The highest day temperature in September 2024 was 79°F. The lowest night temperature was 37°F. The average values for day and night temperatures during September were 64.8°F и 54.6°F respectivly.

The average sea surface temperature in September 2024 for Vantaa was 63.3°F. The maximum and minimum values were 61.0°F and 66.2°F respectively.

You can expect various weather conditions during September. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in September for Vantaa is 1.9 in. It makes september one of the most rainy months of the year.

The average wind speed in September is 8.3 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 Vantaa in September is 6.8 hours.