The highest day temperature in September 2023 was 86°F. The lowest night temperature was 59°F. The average values for day and night temperatures during September were 78.2°F и 66.4°F respectivly.

The average sea surface temperature in September 2023 for Monterosso was 78.5°F. The maximum and minimum values were 76.6°F and 82.2°F respectively.

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

Precipitation total in September for Monterosso is 2.3 in.

The average wind speed in September is 5.3 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 Monterosso in September is 9.6 hours.