The highest day temperature in July 2025 was 91°F. The lowest night temperature was 69°F. The average values for day and night temperatures during July were 85.2°F и 76.0°F respectivly.

The average sea surface temperature in July 2025 for Ostia was 81.9°F. The maximum and minimum values were 77.2°F and 86.8°F respectively.

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

Precipitation total in July for Ostia is 0.5 in. It makes july one of the least rainy months of the year.

The average wind speed in July is 8.2 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 Ostia in July is 13.5 hours.