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Is the weather good in USA in August 2025?
Good Weather
☁️
CloudyFor the past few decades, the average daily temperatures in USA during August have been around +86°F.
The weather differs across the USA in August. You may encounter maximum temperatures of +86°F at noon in Phoenix and +75°F in San Diego. So plan your activities, and packing, based on the individual locations rather than the country as a whole.
Temperature, wind and humidity in August
Average
Denver
Honolulu
Las Vegas
Los Angeles
Phoenix
San Diego
San Francisco
Seattle
☀️
+86°F
Avg. max. temperature
+34°F
Min.
+118°F
Max.
31 mm
Total precipitation
59%
Avg. humidity
2 m/s
Avg. wind
11 ☀️
Sunny Days
10 ⛅️
Cloudy
8 🌦
Rainy
Our opinion: USA has good weather in August.
USA in August – what city is the…
- rainiest? Phoenix, with an average of 2 mm of rain and humidity of 34%;
- warmest? Phoenix, with daytime temperatures averaging +106°F;
- windiest? Honolulu, with an average of 5 m/s;
- coolest? San Diego, with daytime temperatures averaging +75°F;
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How good is the weather in USA in August?
During August, the USA usually offers good weather overall, with air pressure around 1014 HPa. This means you may encounter some rainy weather too – August brings around 48 mm of rain and winds averaging 2 m/s. Humidity ranges between 25% in Las Vegas and 83% in San Francisco. In general, it tends to be more humid near the sea and lake and drier inland.
How warm is it in USA during August?
The weather is usually pretty good this time of year, with daytime temperatures around +86°F.
This is how hot it usually is in August
The average daily temperatures above don't tell you everything about how hot it can be in USA. For example, cold nights can make a big difference for those staying in tents or unheated houses. Extra hot days, on the other hand, can make a big difference for those who plan to engage in demanding physical training or competition. So here are some more temperatures for August:
Average
Denver
Honolulu
Las Vegas
Los Angeles
Phoenix
San Diego
San Francisco
Seattle
- Average maximum temperature for the month: +86°F;
- Average minimum temperature for the month: +66°F;
- Highest monthly temperature: +88°F;
- Lowest monthly temperature: +64°F;
Monthly temperatures:
Average
Denver
Honolulu
Las Vegas
Los Angeles
Phoenix
San Diego
San Francisco
Seattle
- Warmest: July with an average +86°F during the day;
- Coldest: January with an average +55°F of the day;
- Hottest month in hottest city: July in Phoenix;
- Coldest month in coolest city: December in Seattle;
Can you swim in USA in August?
Here are the minimum and maximum water temperatures in cities in USA in August:
Honolulu
👙
Warm78°F - 80°F
You can definitely swim in Honolulu in August, with the water temperature of +78°F and up.
Winds in USA during August
Wind speed in USA in August based on historical data:
Average
Denver
Honolulu
Las Vegas
Los Angeles
Phoenix
San Diego
San Francisco
Seattle
August tends to offer light winds averaging 2 m/s. However, coastal cities may experience breezes during the mornings and afternoons.
Comparison between cities in August:
- Highest average wind speed: Honolulu with 4 m/s;
- Lowest average wind speed: Los Angeles with 0 m/s;
- Windiest day of the month: Honolulu with 5 m/s;
- The least windy day of the month: Los Angeles with 0 m/s;
Humidity and precipitation in USA in August
Amount of rainfall in mm during August in USA based on historical data:
Average
Denver
Honolulu
Las Vegas
Los Angeles
Phoenix
San Diego
San Francisco
Seattle
August tends to be a humid month with 61% humidity and 48 mm rainfall
Comparison between cities in August:
Average
Denver
Honolulu
Las Vegas
Los Angeles
Phoenix
San Diego
San Francisco
Seattle
- Highest average rainfall: Phoenix with 51 mm;
- Lowest average rainfall: San Francisco with 1 mm;
- Most number of rainy days: Denver with 15 rainy days;
- Least number of rainy days: San Francisco with 0 rainy days;
- Highest risk of rain during the day: Denver with 48%;
- Least risk of rain during the day: San Francisco with 0%;
- Highest average humidity: San Francisco with 83%;
- Lowest average humidity: Las Vegas with 25%;
Tips for traveling to USA in August
Looking for some tips for traveling to the sun, snow, or whatever you're aiming for USA? Activities, weather, and clothing are closely linked. In addition, it's important to pack only what you really need so you don't have to worry about heavy packing or paying extra baggage fees.
Here is some advice on what to pack and what kind of activities you can do in the USA based on the weather that August is expected to bring. The advice applies to the country as a whole – local weather and possible activities may differ somewhat.
Sunny, mild weather with light winds and high humidity in August
Pack right for August
The weather makes a difference when it comes to packing - especially which items should go in your suitcase. The tips below are designed to help you pack light and right without carrying more than necessary.
- Sunshine does give you a nice color and a boost of vitamin D. However, if you don't have a lot of skin pigment, you should sunbathe carefully to avoid burning yourself, getting sun rash and, in the worst case scenario, skin cancer. This is where sunscreens and opaque clothing work particularly well. Another safe way is to stay in the shade when the sun burns the most, roughly between 9 am and 3 pm.
- Cool weather is between warm and cold. This means you can bring long pants and/or a longer skirt and an extra sweater. Be aware that cool days can alternate with cold nights - it may be wise to also pack a hat, gloves and a scarf.
- Light winds are probably most comfortable in hot weather but is cooling in cool and cold weather. If it is hot (when the air temperature is about 30 degrees), the wind can have a warming effect. A thin, windproof jacket and long trousers help to counteract these effects.
- High humidity means that the air conducts heat to and from the skin more easily. For example, if the air is hot (above skin temperature), it will be harder to stay cool. On the other hand, if the air is cool or cold, it is more difficult to stay warm. In high humidity, the choice of clothing makes less of a difference. However, your physical activity plays a bigger role.
FAQ
Frequently asked questions about the weather in USA in August:
What can you do outside when it's warm in USA?
Bathing and sunbathing can be suitable. Warm (but not hot) days are also good for activities that are not so physically demanding: sightseeing on foot, by boat, on a scooter, camel riding. You can also exercise easily as long as you make sure to cool down and quench thirst.
Is August a good time to visit USA?
August is a really good time to go to USA. The weather is nice so plan your packing around outdoor activities and exploring. Check other months when is a good time to visit USA.
Monthly weather in USA
Source of the data
For this page, we’ve looked at the typical weather in USA, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
