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United StatesThe weather in August in Boulder
It's hot in August in Boulder with an average temperature of 30°C. Temperatures this month range from a low of 28°C to a high of 32°C. At night, you can expect temperatures between 14°C and 17°C.
August is an awesome month to be in Boulder for sunny weather. You’ll have high temperatures and not much chance of rain this month.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in August for Boulder, Colorado. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 37°C in 2015, Boulder reached the highest temperature in August over the past 10 years. The lowest daytime temperature in this month was 17°C in 2017. The extreme nighttime temperatures ranged from a lowest recorded value of 7°C to a highest value of 23°C.
Rainfall amount
In August, there is an average of 19 mm of precipitation, spread over 5 days. The wind speed is around 3 Bft, mostly coming from the South.
Daily weather in August for Boulder
Click on any day in August to get detailed info about the usual weather on that day in Boulder. Check out the historical temperatures and precipitation over the past 10 years on this day.
August weather comparison
| Boulder | New York | |
|---|---|---|
| Average temperature | 30°C | 30°C |
| Max. temperature | 32°C | 31°C |
| Min. temperature | 14°C | -5°C |
| Total precipitation | 19 mm | 79 mm |
| Rainy days | 5 days | 13 days |
Start of August
The month of August starts in Boulder with hot temps, averaging around 31°C during the day and nights around 17°C.
Mid August
By mid-August, daytime temps stay steady at around 31°C, with nights around 16°C. Not much precipitation expected during this period. It’s mostly dry and sunny.
End of August
By the end of August, the average daytime temperature in Boulder is around 31°C, while nighttime temps are about 16°C. There’s hardly any chance of precipitation. The weather will be mostly dry with plenty of sun.
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UV index
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Check out the climate of Boulder for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in August in Boulder, Colorado. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in August in Boulder
Temperature in August in Boulder over the years
Precipitation charts
These charts show the average amount of precipitation in August in Boulder, Colorado. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in August in Boulder
Total precipitation in August in Boulder over the years
Daily UV index in August in Boulder
This chart shows the average daily UV index in August in Boulder, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in August in Boulder
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Average weather in Boulder by month
Click on a month below to see detailed weather info for Boulder. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.