The highest day temperature in January 2025 was 41°F. The lowest night temperature was 3°F. The average values for day and night temperatures during January were 27.6°F и 24.1°F respectivly.

The average sea surface temperature in January 2025 for Sydney was 33.2°F. The maximum and minimum values were 30.2°F and 35.0°F respectively.

Most of the days in January are gloomy but you can also expect sunny days.

Precipitation total in January for Sydney is 2.2 in.

The average wind speed in January is 11.3 mph.

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 Sydney in January is 2.7 hours.