The highest day temperature in January 2026 was 64°F. The lowest night temperature was 36°F. The average values for day and night temperatures during January were 54.6°F и 49.1°F respectivly.

The average sea surface temperature in January 2026 for Piraeus was 62.9°F. The maximum and minimum values were 60.4°F and 65.0°F respectively.

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

Precipitation total in January for Piraeus is 1.6 in. It makes january one of the most rainy months of the year.

The average wind speed in January is 9.0 mph. It makes January one of the most windy months of the year for Piraeus.

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 Piraeus in January is 6.3 hours.