The highest day temperature in September 2025 was 68°F. The lowest night temperature was 46°F. The average values for day and night temperatures during September were 60.7°F и 53.6°F respectivly.

The average sea surface temperature in September 2025 for Auckland was 58.5°F. The maximum and minimum values were 57.0°F and 61.2°F respectively.

You can expect various weather conditions during September. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in September for Auckland is 3.5 in.

The average wind speed in September is 11.3 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 Auckland in September is 5.7 hours.