When to go · Postojna
Postojna in September
Good month. Outside the best window (All year). Across Slovenia: Best month: warm sea, clear mountains, fewer people.
Key facts
- Verdict
- Good
- Temperature
- 23°C (73°F)73°F (23°C) / 15°C (59°F)59°F (15°C)
- average high / low
- Rain days
- 7
- Crowds
- Medium
- Slovenia overall
- Prices
- Medium
- Slovenia overall
Verdict
Outside the best window (All year). Across Slovenia: Best month: warm sea, clear mountains, fewer people.
Is another month better than September?
No other month rates higher than September for Postojna in this guide.
Weather in September
- PostojnaHighs around 23 °C (73 °F), lows around 15 °C (59 °F), rain on about 7 daysHighs around 73 °F (23 °C), lows around 59 °F (15 °C), rain on about 7 days
Crowds and prices
- Crowds · Slovenia overall
- Medium
- Prices · Slovenia overall
- Medium
Slovenia overall: Best month: warm sea, clear mountains, fewer people.
Compare two months
Weather, crowds and prices for any two months in Postojna, side by side.
Verdict
Sep: Good
Apr: Good
Daytime high
Sep: 23 °C (73 °F)73 °F (23 °C)
Apr: 15 °C (59 °F)59 °F (15 °C)
Night low
Sep: 15 °C (59 °F)59 °F (15 °C)
Apr: 7 °C (45 °F)45 °F (7 °C)
Rain days
Sep: 7 (better)
Apr: 8
Crowds
Sep: Medium
Apr: Medium
Prices
Sep: Medium
Apr: Medium
Festivals listed
Sep: 0
Apr: 0
September: Outside the best window (All year). Across Slovenia: Best month: warm sea, clear mountains, fewer people.
April: Outside the best window (All year). Across Slovenia: Spring in Ljubljana and the Karst; waterfalls full; Vršič may still be shut.
Postojna: figures are long-term averages from this guide, not a forecast.
What to pack
Nothing unusual for the weather this month.