Barnstable County (Hyannis)
August
Weather in Barnstable County, Massachusetts for August 2026
Your guide to Barnstable County weather in August - trends and predictions
Small Craft Advisory - See hour by hour.
The forecast for the next days in Barnstable County predicts temperatures to be around 26 °F, close to the historical average.
In general, the average temperature in Barnstable County at the beginning of August is 25.9 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 22 °F by the end of August.
Barnstable County experiences moderate rainfall in August, with an average of 6 rainy days and a total precipitation of 51.7 mm.
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Official Weather Alert ⚠️
Temperatures
Rain 🌧️
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25
Dry days
6
Rainy days
0
Snow days
23°/18°
Temperatures
22 km/h
Avg max wind
78 %
Avg humidity
Barnstable County Weather August
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Temperatures trend during August in Barnstable County
See the weather trend as well as the moving average line
August weather in Barnstable County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Aug. 1 |  Overcast | 24° /18° | 3 mm | 7 | |
| Aug. 2 |  Partly cloudy | 25° /18° | 0.1 mm | 11 | |
| Aug. 3 |  Patchy rain possible | 25° /22° | 13.9 mm | 4.5 | |
| Aug. 4 |  Sunny | 26° /18° | 0.1 mm | 6.8 | |
| Aug. 5 | Partly cloudy | 25° /20° | 5 mm | 6.7 | |
| Aug. 6 | Partly cloudy | 27° /23° | 0.1 mm | 8.9 | |
| Aug. 7 | Sunny | 29° /23° | 0 mm | 7 | |
| Aug. 8 | Partly cloudy | 29° /23° | 0.1 mm | 7 | |
| Aug. 9 | Sunny | 28° /23° | 0.1 mm | 7 | |
| Aug. 10 | Sunny | 26° /21° | 0 mm | 7 | |
| Aug. 11 | Sunny | 27° /21° | 4.5 mm | 7 | |
| Aug. 12 | Sunny | 22° /17° | 4.1 mm | 6 | |
| Aug. 13 | Sunny | 23° /17° | 0 mm | 6 | |
| Aug. 14 | Sunny | 24° /19° | 0.8 mm | 6 | |
| Aug. 15 | Patchy rain possible | 25° /22° | 4 mm | 6 | |
| Aug. 16 | Partly cloudy | 22° /19° | 1.5 mm | 6 | |
| Aug. 17 | Overcast | 27° /18° | 0 mm | 4 | |
| Aug. 18 | Overcast | 21° /17° | 8.1 mm | 10 | |
| Aug. 19 |  Cloudy | 22° /17° | 0 mm | 9 | |
| Aug. 20 | Overcast | 19° /17° | 6.6 mm | 5 | |
| Aug. 21 | Light rain shower | 19° /16° | 25.3 mm | 1 | |
| Aug. 22 | Overcast | 22° /17° | 0 mm | 5 | |
| Aug. 23 | Sunny | 24° /19° | 0 mm | 9 | |
| Aug. 24 | Overcast | 23° /19° | 0 mm | 9 | |
| Aug. 25 |  Fog | 22° /19° | 0 mm | 2 | |
| Aug. 26 | Sunny | 26° /19° | 0 mm | 8 | |
| Aug. 27 | Partly cloudy | 22° /18° | 0 mm | 8 | |
| Aug. 28 | Overcast | 21° /16° | 0 mm | 8 | |
| Aug. 29 | Cloudy | 22° /19° | 0 mm | 7 | |
| Aug. 30 | Partly cloudy | 20° /17° | 3.8 mm | 8 | |
| Aug. 31 | Sunny | 21° /16° | 0 mm | 8 | |
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Important Notice
Our weather forecast for Barnstable County 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 Barnstable County forecast closer to your planned date for the most up-to-date weather information.
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Barnstable County in August - FAQ
What are the expected maximum and minimum temperatures in Barnstable County during August?
During August, expect a variety of temperatures with highs around 23° and lows near 18°, suitable for diverse activities and preferences.
How much rainfall should be expected in Barnstable County during August?
Moderate rainfall is anticipated in Barnstable County during August, with a total of 51.7 mm spread over approximately 6 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Barnstable County during August?
The average wind speed in Barnstable County during August is 22 km/h, suggesting breezy to windy conditions, depending on your activities.
August rainfall patterns in Barnstable County
Explore the daily rainfall trends and prepare for Barnstable Countys August weather 💧
Typically, Barnstable County has 6 rainy days in August with a total of 51.7 mm of rainfall.
UV exposure in Barnstable County during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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Where is Barnstable County?Get accurate weather forecasts for Barnstable County, located at latitude 41.653 and longitude -70.283. Stay updated with localized weather information tailored for Barnstable County.
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