• April 2025 was the second-hottest April on record globally, with temperatures 1.51C above pre-industrial levels, marking the 21st month in nearly two years exceeding the 1.5C limit.
• Sea surface temperatures reached the second-highest April average, with particularly warm anomalies recorded in the northeast North Atlantic and most of the Mediterranean Sea.
• Arctic and Antarctic sea ice extents were significantly below average, indicating continued polar ice decline and further contributing to global warming concerns.

In April 2025, global temperatures soared, reaching the second-highest April levels on record. Data from the Copernicus Climate Change Service (C3S) revealed that temperatures were 1.51C above pre-industrial levels, continuing a concerning trend of exceeding the 1.5C warming threshold set by the Paris Agreement. This trend, driven by human activities and greenhouse gas emissions, leads to extreme weather events and long-term climate impacts. The persistent breach highlights the urgent need for global action to mitigate climate change.

• What: Global temperatures in April 2025 reached the second-highest levels on record, exceeding the 1.5C warming threshold. Sea surface temperatures were also high, and polar ice levels continued to decline.
• Who: The EU’s Copernicus Climate Change Service (C3S), scientists, and countries participating in the Paris Agreement.
• When: April 2025, with data covering the 12-month period from May 2024 to April 2025, and historical comparisons to pre-industrial levels (1850-1900).
• Where: Global, with specific mentions of Europe, Russia, Kazakhstan, Norway, the Russian Far East, North America, Australia, Antarctica, and various ocean regions.

The data from April 2025 underscores the accelerating pace of global warming. Exceeding the 1.5C threshold, even temporarily, has significant implications for extreme weather events and long-term climate stability. The persistent rise in sea temperatures and the decline in polar ice extent further exacerbate these issues, creating feedback loops that accelerate warming. Continuous monitoring and immediate actions to reduce greenhouse gas emissions are critical to mitigate the worst impacts of climate change.

Globally, April 2025 was the second hottest April on record, continuing the long sequence of months over 1.5C above pre-industrial. Continuous climate monitoring is an essential tool for understanding and responding to the ongoing changes of our climate system.

April 2025's record-breaking temperatures serve as a stark reminder of the ongoing climate crisis. The breach of the 1.5C warming threshold, coupled with rising sea temperatures and declining polar ice, highlights the urgent need for global cooperation and immediate action. While efforts to mitigate climate change continue, the current trends indicate that more aggressive measures are required to avert the most catastrophic consequences.