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Analysis by Climate Central indicates that Denmark experienced an average of three additional weeks of winter days above freezing annually between 2014 and 2023 due to climate change. Denmark ranks fourth globally among 123 analyzed countries for the most additional winter days above freezing. In Copenhagen, climate change added at least 25 winter days above freezing each year compared to a scenario without climate change.

Climate change has led to a significant increase in 'lost winter days' across France, with the country experiencing at least 10 additional days above freezing annually over the last decade. This trend affects snowfall, winter sports, and ecosystems, with the Grand Est region seeing the highest increase of 14 additional days per year.

Analysis of daily minimum temperatures from 2014 to 2023 shows that Germany experienced more than two additional weeks of days above freezing annually due to climate change. This trend was observed across all six analyzed German cities, with Munich seeing the highest increase at 24 additional days per year. These 'lost winter days' impact snowfall, winter sports, water supplies, crops, and ecosystems.

Climate change is significantly increasing the number of winter days with minimum temperatures above 0°C across the Northern Hemisphere. Analysis of the decade 2014-2023 shows that over one-third of analyzed countries and 44% of analyzed cities experienced at least one additional week of above-freezing days annually. Europe is the most affected region, with some countries like Lithuania and Latvia seeing over 20 additional above-freezing days per year. These shifts impact snowfall, the USD 12.5 billion winter sports industry, water supplies, and ecosystem health.

Analysis of Italian cities from 2014-2023 shows a significant increase in 'lost winter days' (days above 0°C), with Turin ranking as the third city globally for the most added winter days above freezing.

Analysis of daily minimum temperatures in Japan from 2014 to 2023 indicates that climate change has added at least eight winter days above freezing annually across the country. In 32 of 57 analyzed Japanese cities, this increase amounted to at least two additional weeks of days above freezing per year. These 'lost winter days' impact snowfall, water supplies, crops, and winter sports.

The analysis finds that Norway experienced at least one additional week of winter days above freezing annually from 2014 to 2023 due to climate change. Approximately 80% of Norway's divisions saw more than one additional week of such days each year. The report notes that this loss of winter chill impacts snowfall, winter sports, water supplies, crops, and spring allergies.

Climate change has significantly increased the number of winter days above freezing in Poland, with the country ranking fifth globally for the most lost chilled winter days. Between 2014 and 2023, Poland experienced nearly three additional weeks of days above freezing annually, with all 13 analyzed cities seeing at least two additional weeks per year.

The analysis finds that Spain experienced an average of eight additional days above freezing annually during the winter months of December, January, and February from 2014 to 2023 due to climate change. This trend affected 62% of Spanish provinces, with the highest increases observed in provinces such as León, which saw 17 additional days above freezing annually. The report highlights that these 'lost winter days' impact snowfall, water supplies, crops, and winter sports.

The analysis finds that climate change has increased the number of winter days with minimum temperatures above 0°C across the United Kingdom, with a national average of 11 additional days per year. England experienced the highest increase with 12 additional days, followed by Scotland and Wales with 10, and Northern Ireland with 8.

Climate change increased the maximum wind speeds of every Atlantic hurricane in 2024 by 3 to 14 mph, with some storms moving into higher Saffir-Simpson categories. The analysis, based on a rapid attribution framework, found that human-caused global warming elevated ocean temperatures by as much as 2.5°F, making elevated sea surface temperatures in hurricane tracks up to 800 times more likely.

In November 2024, the Western Pacific saw a record four simultaneous named tropical systems—Typhoon Yinxing, Typhoon Toraji, Super Typhoon Usagi, and Super Typhoon Man-Yi—all of which experienced rapid intensification due to warmer-than-average sea surface temperatures. Analysis using the Climate Shift Index: Ocean indicates these temperatures were made up to 40 times more likely by human-caused climate change. The Philippines was severely affected by 16 tropical cyclones or their remnants this season, resulting in at least 160 deaths and the displacement of over 9 million people due to flooding, landslides, and infrastructure damage.

Climate Central's analysis of U.S. data from 1970 to 2024 shows that winter is the fastest-warming season for 74% of analyzed locations. Average winter temperatures rose by 4°F across 235 locations, with the highest warming seen in the Upper Midwest, Northeast, and Ohio Valley. The report notes a decrease in freezing nights and shorter cold streaks, alongside an increase in warmer-than-normal winter days. These trends impact western water supplies, residential energy use, the $27 billion fruit and nut industry, and the prevalence of disease-carrying pests.

In October 2024, 185 of 191 analyzed U.S. cities were warmer than normal, with the Southwest experiencing particularly high anomalies. The report highlights that 19 cities saw their hottest October on record and identifies specific states, including Texas, Arizona, and New Mexico, where climate change significantly increased the likelihood of extreme temperatures as measured by the Climate Shift Index.

The document details how climate-driven flooding, including extreme rainfall and sea level rise, disproportionately affects children's physical and mental health. It highlights risks such as respiratory issues from mold, mental health distress, and displacement, while noting that socioeconomic disparities exacerbate these vulnerabilities. The text provides guidance for caregivers on disaster preparedness and advocates for community resilience and rapid carbon emission cuts to protect future generations.

In November 2024, 166 out of 191 analyzed U.S. cities were warmer than normal, with the South averaging 5.7°F above average. While long-term warming trends are evident—with El Paso, Texas warming 6.4°F since 1970—daily climate attribution signals (CSI 3 or higher) remained rare due to fall weather variability, though they were most prominent in Gulf Coast states and Puerto Rico.

The October 29, 2024, floods in Valencia, Spain, were driven by a low-pressure system (DANA) that utilized an atmospheric river carrying moisture from an unusually warm Tropical Atlantic. Analysis using the Climate Shift Index: Ocean and OISST data indicates that human-caused climate change made these elevated sea surface temperatures 50 to 300 times more likely.

The document details how human activities, primarily the burning of fossil fuels, have increased atmospheric concentrations of carbon dioxide, methane, and nitrous oxide to levels higher than any point in the last 800,000 years. These gases have caused a combined 1.6°C of global warming since 1850, with CO2 and methane accounting for 95% of this increase. In the United States, 76% of greenhouse gas emissions originate from three sectors: transportation (28%), electric power (25%), and industry (23%). The text emphasizes that while the U.S. has reduced emissions to approximately 17% below 2005 levels, the pace of reduction must more than triple to meet 2030 national targets.

Since 1970, fall temperatures in the U.S. have increased by an average of 2.5°F, with October nights warming by 3.3°F in 89% of 242 analyzed U.S. cities.

Climate Central's analysis of 200 U.S. cities shows that the first fall freeze is arriving later in 85% of locations, delaying the date by an average of 11 days since 1970. This trend, alongside a 2.4°F average increase in fall temperatures across the contiguous U.S., extends growing seasons and disrupts ecological cues, leading to prolonged allergy seasons, lingering pests, and reduced yields for the U.S. fruit and nut industry.