The highest day temperature in September 2025 was 55°F. The lowest night temperature was 30°F. The average values for day and night temperatures during September were 42.5°F и 39.2°F respectivly.

The average sea surface temperature in September 2025 for Valdez was 52.2°F. The maximum and minimum values were 50.2°F and 55.4°F respectively.

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

Precipitation total in September for Valdez is 4.6 in. It makes september the most rainy month of the year.

The average wind speed in September is 4.2 mph.

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 Valdez in September is 2.9 hours.