For the first time in 132 years of recorded history, the United States endured a summer that exceeded every prior measure of heat, with the June-through-August period of 2026 averaging 74.4 degrees Fahrenheit nationwide. The record did not arrive alone — drought followed the heat, spreading across nearly three-fifths of the country by early September. What the data describes is not an anomaly but an acceleration, a summer that stands 3.5 degrees above the long average of the 20th century and asks a quiet, urgent question about what summers yet to come will bring.
U.S. records hottest summer ever with temperatures 3.5°F above 20th-century average
Widespread drought affecting agricultural productivity and water availability across 59.1% of the U.S., with particular impact on western and midwestern regions.
Even at night, the heat offered no relief across the entire West.
Mark
So we're talking about the hottest summer in 132 years of records. What does that actually mean for people living through it?
Mimi
It means three and a half degrees hotter than any summer in the entire 20th century. In August alone, daytime highs averaged 88.6 degrees—the highest ever recorded for any August. For people in the West, that's not just uncomfortable; it's dangerous.
Luke
But I want to be careful here. The record was beaten by 0.4 degrees over 1936 and 2021. That's measurable, but it's also tight. How much of this is natural variation versus the longer trend?
Mimi
That's fair. But look at what happened with drought. It expanded to cover 59.1 percent of the country by early September, jumping more than 10 percent in a single month. That's not noise.
Mark
Where did it hit hardest?
Mimi
The West was already in trouble—California, Nevada, New Mexico, Colorado all hit record August temperatures. But the drought spread into the Midwest too, which is unusual and worrying for agriculture.
Luke
The precipitation data is interesting though. Indiana, Kentucky, and Ohio got above-average rain. Some places got record August rainfall. So it's not uniform drought everywhere.
Mimi
Right, but that's almost the problem. You have extreme swings. Record rain in one place, record dryness in another. California had its driest summer since 2002. Texas and Oklahoma nearly hit their record lows for August rain.
Mark
What about nighttime temperatures? That seems like a detail that matters.
Mimi
It does. Even at night, across the entire West—Arizona, California, Colorado, Nevada, New Mexico, Utah—the average lows in August were the highest ever recorded. That means no relief. The heat doesn't break.
Luke
One thing I'd want to know: how much of this is attributable to climate change versus other factors? The report gives us the numbers, but not the mechanism.
Mimi
That's beyond what NOAA's report addresses. But the pattern is clear: we're seeing records fall faster, and the geographic spread is expanding.
The Pulse
- Summer 2026 shattered 132 years of temperature records, with a nationwide average of 74.4°F that surpassed even the brutal heat of 1936 and the record set just five years prior in 2021.
- August delivered the most punishing chapter — daytime highs averaged 88.6°F nationally, while western states including California, Nevada, Colorado, and New Mexico recorded their hottest August temperatures ever measured, including unprecedented overnight lows.
- Rainfall failed to keep pace, leaving the country 0.21 inches below its historical summer average and pushing California to its driest summer since 2002, while Texas and Oklahoma edged toward record-low August precipitation.
- Drought surged in response, expanding by more than 10 percentage points in a single month to blanket 59.1% of the U.S. by early September, pressing deeper into the Midwest and threatening agricultural and water-dependent regions far beyond the already-strained West.
- Modest relief appeared in isolated pockets — Indiana and Ohio saw record August rainfall, and some southwestern and mid-Atlantic drought eased slightly — but the dominant trajectory remained one of widening heat and deepening dryness.
For the first time in 132 years of recorded history, the United States endured a summer that exceeded every prior measure of heat, with the June-through-August period of 2026 averaging 74.4 degrees Fahrenheit nationwide. The record did not arrive alone — drought followed the heat, spreading across nearly three-fifths of the country by early September. What the data describes is not an anomaly but an acceleration, a summer that stands 3.5 degrees above the long average of the 20th century and asks a quiet, urgent question about what summers yet to come will bring.
