Weather Patterns and Climate Trends — 2025–2026 Guide

1. Global Temperature Records — 2025 in Context

The World Meteorological Organization (WMO) confirmed in January 2026 that 2025 was one of the three warmest years on record, continuing an extraordinary streak of global heating. Specifically, the global average surface temperature reached 1.44 °C (± 0.13 °C) above the 1850–1900 pre-industrial baseline, according to WMO’s consolidated analysis of eight independent datasets. [wmo](https://wmo.int/news/media-centre/wmo-confirms-2025-was-one-of-warmest-years-record)

Moreover, two of these datasets ranked 2025 as the second warmest year in the 176-year record, while the other six placed it third. Notably, the past three years — 2023, 2024, and 2025 — constitute the three warmest years across all eight datasets, underscoring the acceleration of long-term warming trends. [wmo](https://wmo.int/news/media-centre/wmo-confirms-2025-was-one-of-warmest-years-record)

In parallel, the Copernicus Climate Change Service reported that 2025 was the third warmest year on record, only marginally (0.01 °C) cooler than 2023 and 0.13 °C cooler than 2024 — the warmest year on record. Additionally, the past 11 years (2015–2025) now represent the 11 warmest on record, a statistic that highlights the persistent nature of contemporary climate trends. [climate.copernicus](https://climate.copernicus.eu/copernicus-2025-was-third-hottest-year-record)

Furthermore, NOAA’s analysis placed 2025 as the third-warmest year in its 176-year record, with a global surface temperature 2.11 °F (1.17 °C) higher than the 20th-century baseline. By contrast, NASA’s Goddard Institute for Space Studies confirmed that 2025, 2024, and 2023 were the three warmest years in its 146-year temperature record. [ncei.noaa](https://www.ncei.noaa.gov/news/global-climate-202513)

Human-Induced Warming Component

Crucially, a June 2026 study published in Earth System Science Data estimated that human-induced warming reached 1.37 °C relative to 1850–1900 in 2025, increasing at a rate of 0.27 °C per decade over 2016–2025. Consequently, the majority of observed warming is now attributable to anthropogenic greenhouse gas emissions, a finding that carries profound implications for mitigation policy. [essd.copernicus](https://essd.copernicus.org/articles/18/3889/2026/)

2. Extreme Weather Events — 2025–2026 Data

Extreme weather events in 2025 caused widespread disruption and devastation, highlighting the vulnerability of interconnected economies and societies. According to WMO’s State of the Global Climate 2025 report, intense heat, heavy rainfall, and tropical cyclones were among the most destructive phenomena observed globally. [wmo](https://wmo.int/publication-series/state-of-global-climate/state-of-global-climate-2025)

In particular, a January 2026 analysis by Yale Climate Connections reported that Earth was hit by 55 billion-dollar weather disasters in 2025, including the costliest wildfire on record and the sixth-deadliest heat wave in documented history. Moreover, four floods or storms in 2025 each caused at least 1,000 deaths, reflecting the escalating human toll of climate-amplified extremes. [yaleclimateconnections](https://yaleclimateconnections.org/2026/01/earth-was-hit-by-55-billion-dollar-weather-disasters-in-2025/)

Meanwhile, in the United States, Climate Central documented a record number of flash floods in 2025, including the deadly July floods in Texas. Additionally, carbon pollution made 89% of record high daily temperatures set across 247 major U.S. cities more likely — and influenced risky extreme heat events around the globe. [climatecentral](https://www.climatecentral.org/climate-matters/five-things-to-know-about-climate-change-in-2025)

Notable 2025 Extreme Events

Wikipedia’s compilation of significant 2025 weather events lists several catastrophic incidents, including the 2025 European heatwaves (April–September 2025), which caused between 14,956 and 16,500+ deaths. Furthermore, Cyclone Senyar (November 25–30, 2025) resulted in 1,500–2,271+ fatalities, while the 2025 Pakistan floods (June–September 2025) claimed 1,037+ lives. [en.wikipedia](https://en.wikipedia.org/wiki/Weather_of_2025)

In addition, the 2025 India–Pakistan heat wave (April–July 2025) caused at least 84 deaths, and the 2025 Tarasin landslide (August 31, 2025) resulted in 375–1,573 fatalities. These figures illustrate the disproportionate impact of extreme weather on South Asian populations, a pattern consistent with long-term vulnerability assessments. [en.wikipedia](https://en.wikipedia.org/wiki/Weather_of_2025)

Beyond 2025, early 2026 data indicate continued volatility. For instance, the U.S. experienced 12 billion-dollar weather and climate disasters during the first half of 2026, dominated by severe storms that caused at least $31.9 billion in damages and 183 fatalities. Consequently, the frequency of billion-dollar severe storms has surged over the last decade, reaching a record 21 events in 2025 alone. [climatecentral](https://www.climatecentral.org/climate-matters/mid-year-billion-dollar-disasters)

