The highest day temperature in October 2023 was 59°F. The lowest night temperature was 26°F. The average values for day and night temperatures during October were 43.7°F и 40.0°F respectivly.

The average sea surface temperature in October 2023 for Helsinki was 51.3°F. The maximum and minimum values were 45.8°F and 59.4°F respectively.

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

Precipitation total in October for Helsinki is 2.3 in. It makes october one of the most rainy months of the year.

The average wind speed in October is 11.6 mph. It makes October one of the most windy months of the year for Helsinki.

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 Helsinki in October is 4.2 hours.