Slovenia · September
Low seasonSlovenia · Europe
Climate Overview
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ø day, range from coolest to warmest dayØ dayrange | 5° (41°)-3– (27–)12 (54) | 7° (45°)-1– (30–)15 (59) | 12° (54°)3– (37–)21 (70) | 17° (63°)7– (45–)25 (77) | 21° (70°)12– (54–)29 (84) | 26° (79°)17– (63–)33 (91) | 28° (82°)19– (66–)34 (93) | 28° (82°)19– (66–)34 (93) | 22° (72°)13– (55–)30 (86) | 17° (63°)8– (46–)23 (73) | 10° (50°)2– (36–)18 (64) | 5° (41°)-2– (28–)13 (55) |
Ø night, range from coldest to warmest nightØ nightrange | -3° (27°)-10– (14–)5 (41) | -1° (30°)-9– (16–)5 (41) | 1° (34°)-6– (21–)8 (46) | 5° (41°)-2– (28–)12 (54) | 10° (50°)4– (39–)15 (59) | 14° (57°)9– (48–)19 (66) | 16° (61°)10– (50–)20 (68) | 15° (59°)8– (46–)20 (68) | 11° (52°)4– (39–)17 (63) | 7° (45°)-1– (30–)14 (57) | 3° (37°)-4– (25–)10 (50) | -1° (30°)-8– (18–)5 (41) |
☀️Sunshine | 2h UV 2 | 3h UV 3 | 6h UV 5 | 7h UV 7 | 7h UV 7 | 8h UV 8 | 8h UV 8 | 8h UV 7 | 6h UV 6 | 4h UV 4 | 2h UV 2 | 2h UV 2 |
🌧Rain Days | 6d70mm (2.8") | 7d84mm (3.3") | 6d81mm (3.2") | 7d89mm (3.5") | 9d122mm (4.8") | 8d104mm (4.1") | 8d110mm (4.3") | 7d127mm (5.0") | 8d176mm (6.9") | 6d107mm (4.2") | 8d121mm (4.8") | 7d105mm (4.1") |
Best travel time current monthØ = average · small figures = range: coolest–warmest day / coldest–warmest nightClimate data 2005–2025 · Source: ERA5 + station data
Off-season — lowest travel prices with still acceptable climate.
September in Slovenia offers acceptable conditions — but it's not among the top travel months. Those looking for ideal weather should visit in June and July.
Daytime highs average 22°C (72°F), cooling to 11°C (52°F) at night (daily average: 16°C (61°F)). Peaks reach around 30°C (86°F), the coldest nights around 4°C (39°F). With 6 sunshine hours per day and 8 rain days (176 mm (6.9 in)), this is one of the cloudier months.
A jacket for cool evenings should not be left behind. Sightseeing and excursions can be enjoyed comfortably at this time of year.
September can be wet, yet it stays mild in between and the grape harvest begins. In October the country turns colourful and mushroom and chestnut season starts. In November the sun sits low and fog lies over the Ljubljana basin.
Events & Festivals
- Kravji bal (Cow Ball)a Sunday in the second half of September
Festival marking the cattle drive in Ukanc on Lake Bohinj: herders bring the decorated cattle down from the high pastures, with folk music and regional food.
Packing list for Slovenia in September
- Long-sleeved shirts and light trousers
- Light jacket
- Sunscreen
- Sunglasses
- Light umbrella or rain poncho
- Travel first-aid kit
Frequently Asked Questions
- Is September a good time to visit Slovenia?
- September is not an optimal month for Slovenia (Score: 54/100), but it is manageable. For better conditions, consider June and July.
- How warm is it in Slovenia in September?
- In September, Slovenia sees daily highs of 22°C (72°F). Nights cool to 11°C (52°F), with a daily average of 16°C (61°F). Peaks reach around 30°C (86°F), the coldest nights around 4°C (39°F).
- How much rain falls in Slovenia in September?
- In September, Slovenia receives an average of 176 mm (6.9 in) of rain over 8 rain days. An umbrella may occasionally be needed.
- How many sunshine hours does Slovenia get in September?
- Slovenia averages 6 sunshine hours per day in September — above the annual average.
