2025 Climate Signals: What Changed and What Works
ClimateSignal Research distills global evidence from 2025 into clear insights. We track temperature records, emissions trends, and the rapid rise of clean energy. Our goal is practical: help decision makers act faster with reliable data, transparent methods, and real-world case studies that scale. Explore the highlights below, then dive into the full datasets, methodology, and actions that communities and businesses can take today.
°C above 1850–1900 est. global mean
% of electricity from renewables
Gt CO₂e emissions decline vs 2023
countries updated NDCs in 2025
2025 at a glance
This year saw continued warming driven by greenhouse gases and a strong El Niño at the start, followed by neutral conditions. Heat and hydrological extremes affected multiple regions, with record marine heat waves and damaging floods in parts of Asia and Europe. At the same time, clean technologies scaled faster than forecast, with utility-scale solar and onshore wind adding record capacity, and battery storage easing peak demand. Emissions edged down in several large economies, though progress remains uneven. The signal is clear: resilience and rapid decarbonization must advance together.
Global mean temperature for 2025 remained near the high range of the instrumental record. Monthly anomalies peaked early in the year, then moderated. Land regions experienced stronger warming than oceans, and nighttime temperatures rose faster than daytime, stressing health and agriculture. Heat action plans saved lives where implemented.
Signals in pictures
What you can do in 2025
Cities, companies, and households each have levers that cut emissions and build resilience. The biggest wins this year come from clean electricity, efficient buildings, and better transit. Financial incentives and new standards make choices easier, while community plans protect vulnerable groups during heat, flood, or smoke events. Our action library highlights steps with proven impact, cost ranges, and implementation tips that match local context.