New York City, September 18 2025 – This year’s Climate Week NYC will be the biggest yet in its 16-year history, with a record-breaking number of events, unprecedented levels of government participation, and the largest lineup of corporate partners to date.
Taking place from September 21-28 and hosted by Climate Group, Climate Week NYC will see over 1000 official events registered across town, compared to last year’s 900. They are organized by hundreds of organizations, businesses and governments, making it the most significant international climate gathering outside of COP.
The event comes at a critical moment for global climate action and signifies the determination of many governments, businesses and civil society to Power On, with over 100,000 people expected to join in person and thousands joining online.
Confirmed government figures include:
They will be joined by dozens of influential voices including:
Helen Clarkson, CEO of Climate Group, said: “This is a critical year for climate action. It’s inspiring to see businesses, governments, and the wider climate community stepping up to show the world that global climate action continues. Our theme this year is Power On, because we need to stay focused, ambitious, and keep delivering progress. New York City has really lived up to that spirit this year and it's shaping up to be the most impactful Climate Week NYC we’ve ever held.”
The world is changing at an astonishing speed. Shifting geopolitical realities are reshaping trade and supply chains, while energy security, competitiveness, AI and innovation are topping the political and business agendas.
To tackle these realities and celebrate what’s already been achieved, Climate Week NYC, which is held alongside the UN General Assembly, brings together heads of government, ministers, business leaders, activists to push for climate progress, decarbonize energy systems, create thriving job markets, and a clean future for the next generations.
Highlights for 2025 include:
Donny Simmons, Group President, Americas, of Trane Technologies, Climate Week NYC’s Headline Sponsor, said: “We’re thrilled to be part of this year’s Climate Week NYC as a key partner in what’s shaping up to be the biggest edition ever. It's fantastic to see the global climate community come together to spark new partnerships and push forward the bold action we all need. At Trane Technologies, we see this as a chance to show what’s possible when business, governments, and civil society work together to create impact at scale and accelerate progress towards a more sustainable future.”