Hottest US Cities in Summer
Two of the 40 largest cities in the United States, Phoenix, Arizona and Las Vegas, Nevada, stand out as consistently having very hot weather during the summer months of June, July and August. They and eight other major cities have average daily temperatures above 80 °F (26.7 °C) during that time of year.
| City | Daily Summer Mean °F |
|---|---|
| Phoenix, Arizona | 92.6 |
| Las Vegas, Nevada | 88.7 |
| Tucson, Arizona | 85.2 |
| Dallas - Fort Worth, Texas | 83.4 |
| San Antonio, Texas | 83.3 |
| Austin, Texas | 83.2 |
| Houston, Texas | 82.7 |
| El Paso, Texas | 82.2 |
| Memphis, Tennessee | 80.8 |
| Jacksonville, Florida | 80.5 |
Hottest Days
During summer months, 13 of the largest US cities routinely get above 90 °F (32.2 °C) each day, including two cities where temperatures top 100 °F (37.8 °C) on a typical summer day.
| City | Average Daily Maximum °F |
|---|---|
| Phoenix, Arizona | 105.0 |
| Las Vegas, Nevada | 101.6 |
| Tucson, Arizona | 99.1 |
| Fresno, California | 94.1 |
| El Paso, Texas | 93.9 |
| Austin, Texas | 93.8 |
| Dallas - Fort Worth, Texas | 93.8 |
| San Antonio, Texas | 93.6 |
| Houston, Texas | 92.6 |
| Oklahoma City, Oklahoma | 90.9 |
| Memphis, Tennessee | 90.6 |
| Albuquerque, New Mexico | 90.5 |
| Sacramento, California | 90.4 |
Warmest at Night
Some American cities don't cool down much at night. For ten of the country's 40 largest cities, temperatures, on average, don't drop below 70 °F (21.1 °C) during summer.
| City | Average Daily Minimum °F |
|---|---|
| Phoenix, Arizona | 80.0 |
| Las Vegas, Nevada | 75.7 |
| Dallas - Fort Worth, Texas | 73.1 |
| San Antonio, Texas | 73.1 |
| Houston, Texas | 72.8 |
| Austin, Texas | 72.6 |
| Jacksonville, Florida | 71.3 |
| Tucson, Arizona | 71.3 |
| Memphis, Tennessee | 71.0 |
| El Paso, Texas | 70.3 |
