The highest day temperature in June 2025 was 89°F. The lowest night temperature was 58°F. The average values for day and night temperatures during June were 78.0°F и 67.1°F respectivly.

The average sea surface temperature in June 2025 for Niteroi was 73.9°F. The maximum and minimum values were 72.6°F and 75.0°F respectively.

Most of the days in June are sunny but you can also expect cloudy and gloomy days.

Precipitation total in June for Niteroi is 0.6 in. It makes june one of the least rainy months of the year.

The average wind speed in June is 5.5 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 June is 7.1 hours.