Bosnia and Herzegovina Climate – June 2026 Update
Top 5 Cities: Sarajevo, Banja Luka, Tuzla, Zenica, and Mostar
This month in numbers
June 2026 was exceptionally warm for Bosnia and Herzegovina, ranking as the 1st warmest June in 86 years of records, with an average temperature of 21.47°C, a striking 4.8°C above the 1961–1990 baseline. Globally, June 2026 was the 3rd warmest June on record for land temperatures.
What changed
The April–June 2026 period saw Bosnia and Herzegovina record its 6th warmest temperature in 86 years, with an anomaly of +2.6°C compared to the 1961–1990 baseline. This places the country within a broader European trend, as 10 of the top 10 warmest countries for the latest month's anomaly were in Europe. Bosnia and Herzegovina itself ranked as the 4th warmest country globally for the June 2026 anomaly. The country's 12-month rolling anomaly also places it high, at 8th warmest globally.
What’s driving change?
Bosnia and Herzegovina experienced a significant heatwave at the end of June 2026, with temperatures in Mostar reaching 41°C on June 28th, the highest national reading for the month. This extreme heat, which prompted an orange heat warning from the Federal Hydrometeorological Institute (FHMZ) from June 27th to 30th, also led to wildfires near Trebinje and at a Mostar landfill. This heatwave was part of a larger pattern affecting central, eastern, and southern Europe, driven by a heat dome and atmospheric shifts linked to a developing ENSO phase. The effect likely intensified the heat, as parched ground cannot cool itself through evaporation, further heating the air.
Looking ahead
The coming months, particularly July and August, are typically the hottest in Bosnia and Herzegovina, with average daily temperatures ranging from 26°C to 31°C.
Sources:
Generated by Gemini from climate data and web sources
At a Glance
Temperature – Average
Year-on-Year Trends
The 4byo Climate Helix – Bosnia and Herzegovina
Data: Our World in Data / NOAA (rainfall: World Bank CCKP / CRU TS 4.08). Baseline: first 30 yrs on record. Recent: last 10 yrs on record.
Bosnia and Herzegovina – Monthly Temperature – All Years
Data: Our World in Data / NOAA (rainfall: World Bank CCKP / CRU TS 4.08). Baseline: first 30 yrs on record. Recent: last 10 yrs on record.
Records – Bosnia and Herzegovina
Our World in Data / NOAA - Anomalies vs 1901-2000 mean
Shifting Seasons
Warm / cold seasonsKöppen Dfb · ContinentalHow spring and autumn have shifted in Bosnia and Herzegovina. Spring is defined as the date monthly temperatures first rise above the long-term annual mean (8.9°C, from 1940–1969); autumn is the date they fall back below it. Temperature swings 21.9°C peak-to-peak across the year - a classic four-seasons rhythm.
Baseline vs recent monthly temperature climatology. Biggest warming: Feb (+4.5°C).
Data: Our World in Data / NOAA (rainfall: World Bank CCKP / CRU TS 4.08). Baseline: first 30 yrs on record. Recent: last 10 yrs on record.
Rainfall & Precipitation
Rainfall & Rain Days – Totals
Headline: anomaly vs the 1961–1990 mean. Small figure: the actual value. Rank: position in the full record (1st = highest ever). Record: highest (or lowest) value on record with its year.
Emissions & Energy
Explore
Explore Climate Data
Data Sources
Data Sources for Bosnia and Herzegovina
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.
FAQs
FAQs
How is the climate in Bosnia and Herzegovina changing?
Bosnia and Herzegovina 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.
Where does the climate data for Bosnia and Herzegovina come from?
Climate data for Bosnia and Herzegovina 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 Bosnia and Herzegovina climate data cover?
The Bosnia and Herzegovina climate profile covers Sarajevo, Banja Luka, Tuzla, Zenica and surrounding areas. Temperature, rainfall and emissions data for Bosnia and Herzegovina
How often is the Bosnia and Herzegovina climate update refreshed?
The Bosnia and Herzegovina 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.