When to go · Koper
Koper, month by month
The best months for Koper: May, Jun, Sep, Oct. Months to avoid: Jul, Aug.
Month by month
- JanuaryMixedOutside the best window (May–Jun, Sep–early Oct). Across Slovenia: Ski season at Kranjska Gora and Vogel; Ljubljana foggy and quiet.9 °C / 3 °C, 8 rain days48 °F / 37 °F, 8 rain daysCrowds: Low
- FebruaryMixedOutside the best window (May–Jun, Sep–early Oct). Across Slovenia: Kurentovanje carnival in Ptuj; ski weeks.10 °C / 3 °C, 7 rain days50 °F / 37 °F, 7 rain daysCrowds: Low
- MarchMixedOutside the best window (May–Jun, Sep–early Oct). Across Slovenia: Thaw; high passes still closed.14 °C / 6 °C, 8 rain days57 °F / 43 °F, 8 rain daysCrowds: Low
- AprilGoodOutside the best window (May–Jun, Sep–early Oct). Across Slovenia: Spring in Ljubljana and the Karst; waterfalls full; Vršič may still be shut.18 °C / 9 °C, 10 rain days64 °F / 48 °F, 10 rain daysCrowds: Medium
- MayGreatInside Koper's best window: May–Jun, Sep–early Oct.23 °C / 13 °C, 10 rain days73 °F / 55 °F, 10 rain daysCrowds: Medium
- JuneGreatInside Koper's best window: May–Jun, Sep–early Oct.27 °C / 17 °C, 10 rain days81 °F / 63 °F, 10 rain daysCrowds: High
- JulyAvoidListed as a month to avoid: Jul–Aug (crowds, heat, port traffic).29 °C / 19 °C, 8 rain days84 °F / 66 °F, 8 rain daysCrowds: High
- AugustAvoidListed as a month to avoid: Jul–Aug (crowds, heat, port traffic).29 °C / 19 °C, 8 rain days84 °F / 66 °F, 8 rain daysCrowds: High
- SeptemberGreatInside Koper's best window: May–Jun, Sep–early Oct.25 °C / 16 °C, 9 rain days77 °F / 61 °F, 9 rain daysCrowds: Medium
- OctoberGreatInside Koper's best window: May–Jun, Sep–early Oct.20 °C / 12 °C, 10 rain days68 °F / 54 °F, 10 rain daysCrowds: Low
- NovemberMixedOutside the best window (May–Jun, Sep–early Oct). Across Slovenia: Wet and grey; St Martin's wine weekend (11 Nov).14 °C / 8 °C, 10 rain days57 °F / 46 °F, 10 rain daysCrowds: Low
- DecemberMixedOutside the best window (May–Jun, Sep–early Oct). Across Slovenia: Ljubljana's lights and markets; ski season opens.10 °C / 4 °C, 9 rain days50 °F / 39 °F, 9 rain daysCrowds: Medium · 1 festival or holiday