Antofagasta was 61.1°F. The maximum and minimum values were 60.2°F and 62.4°F respectively.

Almost all days in September are sunny. There is very low probability of clouds or gloomy days.

Precipitation total in September for Antofagasta is 0.0 in. This value is relatively stable throughout the year.

The average wind speed in September is 7.8 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Antofagasta in September is 11.3 hours.