Slovenia · December
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
Deep off-season — very low prices, but weather conditions are suboptimal.
December is the coldest winter month in Slovenia — with highs of only 5°C (41°F), it holds little appeal for sun-seekers. Better travel in June and July.
Temperatures reach a maximum of 5°C (41°F) during the day and drop to -1°C (30°F) at night — warm layers recommended. Peaks reach around 13°C (55°F), the coldest nights around -8°C (18°F) — frost does occur. With 2 sunshine hours per day and 7 rain days (105 mm (4.1 in)), this is one of the cloudier months.
Pack warm clothing and sturdy footwear. Cool temperatures make hiking and cultural trips enjoyable — beaches are off the agenda.
Slovenia in winter is grey but cosy: Ljubljana glows in Advent, the cafés along the river are full and snow lies in the Alpine valleys. Sunshine is rare, but prices are low and the sights are empty.
Packing list for Slovenia in December
- Winter coat
- Thermal clothing and warm layers
- Hat, scarf and gloves
- Warm, waterproof shoes
- Light umbrella or rain poncho
- Travel first-aid kit
Frequently Asked Questions
- Is December a good time to visit Slovenia?
- No — December is not among the recommended months for Slovenia (Score: 17/100). Climate conditions are unfavourable. For better conditions, consider June and July.
- How warm is it in Slovenia in December?
- In December, Slovenia sees daily highs of 5°C (41°F). Nights cool to -1°C (30°F), with a daily average of 2°C (36°F). Peaks reach around 13°C (55°F), the coldest nights around -8°C (18°F) — frost does occur.
- How much rain falls in Slovenia in December?
- In December, Slovenia receives an average of 105 mm (4.1 in) of rain over 7 rain days. An umbrella may occasionally be needed.
- How many sunshine hours does Slovenia get in December?
- Slovenia averages 2 sunshine hours per day in December — below the annual average.