The highest day temperature in January 2025 was 96°F. The lowest night temperature was 77°F. The average values for day and night temperatures during January were 90.1°F и 79.1°F respectivly.

The average sea surface temperature in January 2025 for Surabaya was 88.4°F. The maximum and minimum values were 87.2°F and 89.4°F respectively.

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

Precipitation total in January for Surabaya is 8.3 in. It makes january the most rainy month of the year.

The average wind speed in January is 6.9 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 Surabaya in January is 6.5 hours.