Where to Go for Great Weather
Slovenia · Month guide

Slovenia in December

Around 5 °C with 92 mm of rain and 2.9 hours of sun a day.

December is a challenging month for Slovenia overall; regional choices matter most. Around 5 °C with 92 mm of rain and 2.9 hours of sun a day. Use the regional grid below to find where this month works best — national averages hide the swings between coast, highlands, and inland.

Plan a trip in December← Slovenia year-round
Match verdictMatch: Avoid. Slovenia · December.
Avoid
Slovenia · December
What the weather usually does

Slovenia · typical month

  • Day / night
    -1 – 5 °C
    Year range -2 – 26 °C
  • Rainfall
    92 mm
    Year range 81 – 163 mm
  • Sunshine
    2.9 hr / day
    Year range 2.9 – 7.7 hr / day
Compare with another destination
What’s open · December

Things to do in Slovenia in December

December closes 1 thing below; the rest run as normal.

Opening seasons are checked by hand against the operators and parks themselves, not derived from the climate figures on this page. Last reviewed 2026-08-28. Dates move — confirm before you book.

193 regions · current month

Slovenia, taken apart

Safety · 4 governments

What the governments say about Slovenia

Combined advisory · most-cautious-wins
Exercise normal precautions
Highest level across 4 governments · Advisory last changed
See breakdown by country
AU

Exercise normal precautions

Changed Checked www.smartraveller.gov.au
DE

Exercise normal precautions

Changed Checked www.auswaertiges-amt.de
US

Exercise normal precautions

Changed Checked travel.state.gov
Climate at a glance · 10-year ERA5

A decade of weather, in one page

Temperature°C
Temperature · 12-month climatologySlovenia. Average daytime high by month in °C. Lowest in January (4.5), highest in July (26.4). Monthly means: 4.5, 7.6, 11.3, 15.5, 18.8, 24.8, 26.4, 26.2, 21.0, 16.0, 9.1, 5.2.
— daytime high— overnight low▬ typical range
View data table
MonthAverage daytime high (°C)Average overnight low (°C)Typical lowTypical high
January4.5-2.3-8.810.7
February7.6-0.3-7.513.4
March11.31.7-3.618.9
April15.55.1-1.422.9
May18.89.64.925.1
June24.814.610.430.9
July26.415.811.731.2
August26.215.610.931.7
September21.011.55.426.7
October16.07.42.021.7
November9.12.9-3.315.2
December5.2-0.8-5.610.1
Rainfallmm
Rainfall · 12-month climatologySlovenia. Rainfall by month in mm. Lowest in January (81), highest in May (163). Monthly means: 81, 83, 89, 96, 163, 111, 124, 120, 150, 113, 131, 92.
View data table
MonthRainfall (mm)
January81
February83
March89
April96
May163
June111
July124
August120
September150
October113
November131
December92
Sunshinehr / day
Sunshine · 12-month climatologySlovenia. Sunshine hours by month in hr / day. Lowest in December (2.9), highest in July (7.7). Monthly means: 3.5, 4.3, 5.9, 6.8, 6.1, 7.6, 7.7, 7.1, 5.6, 4.4, 3.0, 2.9.
View data table
MonthSunshine hours (hr / day)
January3.5
February4.3
March5.9
April6.8
May6.1
June7.6
July7.7
August7.1
September5.6
October4.4
November3.0
December2.9
Windkm/h
Wind · 12-month climatologySlovenia. Average wind speed by month in km/h. Lowest in July (5.7), highest in March (7.9). Monthly means: 7.3, 7.9, 7.9, 7.8, 6.9, 6.2, 5.7, 6.0, 6.5, 7.0, 7.0, 6.6.
— average▬ typical range
View data table
MonthAverage wind speed (km/h)Typical lowTypical high
January7.34.012.9
February7.94.214.7
March7.94.412.8
April7.84.813.1
May6.94.211.2
June6.23.99.8
July5.74.08.9
August6.04.19.7
September6.54.110.1
October7.04.012.1
November7.04.111.7
December6.64.011.4
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← Earlier
November

Around 9 °C with 131 mm of rain and 3.0 hours of sun a day.

Later →
January

Around 5 °C with 80 mm of rain and 3.5 hours of sun a day.

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