July 2026 tied with July 2024 as the warmest month ever recorded on Earth, according to NOAA's Global Climate Report. The global surface temperature came in at 2.12°F (1.18°C) above the 20th-century average, and the global ocean surface temperature hit its highest-ever reading for any July. The past four Julys — 2023 through 2026 — now occupy the top four warmest Julys in the entire instrumental record (NOAA, 2026).
The contiguous United States broke its all-time hottest month record, surpassing a mark that had stood since 1936. Nearly 3,000 daily temperature records fell across the country in July alone, with Phoenix hitting 116.9°F and Washington, D.C. reaching 103°F on Independence Day. Philadelphia canceled its Fourth of July parade for the first time in living memory due to temperatures exceeding 100°F (NOAA, 2026; WeatherOnThisDay, 2026).
This is not a one-month blip. The May 2025 through April 2026 period became the warmest 12-month span ever recorded for the contiguous United States. Eight states set statewide April records, three of them breaking marks from 1896. And the forces driving this heat — a developing El Nino, record ocean temperatures, and the long-term warming trend from greenhouse gases — are only intensifying as the year progresses (NOAA, 2026).
Why is 2026 so hot?
Three forces are stacking simultaneously. First, a weak La Nina transitioned to ENSO-neutral conditions in early 2026, and NOAA now projects 82% probability of El Nino by mid-2026 and 96% by winter. El Nino adds warmth to the global atmosphere by releasing heat from the tropical Pacific Ocean. The European Centre for Medium-Range Weather Forecasts (ECMWF) is more aggressive, projecting 100% probability of a Super El Nino by November 2026 (NOAA CPC, 2026; ECMWF, 2026).
Second, global ocean surface temperatures are at record highs. July 2026 marked the first time any July surpassed 1.0°C above the 20th-century average globally. The tropical Pacific, the Atlantic, and the western Mediterranean all showed exceptionally high sea surface temperatures, with marine heatwaves affecting coastal communities worldwide (NOAA, 2026).
Is this climate change, or just El Nino?
Both. El Nino is the natural cycle that makes individual years spike warmer or cooler, but the baseline it is spiking from has shifted dramatically. NASA confirmed that 2024 was the hottest year on record, with 2023 and 2025 essentially tied for second. The 3-year mean from 2023 to 2025 sits at +1.5°C above the 1880-1920 baseline, which is the threshold the Paris Agreement aimed to avoid (Hansen et al., 2025; NASA, 2025).
Climate scientists at Columbia University's Earth Institute project a global temperature record of +1.7°C in 2027, which would provide further confirmation of warming acceleration. The underlying rate of human-caused warming is now estimated at 0.31°C per decade — roughly triple the pace of the late 20th century. Aerosol reductions from cleaner shipping fuel are removing a cooling mask that had been partially hiding the full effect of greenhouse gas accumulation (Hansen et al., 2025).
World Weather Attribution concluded that the March 2026 heat event was 'virtually impossible without climate change,' estimating that human-caused warming added 4.7-7.2°F to observed temperatures. When the natural cycle and the human trend align, as they are now, the result is record-shattering heat that breaks marks by more than tenths of a degree.
What regions are being hit hardest?
North America, Africa, and Asia all experienced their warmest July on record in 2026, according to NOAA. Western Europe endured its hottest June-July period on record, with some countries experiencing their fourth heatwave since May. Météo-France reported that nearly all of France would see temperatures above 35°C (95°F) during the week of August 10, with devastating impacts on agriculture, river transport, and energy infrastructure (WMO, 2026).
In the United States, the heat came in three distinct waves: an East Coast event in late June that shattered records from 1970, a Montana-centered wave that nearly out-scorched Phoenix, and a late-month Southwest dome that pushed Phoenix to 116.9°F. The persistence of high-pressure ridges over the same regions for weeks at a time is a pattern climate models associate with amplified jet-stream waves — and that pattern is expected to continue through August (WeatherOnThisDay, 2026).
What does this mean for the rest of the year?
NOAA's statistical analysis says it is 'very likely' 2026 will rank in the top five warmest years globally. Carbon Brief projects 2026 as the second-warmest year, with a 19% chance of surpassing 2024. James Hansen's team at Columbia goes further, projecting 2026 as likely the warmest year in the period of instrumental data. The wildcard is El Nino timing — if the Super El Nino peaks in late 2026 as ECMWF projects, it will push even more heat into 2027 (Carbon Brief, 2026; Hansen et al., 2025).
The US drought picture is also worsening. January through March 2026 was the driest such period on record for parts of the Southwest, and the hot, dry interior is feeding directly into the 2026 wildfire season. AccuWeather's summer forecast predicts extreme heat concentrated in California, Idaho, Montana, Nevada, Oregon, Utah, Washington, and Wyoming, with the 2026 wildfire season projected to burn 5.5 to 8 million acres (WeatherOnThisDay, 2026).
What can people do about extreme heat?
On the individual level: hydrate aggressively, limit outdoor activity during peak hours (10am-4pm), check on elderly neighbors, and know the signs of heat exhaustion versus heat stroke. Cities like Las Vegas activated cooling stations in early August as temperatures spiked. The National Integrated Heat Health Information System at heat.gov provides real-time guidance and local resources.
On the systemic level, the data is unambiguous: the only durable lever is reducing greenhouse gas emissions. CO2 concentrations have risen from 278 parts per million pre-industrially to about 420 ppm today. The warming acceleration documented by Hansen and colleagues is driven by the interaction of continued fossil fuel emissions with the aerosol masking effect. Every fraction of a degree matters, and every year of delayed action makes the next summer worse.
The record nobody wanted
The ten warmest Julys on record have all occurred since 2016. The past four years — 2023 through 2026 — hold the top four spots. This is not a trend that is ambiguous or contested. The ocean is the hottest it has ever been for July, the atmosphere is the hottest it has ever been for July, and the forces driving it forward are accelerating rather than easing.
The honest reading: the summer of 2026 is a preview of what normal looks like under continued warming. The question is not whether these records will be broken again, but how soon, and how much preparation we do before the next one lands.
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Why is 2026 so hot?
Three forces are stacking: a developing El Nino (82% probability by mid-2026, potentially a Super El Nino by November), record-high global ocean surface temperatures, and the long-term warming trend from greenhouse gases now accumulating at 420 ppm CO2. The result is the hottest July on record globally, tying with 2024.
Is this climate change?
Both natural cycles and human-caused climate change are at work. El Nino adds short-term warmth, but the baseline it spikes from has shifted up by +1.5°C since pre-industrial times. Scientists project 2026 will rank as the second-warmest or warmest year on record, with the underlying warming rate now at 0.31°C per decade — triple the late-20th-century pace.
What can we do about extreme heat?
On the personal level: hydrate, limit outdoor activity during peak hours, check on vulnerable neighbors, and use cooling resources at heat.gov. On the systemic level, the data is clear — reducing greenhouse gas emissions is the only durable lever. CO2 concentrations have risen from 278 ppm pre-industrially to 420 ppm today, and every fraction of a degree of additional warming makes future summers worse.
Bottom line
The honest reading: the summer of 2026 is a preview of what normal looks like under continued warming. The question is not whether these records will be broken again, but how soon, and how much preparation we do before the next one lands.
What we still don't know
This is a fast-moving story. We update the post as new facts land — and we'll flag it when we do.
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