Temperatures in August
It's warm in August in Boulder with an average temperature of 27°C. Temperatures this month range from a low of 24°C to a high of 28°C. At night, you can expect temperatures between 7°C and 11°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Boulder in August. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of August
The month of August starts in Boulder with hot temperatures, averaging around 28°C during the day and nights close to 10°C. There’s little chance of precipitation. The weather is mostly sunny and dry.
Mid-August
By mid-August, the average daytime temperature drops to around 27°C, with nights close to 9°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
End of August
By the end of August, the average daytime temperature in Boulder will be around 27°C, with nights close to 8°C. Barely any chance of precipitation. The weather will mostly be dry with lots of sunshine.
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Precipitation in August
In August, there is an average of 56 mm of precipitation, spread over 8 days. The wind speed is around 4 Bft, mostly coming from the West.
The average precipitation chance is 25% per day this month. Though it seems pretty low, the weather’s variable. Some days have higher and others lower precipitation chances, which lowers the average.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in August for Boulder. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Boulder in August |
London | ||
|---|---|---|---|
 Average Temperature |
27°C | 22°C | |
 High Temp |
28°C | 24°C | |
| Low Temp |
24°C | 19°C | |
 Total Precipitation |
56 mm | 60 mm | |
| Rainy Days |
8 days | 10 days | |
July
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.
Is August a good time to visit Boulder?
Want nice weather? Then August is a great time to be in Boulder. You’ll have pleasant temperatures and not too much rain this month.
Temperature records for Boulder in August
With 34°C, Boulder hit the highest temperature in the last 10 years in August 2020. The lowest daytime temperature in this month was 14°C in 2016. The extreme night temperatures ranged from a low of 0°C to a high of 14°C.
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Daily Temperature in August in Boulder
This chart shows the average daily temperatures, both day and night, for each day in August in Boulder, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in August in Boulder
The chart below shows the average daily precipitation in August for Boulder, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for August, you can expect around 8 days of rain in Boulder.
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.
Temperature in August in Boulder Over the Years
This chart shows the average temperature in August in Boulder, measured in degrees Celsius, over the past years.
Total Precipitation in August in Boulder Over the Years
This chart shows the average precipitation in August in Boulder, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in August for Boulder
Click on a specific day in August for detailed info on the typical weather on that day in Boulder. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in August in Boulder
Have you been to Boulder in August?
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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.
