worldweather28°Cexceptionally warm
usually 19°C–26°C
warmer than 95% of similar days
night: exceptionally warm
rain: typical rainfall
wind: exceptionally strong
Weather in Slovenia - today, tomorrow and 14-day forecast
Right now temperatures across Slovenia range from 26° to 31°. Below: today's conditions city by city, a live weather map, the 14-day outlook and month-by-month climate to help you pick the best time to travel.
Country values are the median of forecasts from 10 cities; the range shows local differences. Methodology.
Weather in Slovenia's cities today
🌧️Koper
31°💧 0.1 mm
🌧️Ljubljana
29°💧 2 mm
🌧️Novo Mesto
29°💧 0.1 mm
🌧️Kranj
28°💧 6.3 mm
🌧️Ptuj
28°💧 3.8 mm
🌧️Celje
28°💧 2 mm
🌧️Šmartno pri Litiji
28°💧 0.7 mm
🌧️Velenje
27°💧 5.1 mm
🌧️Maribor
26°💧 4.7 mm
🌧️Predjama
26°💧 0.2 mm
Weather map - today's temperatures
Next days in Slovenia
today🌧️
28°💧 2 mm
Sun🌧️
26°💧 0.5 mm
Mon☀️
27°💧 0.6 mm
Tue☀️
28°💧 2.7 mm
Wed🌧️
26°💧 6.4 mm
Thu🌧️
15°💧 26 mm
Fri🌧️
17°💧 0.3 mm
Sat🌤️
23°💧 6 mm
Forecast vs 1991-2020 climate normal
NASA POWERHow does the current forecast compare with normal?
We compare the coming days with weather usually observed at this time of year.
Tuesday 8 Sept in Slovenia, the forecast high is 28°C. Typical daytime temperatures at this time of year range from 19°C to 25°C, so it will be exceptionally warm. It is warmer than 97% of similar days.
26°Cwarmer than usual
usually 19°C–25°C
warmer than 87% of similar days
night: exceptionally warm
rain: typical rainfall
wind: typical
27°Cwarmer than usual
usually 19°C–25°C
warmer than 89% of similar days
night: exceptionally warm
rain: typical rainfall
wind: exceptionally light
28°Cexceptionally warm
usually 19°C–25°C
warmer than 97% of similar days
night: exceptionally warm
rain: more rain than usual
wind: exceptionally light
26°Cwarmer than usual
usually 19°C–25°C
warmer than 87% of similar days
night: exceptionally warm
rain: more rain than usual
wind: exceptionally light
15°Cexceptionally cool
usually 18°C–25°C
cooler than 95% of similar days
night: warmer than usual
rain: exceptionally wet
wind: typical
17°Ccooler than usual
usually 18°C–25°C
cooler than 85% of similar days
night: exceptionally warm
rain: typical rainfall
wind: exceptionally light
How warm was this week in previous years?
Each bar shows the average daily high during the same 7-day period in each year.
cooler yearstypical rangewarmer years2026 forecastcurrent forecast
From 1981 to 2025, the 5-11 Sept period averaged 22°C by day. The coolest year was 1996 (17°C) and the warmest was 2008 (26°C). The current forecast averages 24°C - higher than in 80% of historical years.
Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.
Weather warnings - Slovenia
Thunderstormsyellow level
from 5 Sept, 15:00 to 9 Sept, 23:59 · 6 regions
Areas: Slovenia / South-West, Slovenia / Central, Slovenia / South-East, Slovenia / Sea, Slovenia / North-East, Slovenia / North-West
Lightning, wind gusts, hail and torrential rain possible. Avoid open spaces and tall trees.
Heatyellow level
from 5 Sept, 12:00 to 8 Sept, 21:59 · 4 regions
Areas: Slovenia / North-East, Slovenia / South-West, Slovenia / Central, Slovenia / South-East
High temperatures and risk of overheating. Drink plenty of water, avoid the midday sun and look after the elderly.
Source: national weather service via Meteoalarm (EUMETNET). Yellow - be aware, orange - be prepared, red - take action.
14-day forecast - Slovenia
Slovenia 30 & 45-day weather - long-range outlook
Next 16 days · forecast
23°
around 17° at night · days with rain: 9
Weeks 3-4 · avg for September
21°
around 11° at night · rain chance 47%
Weeks 5-7 · avg for October
16°
around 6° at night · rain chance 39%
The 30 & 45-day outlook for Slovenia: the next 16 days are a numerical forecast updated daily - on average 23° by day and 17° at night. Further out we rely on multi-year climate averages: around 21° in September, and about 16° in October. Forecasts beyond two weeks are indicative only.
