How hot does the United States get in summer in 2026?

Inland desert cities such as Phoenix, Tucson, and Las Vegas routinely exceed 100°F (38°C) for stretches of summer. The air is dry, so sweat evaporates fast, but cars, asphalt, and west-facing apartments still become dangerous without shade and cooling. That pattern belongs with desert Southwest climate.

The Southeast and Gulf Coast, including Atlanta, Houston, New Orleans, and much of Florida, often sit in the 90s°F (around 32-37°C) with high humidity that makes the same number feel heavier. Overnight lows stay sticky, so bedrooms without air conditioning rarely recover. Florida climate and humidity in the United States cover that sticky half of the map.

Midwest metros such as Chicago, St. Louis, and Kansas City can swing from pleasant evenings into multi-day heat waves with humid air trapped over farmland and city concrete. Coastal California and the Pacific Northwest usually stay cooler near the ocean, while inland valleys (Sacramento, Central Valley, parts of inland Washington and Oregon) still run hot. Compare coasts and inland heat in California climate and California vs Texas.

Air conditioning is not a luxury in Phoenix, Houston, Miami, Austin, or Atlanta summers; it is how daily life works. Many Sun Belt leases assume central AC. Older Northeast or Midwest buildings may have window units or none at all, which turns a heat wave into a sleep crisis on upper floors.

When you view a home, check which rooms cool overnight, whether the unit is landlord-maintained, and how electricity bills spike in July and August. West-facing glass, dark roofs, and weak shade raise the real temperature indoors even when the forecast looks "only" 95°F (35°C). Wildfire smoke can also layer onto Western heat spells; see wildfire smoke.

For city-level tradeoffs that mix heat with jobs and rent, read living in Austin, living in Miami, living in Los Angeles, and where to live in the United States.