The highest day temperature in May 2025 was 83°F. The lowest night temperature was 41°F. The average values for day and night temperatures during May were 65.0°F и 49.1°F respectivly.

The average sea surface temperature in May 2025 for Cerkno was 64.7°F. The maximum and minimum values were 61.2°F and 67.4°F respectively.

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

Precipitation total in May for Cerkno is 9.2 in. It makes may the most rainy month of the year.

The average wind speed in May is 4.0 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 Cerkno in May is 7.3 hours.