Mild
Average highs are around 21°C, so days are mild rather than hot.
May verdict
Portorož, Slovenia in May
Weather score49Mixed
Mixed for holiday weather
Average highs are around 21°C, so days are mild rather than hot. Sunshine averages 7.4h per day, enough for a balanced month. Rainfall averages 78mm, which is relatively low for holiday planning.
May weather
Monthly averages
Temp
21°C
Rain
78mm
Sun
7.4h
Sea
18°C
Weather score
49
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 78mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 7.4h per day, enough for a balanced month.
Cool sea
Sea temperatures average 18°C, so the water can feel cool.
Map
Weather map
Compare Portorož, Slovenia with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
May21°C average high
May is close to Portorož's yearly temperature average, giving a typical read on daytime heat.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
May78mm average rain
May sits on the drier side of Portorož's year, which helps with sightseeing and transfers.
Driest monthsJanuary to August, October, and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
May7.4 hours average sun
May is brighter than Portorož's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsJune to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
May18°C average sea
May is close to Portorož's yearly sea-temperature average, so swimming comfort is fairly typical.
Warmest seaJune to September
Sea temperatures are usually near 23°C in this stretch, so swimming comfort is at its strongest.
Weather score
May49 weather score
May sits close to Portorož's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
