The highest day temperature in July 2025 was 77°F. The lowest night temperature was 62°F. The average values for day and night temperatures during July were 72.9°F и 68.5°F respectivly.

The average sea surface temperature in July 2025 for Terceira Island was 73.1°F. The maximum and minimum values were 70.4°F and 75.2°F respectively.

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

Precipitation total in July for Terceira Island is 1.0 in. It makes july the least rainy month of the year.

The average wind speed in July is 9.1 mph. It makes July the most windless month of the year for Terceira Island.

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 Terceira Island in July is 7.7 hours.