The highest day temperature in January 2026 was 55°F. The lowest night temperature was 32°F. The average values for day and night temperatures during January were 48.1°F и 43.3°F respectivly.

The average sea surface temperature in January 2026 for Grottammare was 49.5°F. The maximum and minimum values were 45.8°F and 53.4°F respectively.

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

Precipitation total in January for Grottammare is 0.6 in.

The average wind speed in January is 7.1 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 Grottammare in January is 5.2 hours.