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  "path": "/2026/04/21/new-paper-finds-u-s-temperature-extremes-have-declined-since-1899-challenging-assumptions-about-increasing-heatwaves/",
  "publishedAt": "2026-04-21T17:00:00.000Z",
  "site": "https://wattsupwiththat.com",
  "tags": [
    "heat wave",
    "USHCN & GHCN",
    "Weather_stations",
    "Cold waves",
    "Dr. John Christy",
    "U.S. heat waves",
    "USHCN",
    "Weather Stations",
    "New paper: U.S. temperature extremes have declined since 1899, challenging assumptions about increasing heatwaves",
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  "textContent": "The result is simple: both hot and cold extremes have declined over the full period of record.\n\nThe post New paper: U.S. temperature extremes have declined since 1899, challenging assumptions about increasing heatwaves appeared first on Watts Up With That?.",
  "title": "New paper: U.S. temperature extremes have declined since 1899, challenging assumptions about increasing heatwaves"
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