Luxembourg Climate – June 2026 Update
Top 5 Cities: Luxembourg City, Esch-sur-Alzette, Differdange, Dudelange, and Ettelbruck
This month in numbers
Luxembourg experienced its 4th warmest June on record, with an average temperature of 18.68°C, a significant 3.7°C above the 1961–1990 baseline. This follows a trend of unusually warm conditions, as the April–June 2026 period also ranked as the 4th warmest on record, with an average of 14.22°C, 2.7°C above the baseline. Globally, June 2026 was the 3rd warmest June for land temperatures, and the April–June period was the 2nd warmest on record for global land temperatures.
What changed
Luxembourg's consistently high temperatures this past month place it 19th out of 234 regions for its one-month temperature anomaly, highlighting a widespread warming trend across Europe, with 10 of the top 10 warmest one-month anomalies being European countries. The country's average temperature for 2025 was 10.63°C, making it the 5th warmest year on record. The long-term trend for Luxembourg shows a warming of +1.75°C compared to the 1961–1990 baseline.
What’s driving change?
A significant heatwave impacted Luxembourg in June 2026, leading to a red heat warning issued by MeteoLux from June 25th to June 27th. This heatwave saw maximum temperatures reach an all-time June record of 38.2°C on June 26th. The latter part of June was particularly severe, with average temperatures climbing to 26.7°C between June 21st and 30th, a deviation of 9°C from usual values, and eleven consecutive days with maximums exceeding 30°C. This extreme heat, combined with a rainfall deficit, points to the influence of seasonal shifts and potentially the effect in more populated areas. The developing El Niño event is also expected to influence global temperature patterns and increase the risk of heatwaves.
Looking ahead
Seasonal forecasts suggest a continued dominance of above-normal temperatures across nearly all parts of the globe for the June-July-August season, influenced by the strengthening El Niño.
Sources:
Generated by Gemini from climate data and web sources
At a Glance
Temperature – Average
Year-on-Year Trends
The 4byo Climate Helix – Luxembourg
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.
Luxembourg – 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 – Luxembourg
Our World in Data / NOAA - Anomalies vs 1901-2000 mean
Shifting Seasons
Warm / cold seasonsKöppen Dfb · ContinentalHow spring and autumn have shifted in Luxembourg. Spring is defined as the date monthly temperatures first rise above the long-term annual mean (8.4°C, from 1940–1969); autumn is the date they fall back below it. Temperature swings 17.1°C peak-to-peak across the year - a classic four-seasons rhythm.
Baseline vs recent monthly temperature climatology. Biggest warming: Feb (+2.7°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 Luxembourg
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 Luxembourg changing?
Luxembourg 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 Luxembourg come from?
Climate data for Luxembourg 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 Luxembourg climate data cover?
The Luxembourg climate profile covers Luxembourg City, Esch-sur-Alzette, Differdange, Dudelange and surrounding areas. Temperature, rainfall and emissions data for Luxembourg
How often is the Luxembourg climate update refreshed?
The Luxembourg 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.