Slovenia Climate – July 2026 Update
Top 5 Cities: Ljubljana, Maribor, Celje, Kranj, and Velenje
Summary
Slovenia has endured a sweltering stretch to start the summer, culminating in its 3rd warmest May-July period in 87 years of record-keeping. Persistent atmospheric heat trapped high temperatures across central Europe, straining local rivers and water reserves. The abnormal warmth is expected to linger across the region over the coming months.
This month in numbers
In July 2026, Slovenia recorded an average temperature of 21.49°C, which sits 2.9°C above the 1961-1990 baseline. That made it the 8th warmest such period in records dating back to 1940, remaining below the all-time high of 22.3°C set in July 2015. Worldwide, global land temperature for the month averaged 15.8°C, which was 1.6°C above baseline and ranked as the 3rd warmest July globally.
What changed
The recent conditions highlight a sharp seasonal warming trend across the country. Slovenia recorded a mean temperature of 18.91°C for the May-July 2026 period, marking a +2.7°C anomaly and placing it as the 3rd warmest such stretch on record behind only 2022. This fits a broader continental pattern where six of the top ten warmest three-month anomalies were concentrated among European countries. Globally, the May-July land average of 14.34°C was the 2nd warmest ever observed. In the longer term, Slovenia has warmed by 2.08°C above its historic baseline, following its warmest full year in 2024 at 11.51°C and an 8th-warmest 2025 at 10.86°C.
What’s driving change?
The elevated temperatures across Slovenia were influenced by powerful that locked intense heat over southern and central Europe. Because , interior European territory heats significantly faster than adjacent seas during high-pressure spells. Additionally, wavier allowed these pressure systems to stall, preventing cooler air masses from circulating through the region and compounding dry conditions.
Looking ahead
Long-range seasonal forecasting models indicate that temperatures across central and southern Europe are likely to remain above normal over the coming months.
Generated by Gemini from climate data and web sources
At a Glance
Temperature – Average
Climate Map – Global
Source: NOAA Climate at a Glance (countries & continents) · Met Office (UK) · US states & climate regions. Anomalies are vs the 1961–1990 baseline. See methodology.
Typical Climate – Slovenia
Köppen Cfb · TemperateSlovenia has a temperate climate (Köppen Cfb: Oceanic / temperate), with distinct warm summers and cool-to-cold winters. July is typically the warmest month, averaging 21.0°C, while January is the coldest at 0.8°C. Annual precipitation averages around 1412mm, spread fairly evenly across the year.
Monthly climate normals (2016–2025) - bar colour and height show average temperature, the shaded area shows average monthly rain, with snow (water-equivalent) shown separately.
Data: Our World in Data / NOAA (precipitation: GPCC (DWD); frost: World Bank CCKP).
Long-Term Trends
Combined Timeline – Slovenia
Right axis: everything else standardized to standard deviations (σ) from its own average, since mm/hours/days aren't directly comparable to °C or to each other.
Data: Our World in Data / NOAA (precipitation: GPCC (DWD); frost: World Bank CCKP).
Heatwave Days – Slovenia
Warm Spell Duration Index (WSDI) - the WMO/ETCCDI heatwave measure: days in a 6+ day run above the local 90th-percentile temperature for that time of year.
Data: World Bank Climate Change Knowledge Portal (ERA5-derived). Refreshed roughly 1-2x/year, ~7-8 months behind present.
Year-on-Year Trends
The 4byo Climate Helix – Slovenia
Data: Our World in Data / NOAA (precipitation: GPCC (DWD); frost: World Bank CCKP).
Monthly Temperature – Slovenia
Background lines show the last 40 years (plus the record year and its opposite, wherever they fall).
Data: Our World in Data / NOAA (precipitation: GPCC (DWD); frost: World Bank CCKP).
