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Weather in Boulder for August 2025

Your guide to Boulder weather in August - trends and predictions

    Temperatures

  • In general, the average temperature in Boulder at the beginning of August is 31.9 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 27.4 °F by the end of August.

  • Rain 🌧️

  • Boulder in August brings notable rainfall, with an average of 16 rainy days and a total precipitation of 32.4 mm.

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Average dry days
15
Dry days
Average rainy days
16
Rainy days
Average snowy days
0
Snow days
Average temperatures
28°/16°
Temperatures
Average wind speed
17 km/h
Avg max wind
Average humidity
42 %
Avg humidity

Boulder Weather August

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Temperatures trend during August in Boulder

See the weather trend as well as the moving average line

August weather day by day

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Date Weather Temperatures Rain UV More
Aug. 1 Sunny
Sunny
33° /17° 0 mm 8
Aug. 2 Moderate rain at times
Moderate rain at times
31° /18° 0.7 mm 7
Aug. 3 Sunny
Sunny
33° /17° 0 mm 8
Aug. 4 Cloudy
Cloudy
34° /19° 0 mm 7
Aug. 5 Patchy rain possible
Patchy rain possible
31° /19° 0.6 mm 7
Aug. 6 Moderate rain at times
Moderate rain at times
30° /17° 0.6 mm 7
Aug. 7 Moderate rain at times
Moderate rain at times
31° /19° 3.2 mm 7
Aug. 8 Patchy rain possible
Patchy rain possible
17° /14° 1.2 mm 4
Aug. 9 Moderate or heavy rain shower
Moderate or heavy rain shower
18° /12° 6.5 mm 4
Aug. 10 Partly cloudy
Partly cloudy
24° /13° 0.4 mm 6
Aug. 11 Overcast
Overcast
28° /15° 0 mm 6
Aug. 12 Patchy rain possible
Patchy rain possible
25° /17° 0.1 mm 6
Aug. 13 Moderate or heavy rain shower
Moderate or heavy rain shower
25° /15° 2.2 mm 6
Aug. 14 Patchy rain possible
Patchy rain possible
26° /14° 1.6 mm 6
Aug. 15 Partly cloudy
Partly cloudy
26° /13° 0.3 mm 7
Aug. 16 Sunny
Sunny
31° /15° 0.2 mm 8
Aug. 17 Overcast
Overcast
33° /16° 0 mm 7
Aug. 18 Overcast
Overcast
31° /17° 0.1 mm 7
Aug. 19 Heavy rain at times
Heavy rain at times
28° /17° 1.1 mm 6
Aug. 20 Partly cloudy
Partly cloudy
31° /16° 0 mm 8
Aug. 21 Moderate or heavy rain shower
Moderate or heavy rain shower
29° /18° 5.3 mm 6
Aug. 22 Patchy rain possible
Patchy rain possible
25° /17° 0.7 mm 6
Aug. 23 Moderate rain at times
Moderate rain at times
25° /15° 1.5 mm 6
Aug. 24 Overcast
Overcast
28° /16° 0 mm 6
Aug. 25 Moderate or heavy rain shower
Moderate or heavy rain shower
28° /17° 5.8 mm 6
Aug. 26 Partly cloudy
Partly cloudy
27° /16° 0.3 mm 7
Aug. 27 Cloudy
Cloudy
27° /14° 0 mm 6
Aug. 28 Partly cloudy
Partly cloudy
29° /14° 0 mm 7
Aug. 29 Partly cloudy
Partly cloudy
27° /16° 0 mm 7
Aug. 30 Sunny
Sunny
26° /12° 0 mm 7
Aug. 31 Sunny
Sunny
28° /16° 0 mm 7
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Important Notice
Our weather forecast for Boulder in August is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Boulder forecast closer to your planned date for the most up-to-date weather information.

Boulder in August - FAQ

What are the expected maximum and minimum temperatures in Boulder during August?
During August, expect a variety of temperatures with highs around 28° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Boulder during August?
In August, Boulder can expect light to moderate rainfall, totaling 32.4 mm across approximately 16 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Boulder during August?
The average wind speed in Boulder during August is 17 km/h, suggesting breezy to windy conditions, depending on your activities.

August rainfall patterns in Boulder

Explore the daily rainfall trends and prepare for Boulders August weather 💧

UV exposure in Boulder during August

Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️

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Location coordinates Where is Boulder?

Get accurate weather forecasts for Boulder, located at latitude 40.015 and longitude -105.271. Stay updated with localized weather information tailored for Boulder.

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