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In July 2026, the United States experienced widespread above-average temperatures, with an average anomaly of 1.5°F across 192 cities. The Northern Rockies and Plains were the warmest region, exceeding normals by more than 4.0°F. Long-term data indicates that 185 of the 192 analyzed cities have warmed since 1970, with Reno, Nevada, showing the most significant increase. Climate attribution analysis using the Climate Shift Index (CSI) showed that San Juan, Puerto Rico, had 31 days where temperatures were at least two times more likely due to climate change.

In June 2026, the United States experienced slightly above-average temperatures, with an average anomaly of 0.7°F across 192 analyzed cities. The Southwest was the warmest region, with temperatures more than 2.9°F above normal, and Flagstaff, Arizona, recorded the most unusual warmth at 4.0°F above normal. Long-term trends show that 189 of the 192 cities have warmed since 1970, with Reno, Nevada, seeing the greatest increase of 10.6°F. Climate attribution analysis using the Climate Shift Index (CSI) indicates that San Juan, Puerto Rico, had 30 days where temperatures were at least two times more likely due to climate change.

Analysis of USA National Phenology Network data shows that first spring leaves now emerge earlier in 88% of 242 major U.S. cities, shifting by an average of six days since 1981. This trend, combined with a freeze-free growing season that has stretched 21 days longer on average across 173 cities between 1970 and 2025, extends allergy seasons and increases the risk of 'false spring' crop losses. Ecological disruptions include potential mismatches between bird migration and the peak abundance of food sources.

In February 2026, the United States experienced an average temperature anomaly of 2.1°F across 192 cities. While the Northeast was the coldest region with an average anomaly of -3.4°F, the Northern Rockies and Plains were the warmest, exceeding normal temperatures by more than 8.4°F. Long-term data indicates that 173 of the 192 analyzed cities have warmed since 1970, with Albany, Georgia, showing the greatest increase at 8.4°F. Climate attribution analysis using the Climate Shift Index (CSI) found that San Juan, Puerto Rico, had 16 days where temperatures were at least five times more likely due to climate change.

Analysis of 244 U.S. weather stations shows that 86% of locations have seen an increase in extremely warm winter days since 1970, with the coldest day of the year warming by an average of 7°F across 242 locations.

In November 2025, the United States experienced an average temperature anomaly of 2.1°F across 194 analyzed cities, with the western half of the country seeing exclusively above-average temperatures. The Southwest, South, and Northern Rockies and Plains were the most unusually hot regions, with anomalies exceeding 4.8°F. Waco, Texas, recorded the highest anomaly at 7.5°F. Long-term trends show 183 of 194 stations have warmed since 1970, with El Paso, Texas, seeing the greatest increase of 6.9°F. Climate attribution via the Climate Shift Index (CSI) highlighted San Juan, Puerto Rico, with 27 days at CSI 5, meaning temperatures were at least five times more likely due to climate change.

Analysis of 245 U.S. cities shows that 92% experienced rising November temperatures since 1970, with an average increase of 2.4°F. The highest warming occurred in El Paso, Texas (6.4°F), followed by Phoenix and Tucson, Arizona. This warming trend, alongside earlier springs and hotter summers, threatens cranberry production in the Northeast through frost vulnerability and 'cranberry scald', potentially increasing food prices.

Analysis of 244 U.S. cities shows that winters are the fastest-warming season for most of the country, with average temperatures increasing by 3.9°F since 1970. This trend is characterized by fewer freezing nights, shorter cold streaks, and a significant increase in warmer-than-normal winter days, particularly in the Northeast and Upper Midwest. These changes threaten mountain snowpack, crop yields for the $27 billion fruit and nut industry, and the winter recreation economy, while potentially increasing pest-related health risks and allergy durations.

Between 2021 and 2025, rents in the United States' workforce housing sector—the lowest-rent market-rate housing—increased by over 20%, more than double the 9.2% increase seen in 'discretionary' housing. The report finds that in most of the 94 analyzed markets, rent increases for low-income tenants outpaced those for high-income tenants, with the most significant regional increases occurring in Florida (26.8%), the Northeast (25.3%), and the Pacific Northwest (23.2%). The analysis suggests that investor landlords, including private equity firms, target this sector as a reliable profit source due to high demand and a captive renter class. The report warns that these increases are likely to drive higher rates of eviction and self-eviction and calls for policy interventions such as price controls and eviction protections.

