Portorož Weather in May
What's the weather like in Portorož (Piran-Pirano) in May 2025?
The climate in Portorož during May can be summarized as mild and a little damp.
May is in the spring in Portorož and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a comfortable 21°C (70°F), whilst at night 11°C (53°F) is normal.
| Daytime temperature | 21.3°C 70.3°F |
|---|---|
| Nightly temperature | 11.4°C 52.5°F |
| Average temperature | 16.3°C 61.4°F |
| Daily sunshine | 8 hrs |
| Avg rainfall | 93 mm 3.7 ins |
| Rainy days | 14 days |
| Sea temperature | 18.1°C 64.5°F |
| Humidity | 69% |
| Windspeed | 6.5kph 4 mph |
On average May is the 5th driest month of the year in Portorož with around 93mm 3.7 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 14 days, although this may vary considerably.
On the flip side this corresponds to an average of 8 hours of sunshine per day.
May temperatures in Portorož
May rainfall
May hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Portorož in May 2025.
Other monthly averages
Portorož weather stats
| Hottest month: | July | 27.4°C 81.3°F |
|---|---|---|
| Driest month: | February | 77mm 3ins |
| Sunniest month: | July | 10.1hrs |
| Coldest month: | January | 7.3°C 45.1°F |
| Wettest month: | November | 123mm 4.8ins |
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