3. AI in Weather Forecasting — Operational Breakthroughs

Artificial intelligence has crossed a critical threshold in meteorology, with AI weather models now operational in multiple national forecasting systems. Notably, in the summer of 2025, the Indian government sent AI-generated forecasts of monsoon onset to 38 million farmers, warning of delayed rains and enabling proactive agricultural planning. [cacm.acm](https://cacm.acm.org/news/ai-weather-forecasting-goes-operational/)

Furthermore, the European Centre for Medium-Range Weather Forecasts (ECMWF) launched the AI Weather Quest in 2025, an international initiative to evaluate machine learning methods for sub-seasonal prediction (two to six weeks ahead). By March 2026, 42 teams from 15 countries had participated, with Microsoft-led MicroEnsemble emerging as the top performer for the December 2025–February 2026 period. [ecmwf](https://www.ecmwf.int/en/about/media-centre/science-blog/2026/ai-weather-quest-2026)

AI Weather Quest Results

During the AI Weather Quest, participants submitted global quintile-based probabilistic forecasts at three- and four-week lead times for near-surface temperature, mean sea level pressure, and accumulated precipitation. Forecasts were evaluated against the near real‑time ERA5T reanalysis using a climatology-based ranked probability skill score (RPSS) metric. [ecmwf](https://www.ecmwf.int/en/about/media-centre/science-blog/2026/ai-weather-quest-2026)

Importantly, MicroDuet significantly outperformed the ECMWF Integrated Forecasting System (IFS) for all variables and lead times in early competition periods. However, the best data‑driven and hybrid models showed limited significant improvements over the dynamical system, except for precipitation at both lead times. [ecmwf](https://www.ecmwf.int/en/about/media-centre/science-blog/2026/ai-weather-quest-2026)

In parallel, NOAA’s Earth Prediction Innovation Center introduced Project EAGLE (Experimental AI Global and Limited-area Ensemble forecast system) in early 2026, a dedicated pipeline to accelerate the evaluation and operational transition of AI forecast models. The early version produces daily deterministic and ensemble forecasts using a NOAA-tuned version of Google DeepMind’s GraphCast, fine-trained on inputs from NOAA’s Global Data Assimilation System. [epic.noaa](https://www.epic.noaa.gov/ams-ai-presentations/)

WMO AI Conference — September 2025

The World Meteorological Organization convened the WMO AI Conference in Abu Dhabi from September 9–11, 2025, themed “AI for Weather Prediction: Advances, Challenges & Future Outlook”. The conference produced a statement identifying key priority areas for future global collaboration in meteorological AI, including strengthening data foundations, establishing trustworthy evaluation frameworks, and advancing capacity building. [sciopen](https://www.sciopen.com/article/10.11676/qxxb2026.20260032)

Moreover, a June 2026 review in Acta Meteorologica Sinica highlighted that AI technologies in meteorology are developing rapidly, demonstrating significant potential in observation, prediction, and service delivery. Nevertheless, challenges remain, including technological gaps, lagging regulation, data imbalance, and limited generalization ability for extreme events. [sciopen](https://www.sciopen.com/article/10.11676/qxxb2026.20260032)

4. Health and Economic Impacts — Attribution Science

Heat stress is a leading cause of weather-related deaths and can exacerbate underlying illnesses including cardiovascular disease, diabetes, and mental health conditions. Between 2000–2019, studies show approximately 489,000 heat-related deaths occur each year globally, with 45% in Asia and 36% in Europe. [who](https://www.who.int/news-room/fact-sheets/detail/climate-change-heat-and-health)

In Europe alone during the summer of 2022, an estimated 61,672 heat-related excess deaths occurred — a figure that foreshadowed the even deadlier 2025 season. Subsequently, a study by researchers at Imperial College London and the London School of Hygiene & Tropical Medicine found that climate change was responsible for an estimated 16,500 additional deaths across 854 European cities in the summer of 2025. [who](https://www.who.int/news-room/fact-sheets/detail/climate-change-heat-and-health)

Meanwhile, in India, heatwaves are killing tens of thousands annually, yet officials are barely counting them, according to a June 2026 Euronews investigation. One estimate suggests that a single day of extreme heat causes approximately 3,400 excess deaths nationally in India, meaning a five-day heatwave is linked to nearly 30,000 additional fatalities. [euronews](https://www.euronews.com/2026/06/10/heatwaves-are-killing-tens-of-thousands-in-india-officials-are-barely-counting-them)

