A 132-year national record
NOAA’s National Centers for Environmental Information calculated a July average temperature of 76.9°F across the contiguous United States. That was 3.3°F above the 20th-century average and made July 2026 the hottest month in the national record dating to 1895.
- 76.9°F
- July U.S. average
- 64.2°F
- average overnight low
- 50 states
- at least 1°F above average
Why the warm nights matter
July’s average overnight low of 64.2°F was also the highest for any month in the national record. Warm nights reduce the time people, buildings and pavement have to cool down. That can increase heat stress during a multi-day hot spell, especially for older adults, outdoor workers and people without reliable air conditioning.
Where heat may continue in late August
NOAA’s Climate Prediction Center identifies an ongoing Southern U.S. heat wave and a risk of rapid-onset drought. Its August 13 hazards outlook places parts of the Central and Southern Plains and Lower Mississippi Valley at risk for extreme heat beginning around August 21, with a broader heat risk extending into the August 21–27 period. Some locations may experience heat-index values above 110°F.
An outlook identifies areas where hazardous heat is favored; it is not a local warning. Exact temperatures, timing and alerts should be checked by location.
Official sources
- NOAA NCEI: July 2026 National Climate Report
- NOAA CPC: U.S. Hazards Outlook
- NOAA CPC: 8–14 Day Outlook
MyUSA.us summarizes official public information in plain language. Always follow current NWS watches and warnings for your location.
Page reviewed: August 13, 2026