The summer of 2026 will be remembered as the hottest the United States has ever recorded. From June through August, the national average temperature reached 74.4 degrees Fahrenheit — a threshold never crossed in 132 years of measurement, surpassing the previous records of 1936 and 2021 by four-tenths of a degree.
August alone told a stark story. Average daytime highs reached 88.6 degrees, the warmest ever recorded for any August in the nation's history. The West bore the heaviest burden: California, Nevada, New Mexico, and Colorado each logged their hottest August temperatures on record, and across six southwestern states, nighttime lows reached historic highs. Several states endured record-breaking heat across all three months of the season.
Measured against the full sweep of the 20th century, the departure was not subtle. Summer 2026 ran 3.5 degrees above the historical average — a figure that signals acceleration, not fluctuation.
The heat arrived alongside a rainfall deficit that fed a rapidly expanding drought. The country averaged 8.11 inches of precipitation over the summer, falling short of the historical norm. California recorded its driest summer since 2002. By early September, drought conditions covered 59.1 percent of the United States — more than 10 percentage points higher than at the start of August — spreading from the parched West into the agricultural Midwest. Some corners of the Southwest and mid-Atlantic saw slight easing, but the broader arc was one of expansion, pressing deeper into the regions that feed and water the country.
The summer of 2026 will be remembered as the hottest the United States has ever experienced. Between June and August, temperatures across the country averaged 74.4 degrees Fahrenheit, according to data released by the National Oceanic and Atmospheric Administration. This marks the first time in 132 years of recorded temperature history that a summer has reached this threshold, surpassing the previous records set in 1936 and again in 2021 by four-tenths of a degree.
August alone cemented the record-breaking nature of the season. The month's average temperature reached 75.6 degrees, but the daytime highs told an even starker story—averaging 88.6 degrees, the warmest average high temperature ever recorded for any August in the nation's history. The heat was relentless and widespread. Much of the contiguous United States endured temperatures that ranged from above average to far above average. Only scattered pockets of the Midwest and northern Plains experienced conditions close to normal.
The West bore the brunt of the extreme temperatures. California, Nevada, New Mexico, and Colorado all recorded their warmest August temperatures on record. In California and New Mexico, the average daily highs reached unprecedented levels. Even more striking were the nighttime lows—across Arizona, California, Colorado, Nevada, New Mexico, and Utah, the average minimum temperatures in August were the highest ever measured. Several southwestern states, including Colorado, New Mexico, and Utah, endured record-breaking heat throughout the entire three-month period. Arizona tied its previous record for the warmest summer on record.
When measured against the entire 20th century, the departure from normal was stark. Summer temperatures in 2026 ran 3.5 degrees above the average for the 1900s. August alone was 3 degrees hotter than its historical average. This represents not a marginal shift but a significant acceleration in the warming trend.
The heat came alongside a precipitation pattern that deepened drought across much of the nation. While some regions—Indiana, Kentucky, and Ohio—received above-average rainfall, and August brought record precipitation to Indiana and Ohio, the national picture was one of deficit. The country received an average of 8.11 inches of rain between June and August, falling 0.21 inches short of the 20th-century average. California experienced its driest summer since 2002 and its fifth-driest on record. Texas and Oklahoma came close to their record lows for August precipitation.
The drought expanded dramatically as summer progressed into fall. By the start of September, drought conditions covered 59.1 percent of the United States, an increase of more than 10 percentage points since the beginning of August. While the drought remained concentrated in western areas that had already been struggling with water scarcity, it spread further into the middle of the country, reaching into regions that had previously been spared. Some relief came to parts of the Southwest, Southeast, and mid-Atlantic, where drought conditions weakened slightly, but the overall trajectory was one of expansion and deepening severity across the nation's agricultural heartland and water-dependent regions.
Notable Quotes
Much of the contiguous U.S. endured above- to much-above average temperatures last month, with the only normal conditions isolated to pockets of the Midwest and northern Plains.— National Oceanic and Atmospheric Administration report
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