The highest day temperature in January 2025 was 88°F. The lowest night temperature was 76°F. The average values for day and night temperatures during January were 83.7°F и 78.3°F respectivly.

The average sea surface temperature in January 2025 for Unawatuna was 85.7°F. The maximum and minimum values were 85.2°F and 86.8°F respectively.

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

Precipitation total in January for Unawatuna is 2.9 in. It makes january one of the least rainy months of the year.

The average wind speed in January is 5.0 mph. It makes January the most windless month of the year for Unawatuna.

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 Unawatuna in January is 7.6 hours.