How many days a year does it get that hot — or that cold? Heat days (daily high ≥ 80, 90, 95, 100, or 110 °F) and cold days (daily low ≤ 40, 32, 20, 10, 0, −10, or −20 °F) for every U.S. county, state, and NOAA climate region, from the 1951–2026 nClimGrid record, live through yesterday via URMA. Then, from the 1996–2025 climatology, how many more are expected before year-end. Tap a state to drill in.