The highest day temperature in January 2026 was 91°F. The lowest night temperature was 70°F. The average values for day and night temperatures during January were 84.0°F и 74.4°F respectivly.

The average sea surface temperature in January 2026 for Rio das Ostras was 77.0°F. The maximum and minimum values were 73.8°F and 80.8°F respectively.

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

Precipitation total in January for Rio das Ostras is 2.8 in. It makes january the most rainy month of the year.

The average wind speed in January is 7.9 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 Rio das Ostras in January is 6.4 hours.