May weather forecast
Portorož, Slovenia

May serves as a prelude to the summer season in Portorož with daily temperatures soaring to a comfortable 21.8°C (71.2°F). It's a time of predominantly clear skies with increased daylight making it suitable for outdoor enthusiasts. Be prepared, however, for a significant rise in rainfall compared to the preceding months. The sunshine hours increase to an ample 8.2 hours, suggesting the approach of peak summer months.

Temperature

May's onset in Portorož brings a temperature rise, moving from a comfortable 16.8°C (62.2°F) in April to an agreeable 21.8°C (71.2°F). During May, the nighttime temperature in Portorož averages to a cool 11°C (51.8°F).

Humidity

In Portorož, the average relative humidity in May is 54%.

Rainfall

In May, in Portorož, the rain falls for 11 days. Throughout May, 69mm (2.72") of precipitation is accumulated. In Portorož, during the entire year, the rain falls for 113.1 days and collects up to 931mm (36.65") of precipitation.

Sea temperature

In Portorož, the average seawater temperature in May is 18°C (64.4°F).
Note: For the majority, swimming in water with a temperature of 18°C (64.4°F) is not enjoyable. The difficulty in managing breathing rises as the temperature decreases from 21°C (69.8°F) to 15°C (59°F).

Daylight

In Portorož, the average length of the day in May is 14h and 55min.
On the first day of May, sunrise is at 05:52 and sunset at 20:12. On the last day of the month, sunrise is at 05:20 and sunset at 20:46 CEST.

Sunshine

In May, the average sunshine in Portorož, Slovenia, is 8.2h.

UV index

In Portorož, the average daily maximum UV index in May is 7. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 7 during May translates into the following recommendations:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.