The highest day temperature in July 2025 was 98°F. The lowest night temperature was 65°F. The average values for day and night temperatures during July were 87.2°F и 72.5°F respectivly.

The average sea surface temperature in July 2025 for Islantilla was 74.6°F. The maximum and minimum values were 64.4°F and 81.8°F respectively.

Almost all days in July are sunny. There is very low probability of clouds or gloomy days.

Precipitation total in July for Islantilla is 0.0 in. It makes july the least rainy month of the year.

The average wind speed in July is 9.1 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 Islantilla in July is 13.9 hours.