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Climate change accounted for 27% of the rate of heat-related emergency room visits in the U.S. during 2018-2025. August 2026 was the warmest August on record globally, with record warmth affecting 13.2% of global land and ocean areas. In the U.S., Summer 2026 was the warmest on record for the contiguous region, and August 2026 was the warmest August for average, maximum, and minimum temperatures since 1895. Drought affected at least 81% of the contiguous U.S. as of September 8, 2026, and nearly 8.3 million acres burned year-to-date, driven by increased 'fire weather' days. Attribution analysis using the Climate Shift Index (CSI) indicates human-caused climate change drove summertime warming trends in 91% of analyzed U.S. cities. Additionally, a strong El Niño event is projected to peak around February 2027, with global temperature anomalies potentially reaching 1.7C above pre-industrial levels.

June 2026 was the second-warmest June on record globally, with the Arctic experiencing its warmest June ever. In the U.S., 66% of the contiguous region faced abnormally dry or drought conditions by July 7, 2026, and the West and Southwest regions saw their warmest January-June period on record. A very strong El Niño is forecast to develop between October and December 2026, with an 81% probability, likely pushing global temperatures to or above 1.5C by October. Climate Central's analysis indicates human-caused climate change is a key driver of summertime warming in 91% of analyzed U.S. cities.

The May 2026 report highlights that the month was the second-warmest on record globally, with carbon dioxide levels reaching a new monthly peak of 432.3 ppm. In the United States, spring 2026 was the second-warmest on record for the contiguous U.S., while 77% of the region experienced abnormally dry or drought conditions as of early June. The report also notes a developing potentially very strong El Niño and record-low snowpack in several western states.

The document reports that Europe experienced a November 2025 temperature 1.38°C above the 1991-2020 mean, with record highs in central western Russia and record low precipitation in Turkey. For the January-March 2026 period, forecasts project warmer-than-average temperatures across Europe, particularly in the northeast, and generally weakly positive precipitation anomalies, though soil moisture is expected to be weakly negative in Spain, Italy, central Europe, and Turkey.

January 2026 was the fifth-warmest January on record globally, characterized by significant temperature anomalies in the U.S. West and record-low snowpacks in several states. The document highlights the transition of NOAA to the Relative Oceanic Niño Index (RONI) to better account for climate change in ENSO tracking. Attribution analysis using the Climate Shift Index (CSI) indicates that extreme warmth in the northern U.S. and specific cities like San Juan and Honolulu was strongly driven by carbon pollution.

August 2025 was the third warmest August globally on record, with all ten warmest Augusts occurring since 2015. In the United States, 98% of analyzed cities have experienced fall warming, and as of September 9, at least 60% of the country faces abnormally dry or drought conditions. A record-breaking marine heatwave in the North Pacific Ocean, attributed to climate change, is expected to persist into October.

The research modeled land surface temperature (LST) time series from July 2013 to July 2016 using Landsat-8 data and a radiative transfer equation algorithm. The study found that LST in the dry season was 1520 K higher than in the wet season, with early successional stages being significantly warmer than intermediate and late stages during the dry season. While leaf phenology and canopy architecture explain most variations, precipitation was identified as the ultimate determinant of LST variations through biogeochemical and biogeophysical processes.

The project investigates tropical cyclone dynamics in the Eastern Pacific, emphasizing the role of atmospheric circulations and external factors like warm dry air from the US in track prediction. Initial results include the creation of a historical database of cyclones hitting Mexican Pacific States and the training of over 100 students. The project concludes that regional-level climate studies and data collection must be expanded to accurately assess regional risks.

The document analyzes temperature trends in the central Peruvian Andes using MODIS satellite data, finding that warming is occurring across the region but intensifies with altitude. It highlights the risk to high-mountain ecosystems and water supplies, urging for targeted research and adaptation policies for high-risk regions and crops.