The highest day temperature in January 2026 was 73°F. The lowest night temperature was 54°F. The average values for day and night temperatures during January were 68.9°F и 63.6°F respectivly.

The average sea surface temperature in January 2026 for Cat Ba Island was 69.7°F. The maximum and minimum values were 67.0°F and 72.6°F respectively.

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

Precipitation total in January for Cat Ba Island is 0.9 in. It makes january one of the least rainy months of the year.

The average wind speed in January is 9.7 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 Cat Ba Island in January is 4.5 hours.