Records – Slovenia
Our World in Data / NOAA (precipitation: GPCC (DWD); frost: World Bank CCKP) - Anomalies vs 1901-2000 mean
Shifting Seasons
Warm / cold seasonsKöppen Dfb · ContinentalHow spring and autumn have shifted in Slovenia. Spring is defined as the date monthly temperatures first rise above the long-term annual mean (8.7°C, from 1940–1969); autumn is the date they fall back below it. Temperature swings 21.8°C peak-to-peak across the year - a classic four-seasons rhythm.
Baseline vs recent monthly temperature climatology. Biggest warming: Feb (+4.0°C).
Data: Our World in Data / NOAA (precipitation: GPCC (DWD); frost: World Bank CCKP).
Emissions & Energy
Explore
Explore Climate Data
Data Sources
Data Sources for Slovenia
Every figure on this page is sourced from official, openly published climate datasets. Anomalies are calculated against the 1961–1990 baseline (temperature) and 1991–2020 (rainfall, sunshine, frost) - see the Methodology & Sources page for the complete dataset list and update calendar.
Country-level temperature anomaly, sourced from Copernicus ERA5 and Hadley HadCRUT5.
Annual country and global CO₂ emissions, from the Global Carbon Project.
Monthly rainfall - Global Precipitation Climatology Centre (DWD) preferred, World Bank CCKP/CRU TS fallback where GPCC lacks direct coverage.
Frost Days and Heatwave Days (Warm Spell Duration Index), ERA5-derived. World Bank Climate Change Knowledge Portal.
Monthly snow water-equivalent, Global Precipitation Climatology Centre (DWD).
FAQs
FAQs
How is the climate in Slovenia changing?
Slovenia is warming in line with the rest of the world. The page above shows the latest monthly temperature anomaly versus the 1961-1990 baseline, the long-term annual trend, and the region's rank in the historical record. The headline panel also shows the long-term trend rate per decade and the warmest and coolest years on file.
What is the climate like in Slovenia?
Slovenia has a temperate climate (Köppen Cfb: Oceanic / temperate), with distinct warm summers and cool-to-cold winters. July is typically the warmest month, averaging 21.0°C, while January is the coldest at 0.8°C. Annual precipitation averages around 1412mm, spread fairly evenly across the year.
Where does the climate data for Slovenia come from?
Climate data for Slovenia comes from Our World in Data, sourcing Copernicus ERA5 and HadCRUT5 (national temperature anomaly) and the Global Carbon Project via Our World in Data (CO₂ emissions), refreshed every month, when the upstream temperature and rainfall data are refreshed.
What is the climate baseline used on this page?
Anomalies on this page are calculated against the 1961-1990 climatological baseline, which is the standard reference period used by the Met Office, NOAA, IPCC and most national climate services. Some panels also show the source-native 1901-2000 (NOAA) or 1991-2020 (WMO) baselines for verification. See Methodology & Sources for the full reference.
Which areas does the Slovenia climate data cover?
The Slovenia climate profile covers Ljubljana, Maribor, Celje, Kranj and surrounding areas. Temperature, rainfall and emissions data for Slovenia
How often is the Slovenia climate update refreshed?
The Slovenia climate update is refreshed monthly, typically a few days after the previous month closes and the upstream provider (Met Office HadUK-Grid, NOAA Climate at a Glance, Copernicus ERA5 or the Global Carbon Project) publishes its update. See the Climate Rankings for cross-region comparisons.
What counts as a Heatwave Day on the Slovenia climate page?
Heatwave Days use the Warm Spell Duration Index (WSDI) - the WMO/ETCCDI-standard heatwave measure: days that are part of a run of 6 or more consecutive days above the local 90th-percentile temperature for that calendar day. The 90th-percentile threshold varies by time of year (a hot day in January is judged differently to one in July) but is fixed to the 1961-1990 baseline for every year shown - it does not shift as the climate warms, which is why Heatwave Days trend upward over time.
Does the Slovenia climate page include frost and snow data?
Yes. Frost Days (days with a minimum temperature below 0°C, World Bank CCKP) and snow water-equivalent (GPCC) are shown alongside temperature and precipitation, each measured against the 1961-1990 baseline where a like-for-like historical comparison is available.