USA weather in August is very warm and you’ll need to pack a few extra bottles of sunscreen to help deal with the sun. The climate is even hotter in places like Las Vegas and Phoenix, where temperatures can reach the high thirties at peak times of the day. The average Low Temperature & average high Temperature for the month of August is 80 to 90 degrees Fahrenheit (27 to 32 degrees Celsius).
August temperatures were above average across the West Coast, Southwest, and from the Plains to the East Coast. Vermont and New Hampshire both had their warmest August on record while Maine and Massachusetts ranked second warmest. Much of the above-average warmth can be attributed to warm overnight temperatures. Temperatures were near to below average across much of the northern Rockies and the southern Plains.
Average Low & High Temperature of US August
| High °F | Low °F | City | High °C | Low °C |
|---|---|---|---|---|
| 89 | 71 | Atlanta, Georgia | 32 | 22 |
| 98 | 75 | Austin, Texas | 37 | 24 |
| 87 | 66 | Baltimore, Maryland | 30 | 19 |
| 91 | 71 | Birmingham, Alabama | 33 | 22 |
| 80 | 65 | Boston, Massachusetts | 27 | 18 |
| 79 | 62 | Buffalo, New York | 26 | 17 |
| 89 | 69 | Charlotte, North Carolina | 31 | 20 |
| 83 | 67 | Chicago, Illinois | 28 | 19 |
| 85 | 65 | Cincinnati, Ohio | 30 | 18 |
| 82 | 64 | Cleveland, Ohio | 28 | 18 |
| 84 | 64 | Columbus, Ohio | 29 | 18 |
| 97 | 77 | Dallas, Texas | 36 | 25 |
| 88 | 57 | Denver, Colorado | 31 | 14 |
| 81 | 63 | Detroit, Michigan | 27 | 17 |
| 83 | 62 | Hartford, Connecticut | 29 | 17 |
| 94 | 77 | Houston, Texas | 34 | 25 |
| 84 | 65 | Indianapolis, Indiana | 29 | 18 |
| High °F | Low °F | City | High °C | Low °C |
|---|---|---|---|---|
| 91 | 76 | Jacksonville, Florida | 33 | 25 |
| 87 | 66 | Kansas City, Missouri | 31 | 19 |
| 103 | 81 | Las Vegas, Nevada | 39 | 27 |
| 84 | 65 | Los Angeles, California | 29 | 19 |
| 88 | 70 | Louisville, Kentucky | 31 | 21 |
| 92 | 73 | Memphis, Tennessee | 33 | 23 |
| 91 | 78 | Miami, Florida | 33 | 25 |
| 80 | 64 | Milwaukee, Wisconsin | 27 | 18 |
| 81 | 63 | Minneapolis, Minnesota | 27 | 17 |
| 90 | 69 | Nashville, Tennessee | 32 | 21 |
| 91 | 77 | New Orleans, Louisiana | 33 | 25 |
| 83 | 69 | New York, New York | 29 | 21 |
| 92 | 69 | Oklahoma City, Oklahoma | 33 | 21 |
| 92 | 75 | Orlando, Florida | 33 | 24 |
| 86 | 68 | Philadelphia, Pennsylvania | 30 | 20 |
| 105 | 84 | Phoenix, Arizona | 41 | 29 |
| 82 | 62 | Pittsburgh, Pennsylvania | 28 | 17 |
The tables give the normals for maximum and minimum temperatures based on weather data collected from 1981 to 2010 by the NOAA National Climatic Data Center of the United States.
In the month of August, the weather is perfect in the United States, but only in a few cities: in Hollywood, Santa Monica, Napa Valley, San Francisco, Moab, Seattle, Santa Barbara, Salem, Reno, Los Angeles (California), San Diego, Portland, Salt Lake City, and Lake Tahoe. In these places, all the conditions are met for enjoying a maximum trip: the sun is guaranteed, precipitations are scarce and the humidity is not too high. It is, therefore, the ideal month to visit these cities!