The highest day temperature in December 2024 was 94°F. The lowest night temperature was 71°F. The average values for day and night temperatures during December were 83.9°F и 76.2°F respectivly.

The average sea surface temperature in December 2024 for Niteroi was 79.7°F. The maximum and minimum values were 77.4°F and 82.4°F respectively.

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

Precipitation total in December for Niteroi is 2.6 in. It makes december the most rainy month of the year.

The average wind speed in December is 5.6 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 Niteroi in December is 5.8 hours.