Economic Costs — U.S. Billion-Dollar Disasters

The U.S. has sustained 438 billion-dollar weather and climate disasters since 1980, with a total cost exceeding $3.2 trillion as of June 2026. Furthermore, the frequency of billion-dollar severe storms has surged over the last decade, reaching a record 21 events in 2025. [climatecentral](https://www.climatecentral.org/climate-matters/mid-year-billion-dollar-disasters)

Through June 2026, the U.S. experienced 12 billion-dollar disasters in the first half of the year alone, dominated by severe storms that caused at least $31.9 billion in damages and 183 fatalities. Consequently, the number of billion-dollar disasters so far in 2026 ranks fifth for the most January–June events since records began in 1980. [climatecentral](https://www.climatecentral.org/climate-matters/mid-year-billion-dollar-disasters)

5. Preparedness Strategies — Evidence-Based Guidelines

Severe weather preparedness requires a multi-layered approach encompassing awareness, early decision-making, and advance preparation. The U.S. Department of Public Safety’s 2025 Severe Weather Preparedness Guide recommends putting together an emergency supply kit, planning for flooding, handling excessive heat, and including pets or animals in emergency plans. [mbl](https://www.mbl.edu/mbls-emergency-management-program/severe-weather-preparedness-plan)

Moreover, Ready.gov advises developing an emergency plan based on local weather hazards and practicing it regularly. Specifically, families should create an emergency kit for every member, including important documents, batteries, a weather radio, hygiene supplies, medications, food, and water. [ready](https://www.ready.gov/severe-weather)

Heat Safety — WHO Guidelines

The World Health Organization recommends avoiding going outside and doing strenuous activity during the hottest time of day, staying in the shade, and using the night air to cool down homes by opening windows after dark. Additionally, during the day when outdoor temperatures are higher than indoors, close windows and cover them with blinds or shutters to block direct sunlight. [who](https://www.who.int/news-room/fact-sheets/detail/climate-change-heat-and-health)

Furthermore, individuals should drink water regularly — one cup per hour and at least 2–3 litres per day — and take cool showers or baths to reduce core body temperature. These measures are particularly critical for vulnerable populations, including the elderly, children, and those with pre-existing health conditions. [who](https://www.who.int/news-room/fact-sheets/detail/climate-change-heat-and-health)

Cyclone and Flood Preparedness

HelpLocal.in’s 2026 disaster management guide outlines specific steps for cyclone and flood preparedness. Before a cyclone, lock windows and doors, stock non-perishable foods and bottled water, and stay updated with official weather notices. During the cyclone, remain indoors away from windows, turn off electricity and gas, and listen to emergency broadcasts. [helplocal](https://helplocal.in/blog/disaster-management-strategy-significance/)

Similarly, before a flood, follow weather alerts, move valuable possessions to higher ground, stock emergency kit essentials, and plan evacuation routes. During the flood, move to higher and safer regions, do not walk or drive in flood water, turn off electrical devices, and obey evacuation orders. [helplocal](https://helplocal.in/blog/disaster-management-strategy-significance/)

6. Regional Focus — India, Europe, and the Americas

Regional disparities in weather impacts are stark. In 2025, the U.S. had its fourth-hottest year on record, with average temperatures for the contiguous U.S. 2.6 °F (1.4 °C) warmer than the 20th-century average. Meanwhile, Europe experienced its third-warmest year on record in 2025, with an average temperature of 10.41 °C — 1.17 °C above the 1991–2020 reference period. [climate.copernicus](https://climate.copernicus.eu/copernicus-2025-was-third-hottest-year-record)

In India, the 2025 monsoon season was marked by delayed onset and erratic rainfall, prompting the government to deploy AI-generated forecasts to 38 million farmers. Additionally, the 2025 India–Pakistan heat wave (April–July 2025) caused at least 84 deaths, though unofficial estimates suggest far higher mortality. [en.wikipedia](https://en.wikipedia.org/wiki/Weather_of_2025)

Europe — Heat Mortality Trends

The ESOTC 2025 report confirms that heat remains the leading cause of reported deaths due to extreme weather in Europe. Across the WHO European Region, heat-related mortality has increased by approximately 20% over the past two decades, a trend attributed to both rising temperatures and aging demographics. [health.hub.copernicus](https://health.hub.copernicus.eu/climate-and-health-europe-key-insights-esotc-2025)

Moreover, a November 2025 study in Nature Climate Change projected a substantial death toll from potential future extreme heat events in Europe, based on historically observed meteorological patterns. The study warns that prolonged exposure to high ambient temperatures impairs the body’s ability to dissipate heat, leading to elevated core temperature and heightened cardiovascular strain. [nature](https://www.nature.com/articles/s41558-025-02480-1)

7. Frequently Asked Questions