Today vs the next days - Slovenia cities
| City | Today | +3 days | +7 days | Rain today |
|---|---|---|---|---|
| 🌧️ Koper | 31℃ | 32℃ | 26℃ | 0.1 mm |
| 🌧️ Ljubljana | 29℃ | 27℃ | 22℃ | 2 mm |
| 🌧️ Novo Mesto | 29℃ | 29℃ | 24℃ | 0.1 mm |
| 🌧️ Kranj | 28℃ | 30℃ | 22℃ | 6.3 mm |
| 🌧️ Ptuj | 28℃ | 28℃ | 23℃ | 3.8 mm |
| 🌧️ Celje | 28℃ | 29℃ | 23℃ | 2 mm |
| 🌧️ Šmartno pri Litiji | 28℃ | 28℃ | 23℃ | 0.7 mm |
| 🌧️ Velenje | 27℃ | 28℃ | 23℃ | 5.1 mm |
| 🌧️ Maribor | 26℃ | 28℃ | 23℃ | 4.7 mm |
| 🌧️ Predjama | 26℃ | 29℃ | 23℃ | 0.2 mm |
Day-by-day forecast for Slovenia
Saturday5 September 2026
🌧️28°moderate rain
Sunday6 September 2026
🌧️26°light rain
Monday7 September 2026
☀️27°clear sky
Tuesday8 September 2026
☀️28°clear sky
Wednesday9 September 2026
🌧️26°moderate rain
Thursday10 September 2026
🌧️15°light rain
Friday11 September 2026
🌧️17°light rain
Saturday12 September 2026
🌤️23°scattered clouds
Sunday13 September 2026
🌧️17°light rain
Monday14 September 2026
☁️19°broken clouds
Tuesday15 September 2026
☀️22°clear sky
Wednesday16 September 2026
☀️24°clear sky
Thursday17 September 2026
🌧️19°light rain
Friday18 September 2026
☁️24°broken clouds
Saturday19 September 2026
☀️26°clear sky
Sunday20 September 2026
☀️27°clear sky
Pollen in Slovenia - info for allergy sufferers
Today ragweed pollen is highest in Slovenia - about 22 grains/m³, moderate level. Most allergy sufferers should not feel strong symptoms. Pollen levels are a CAMS model forecast and are indicative.
Sea temperature - Slovenia
| Beach | Water today | Water week avg | Waves | How's the water? |
|---|---|---|---|---|
| Koper | 27℃ | 27℃ | 0.1 m | very warm |
Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.
Air quality and smog in Slovenia
| City | PM2.5 (µg/m³) | PM10 (µg/m³) | Air quality |
|---|---|---|---|
| Lublana | 11 | 14.7 | very good |
Based on PM2.5 thresholds. Station readings, updated daily (last reading: 2026-09-05, 03:00).
Slovenia weather through the year
Slovenia weather month by month - when is the best time to go?
Weather in other countries in Europe
Public holidays in Slovenia - when are the long weekends?
Next long weekend in Slovenia: Christmas Day (25 December, Friday) - Friday–Sunday (3 days off).
2026
31 OctoberSaturday
Reformation Day
falls on a weekend1 NovemberSunday
Day of the Dead
falls on a weekend25 DecemberFriday
Christmas Day
long weekend26 DecemberSaturday
Independence and Unity Day
falls on a weekend2027
1 JanuaryFriday
New Year's Day
long weekend2 JanuarySaturday
New Year's Day
falls on a weekend8 FebruaryMonday
Prešeren Day
long weekend28 MarchSunday
Easter Sunday
falls on a weekend29 MarchMonday
Easter Monday
long weekend27 AprilTuesday
Day of Uprising Against Occupation
long weekend + bridge day1 MaySaturday
Labour Day
falls on a weekend2 MaySunday
Labour Day
falls on a weekendPublic holidays (statutory days off) - shops, offices and some attractions may be closed. A "bridge day" is a workday between a holiday and the weekend worth taking as leave. Lunar holiday dates marked as tentative may shift by one day after the official announcement.
Calendar sources
FAQ - Slovenia weather
What is the weather like in Slovenia today?
Today it is about 28° during the day and 20° at night, moderate rain.
How far ahead can I check the forecast for Slovenia?
This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.