Climate Central analysis of 204 U.S. cities shows that the first fall freeze is arriving later in 88% of locations, delaying the date by an average of 12 days since the early 1970s. This trend extends the growing season for ragweed, prolonging allergy seasons, and disrupts ecological cues for bird migration, hibernation, and fall foliage. Additionally, the delay affects the $27 billion U.S. fruit and nut industry by reducing necessary chilling periods and allowing disease-carrying insects like mosquitoes to persist longer into the year.

The report finds that rents for the lowest-cost unsubsidized market-rate housing (workforce housing) increased by 20.2% nationally between 2021 and 2025, more than double the 9.2% increase for luxury (discretionary) housing. This trend is most pronounced in the Sunbelt region, where corporate landlords, including private equity firms, target workforce housing as a low-risk, high-cash-flow investment. The document highlights a crisis of evictions and 'self-evictions' driven by these price hikes and argues that government-sponsored enterprises (GSEs) like Fannie Mae and Freddie Mac facilitate this corporate takeover by providing easy financing with few tenant protections. It recommends policy interventions such as rent control, just cause eviction laws, and the adoption of investment standards for public pension funds.

August 2025 in the United States was generally cooler than normal, with an average anomaly of -0.5°F across 196 cities, though 189 of those cities have shown long-term August warming trends since 1970. Despite the monthly average, 27 cities experienced at least two weeks of Climate Shift Index (CSI) values of 2 or higher, and San Juan, Puerto Rico, saw 28 days at CSI 5, indicating a strong climate change influence on those specific days.

Using Google Search data, the Yale Program on Climate Change Communication identifies that interest in climate change in the United States follows predictable cycles tied to Earth Day and the school year, as well as spikes driven by extreme weather. While heatwaves trigger nationwide interest, events like wildfires produce more localized spikes based on geographic exposure, such as the 2023 Canadian wildfires affecting the American Northeast. The authors argue that these trends can be used by decision-makers to time communications on risk, adaptation, and the transition to renewable energy when public awareness is highest.

Over 10 million US homes still rely on delivered fuels like oil and propane, which are expensive and polluting. Transitioning these households to air-source heat pumps (ASHPs) and heat pump water heaters (HPWHs) could save US customers nearly $8 billion annually in energy bills and significantly reduce carbon and air pollution. The document advocates for state-level policy changes, such as allowing fuel switching in utility energy efficiency programs and implementing clean heat standards, alongside targeted outreach and contractor training to support rural and low-income households.

Climate Central analyzed 243 U.S. locations and found that 67% have already shifted to warmer planting zones between 1951-1980 and 1995-2024. Projections based on the SSP2-4.5 pathway suggest 90% of these locations will shift to warmer zones by mid-century (2036-2065), with the Upper Midwest expected to see the most significant warming.

Climate Central's analysis of 198 U.S. cities shows that 87% have experienced longer freeze-free growing seasons since 1970, increasing by an average of 20 days. This trend, driven by carbon pollution and warming, extends the period plants release pollen, worsening seasonal allergies for millions, including approximately 19% of U.S. children. The report highlights that CO2 levels also boost pollen production, potentially increasing it by 200% by the end of the century, with disproportionate health impacts on Black and Puerto Rican children who face higher asthma risks.

Climate Central analyzed 245 U.S. locations and found that winter is the fastest-warming season for 76% of these sites, particularly in the Northeast, Southeast, and Ohio Valley. In the western U.S., fall and spring were the fastest-warming seasons for 31 locations, while some West and Northwest areas experienced the most rapid summer warming. These trends contribute to disrupted snowfall, earlier snowmelt, increased wildfire intensity, and longer pest and allergy seasons.

The report details how climate change is increasing the frequency and severity of extreme weather in New Hampshire, leading to significant infrastructure damage and economic losses. It highlights a 12% increase in annual precipitation since 1901, a 2°F rise in average annual temperature since 1971, and a 7-inch rise in sea level since 1950. The document outlines necessary adaptation costs across public health, infrastructure, and local planning to mitigate risks to the state's winter recreation industry, coastal properties, and public school systems.

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.

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.