Warm weather in June saw gas demand drop 9%

Warm weather in June saw gas demand in Ireland fall 9% last month compared to May, and 7% lower than in June 2024, figures from Gas Networks Ireland show. 

Warm weather in June saw gas demand in Ireland fall 9% last month compared to May, and 7% lower than in June 2024, figures from Gas Networks Ireland show. 

June 2025 was the fourth warmest June on record, despite wet conditions. Gas generated 36% of Ireland’s electricity in June, down from 40% in May and 42% in June 2024. Gas use peaked at 90% of all energy required in June and never dropped below 14%. Wind energy accounted for 30% of electricity use for the period - up eight percentage points from 22% in May — and ranged from less than 1% to a peak of 75%.

Gas demand across most sectors saw year-on-year declines in June, with 21% reductions in residential use, largely driven by the warm weather which reduced heating needs.

However, compressed natural gas (CNG) demand grew by 26% year-on-year. Made by compressing natural gas down to less than 1% of its volume, CNG is a more environmentally friendly fuel than petrol or diesel and is used extensively in the Irish haulage industry with a cleaner alternative fuel option.

“While overall gas demand typically dips over the summer months, it remains central to the resilience of Ireland’s energy system. June’s data again illustrates how gas consistently supports electricity generation during periods of low wind, helping to keep the system secure and balanced," said Gas Networks Ireland’s director of strategy and regulation Edwina Nyhan. 

"The steady growth in demand for CNG, including a 26%increase in June year on year, reflects continued momentum in decarbonising the transport sector. This progress is further supported by recent developments such as the opening of a new public CNG station in Dublin and the launch of the GRAZE vehicle grant scheme, which is already generating strong interest from fleet operators.

"At the same time, we are making important strides in supporting the build out of the biomethane industry, including the recent signing of a Memorandum of Understanding with CycleØ to help connect new biomethane production sites to the gas network.”

Gas Networks Ireland operates and maintains Ireland’s €3bn, 14,725km national gas network. Almost 725,000 Irish homes and businesses use natural gas.