When to go · Postojna
Postojna, month by month
Good months for Postojna: Apr, May, Jun, Sep, Oct.
Month by month
- JanuaryMixedOutside the best window (All year). Across Slovenia: Ski season at Kranjska Gora and Vogel; Ljubljana foggy and quiet.3 °C (37 °F) / -2 °C (28 °F), 12 rain days37 °F (3 °C) / 28 °F (-2 °C), 12 rain daysCrowds: Low
- FebruaryMixedOutside the best window (All year). Across Slovenia: Kurentovanje carnival in Ptuj; ski weeks.5 °C (41 °F) / 0 °C (32 °F), 10 rain days41 °F (5 °C) / 32 °F (0 °C), 10 rain daysCrowds: Low
- MarchMixedOutside the best window (All year). Across Slovenia: Thaw; high passes still closed.10 °C (50 °F) / 3 °C (37 °F), 9 rain days50 °F (10 °C) / 37 °F (3 °C), 9 rain daysCrowds: Low
- AprilGoodOutside the best window (All year). Across Slovenia: Spring in Ljubljana and the Karst; waterfalls full; Vršič may still be shut.15 °C (59 °F) / 7 °C (45 °F), 8 rain days59 °F (15 °C) / 45 °F (7 °C), 8 rain daysCrowds: Medium
- MayGoodOutside the best window (All year). Across Slovenia: Green valleys, cave visits without queues; high trails still snowy.20 °C (68 °F) / 12 °C (54 °F), 7 rain days68 °F (20 °C) / 54 °F (12 °C), 7 rain daysCrowds: Medium
- JuneGoodOutside the best window (All year). Across Slovenia: Excellent: long days, open passes, sea warming.24 °C (75 °F) / 16 °C (61 °F), 6 rain days75 °F (24 °C) / 61 °F (16 °C), 6 rain daysCrowds: High
- JulyMixedOutside the best window (All year). Across Slovenia: Bled and Vintgar packed; go at dawn; afternoon storms in the Alps.27 °C (81 °F) / 19 °C (66 °F), 5 rain days81 °F (27 °C) / 66 °F (19 °C), 5 rain daysCrowds: High
- AugustMixedOutside the best window (All year). Across Slovenia: Peak crowds and prices at Bled and Piran; Triglav huts full.27 °C (81 °F) / 19 °C (66 °F), 5 rain days81 °F (27 °C) / 66 °F (19 °C), 5 rain daysCrowds: High
- SeptemberGoodOutside the best window (All year). Across Slovenia: Best month: warm sea, clear mountains, fewer people.23 °C (73 °F) / 15 °C (59 °F), 7 rain days73 °F (23 °C) / 59 °F (15 °C), 7 rain daysCrowds: Medium
- OctoberGoodOutside the best window (All year). Across Slovenia: Autumn colours and harvest; heavy rain spells in the Soča valley.17 °C (63 °F) / 10 °C (50 °F), 9 rain days63 °F (17 °C) / 50 °F (10 °C), 9 rain daysCrowds: Low
- NovemberMixedOutside the best window (All year). Across Slovenia: Wet and grey; St Martin's wine weekend (11 Nov).10 °C (50 °F) / 4 °C (39 °F), 11 rain days50 °F (10 °C) / 39 °F (4 °C), 11 rain daysCrowds: Low
- DecemberMixedOutside the best window (All year). Across Slovenia: Ljubljana's lights and markets; ski season opens.5 °C (41 °F) / 0 °C (32 °F), 12 rain days41 °F (5 °C) / 32 °F (0 °C), 12 rain daysCrowds: Medium · 1 festival or holiday
Compare two months
Weather, crowds and prices for any two months in Postojna, side by side.
Verdict
Apr: Good
May: Good
Daytime high
Apr: 15 °C (59 °F)59 °F (15 °C)
May: 20 °C (68 °F)68 °F (20 °C)
Night low
Apr: 7 °C (45 °F)45 °F (7 °C)
May: 12 °C (54 °F)54 °F (12 °C)
Rain days
Apr: 8
May: 7 (better)
Crowds
Apr: Medium
May: Medium
Prices
Apr: Medium
May: Medium
Festivals listed
Apr: 0
May: 0
April: Outside the best window (All year). Across Slovenia: Spring in Ljubljana and the Karst; waterfalls full; Vršič may still be shut.
May: Outside the best window (All year). Across Slovenia: Green valleys, cave visits without queues; high trails still snowy.
Postojna: figures are long-term averages from this guide, not a forecast.