When to go · Koper
Koper in May
Great month. Inside Koper's best window: May–Jun, Sep–early Oct.
Key facts
- Verdict
- Great
- Temperature
- 23°C (73°F)73°F (23°C) / 13°C (55°F)55°F (13°C)
- average high / low
- Rain days
- 10
- Crowds
- Medium
- Slovenia overall
- Prices
- Medium
- Slovenia overall
Verdict
Inside Koper's best window: May–Jun, Sep–early Oct.
Is another month better than May?
No other month rates higher than May for Koper in this guide.
Weather in May
- KoperHighs around 23 °C (73 °F), lows around 13 °C (55 °F), rain on about 10 daysHighs around 73 °F (23 °C), lows around 55 °F (13 °C), rain on about 10 days
- Karst and coast, Slovenia · Piran, Izola, Koper, Lipicabest weather
Mediterranean; the bora wind blasts the Karst in winter; sea swimming June–September.
Crowds and prices
- Crowds · Slovenia overall
- Medium
- Prices · Slovenia overall
- Medium
Slovenia overall: Green valleys, cave visits without queues; high trails still snowy.
Compare two months
Weather, crowds and prices for any two months in Koper, side by side.
Verdict
May: Great
Jun: Great
Daytime high
May: 23 °C (73 °F)73 °F (23 °C)
Jun: 27 °C (81 °F)81 °F (27 °C)
Night low
May: 13 °C (55 °F)55 °F (13 °C)
Jun: 17 °C (63 °F)63 °F (17 °C)
Rain days
May: 10
Jun: 10
Crowds
May: Medium
Jun: High
Prices
May: Medium
Jun: Medium
Festivals listed
May: 0
Jun: 0
May: Inside Koper's best window: May–Jun, Sep–early Oct.
June: Inside Koper's best window: May–Jun, Sep–early Oct.
Koper: figures are long-term averages from this guide, not a forecast.
What to pack
- A rain jacket or umbrella and shoes that dry fast