Last updated: February 24, 2025
In August, Hyannis experiences pleasantly warm weather characterized by a maximum temperature of 27°C (81°F) and an average of 22°C (72°F), making it an ideal time for outdoor activities. The minimum temperature rests comfortably at 16°C (61°F). While the area enjoys a moderate humidity level of 76%, residents and visitors alike may encounter occasional rainfall, with precipitation totals reaching 82 mm (3.2 in) over the course of 8 rainy days. Overall, August in Hyannis offers a delightful blend of warmth and summer rains, perfect for beachgoers and nature lovers.
In August, Hyannis experiences its warmest temperatures of the year, with minimums around 16°C (61°F) and averages peaking at 22°C (72°F). The pleasant weather culminates in maximums reaching 27°C (81°F), providing ideal conditions for beachgoers and outdoor enthusiasts alike. This month not only showcases a gradual elevation in temperature as summer reaches its peak but also marks a significant contrast to the frigid conditions of January, where minimums can plunge to -14°C (6°F). As the summer draws to a close, the trend hints at a steady decline in temperatures, making August a prime time to bask in the warmth before the autumn chill sets in.
In August, Hyannis experiences a slight dip in precipitation, with 82 mm (3.2 in) of rain over 8 days—the lowest monthly rainfall total for the summer season. This marks a continuation of the trend from July, where precipitation was also minimal at 83 mm (3.3 in). The summer months generally exhibit lower rainfall compared to the wetter spring and fall periods, with August's totals remaining moderate yet indicative of the transition toward the more rainfall-prone months ahead. As the summer wraps up, locals can expect the humidity to linger, but with less frequent downpours, paving the way for pleasant outdoor activities before the autumn rains set in.
In Hyannis, United States, the humidity levels exhibit a distinct trend throughout the year. Beginning with a high of 84% in both January and February, the temperature begins to mellow as spring approaches, bringing a gradual decrease to 79% in April and further down to 75% in May. As summer rolls in, humidity levels slightly recover, peaking at 78% in June and holding steady at 76% during the height of August. This consistent rate reflects the typical New England summer, where warmth and moisture coexist. As the year transitions into fall, humidity dips once more, settling at 75% in September and maintaining that level through October. Despite the fluctuations, the general pattern shows an overall decline from winter’s chill to the warmth of summer, before dipping again as the seasons change.
In August, Hyannis experiences a UV Index of 9, classifying it as very high and necessitating caution for outdoor activities, with a burn time of just 15 minutes. This trend of heightened UV exposure continues from the previous months of June and July, which also recorded indexes at 10 and 9, respectively. Following a rise in the spring, where the UV index peaked at 8 in April and May, the summer months present some of the most intense sun exposure of the year. As September approaches, the UV levels begin to taper off slightly to an index of 8, but still remain high. To stay informed and safe during this intense summer sun, consider checking the detailed forecast at Hyannis UV Index.
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In August, Hyannis bursts with vibrant sunshine, boasting 330 hours of glorious light that nurtures the summer spirit. This peak in sun-soaked days follows a trend established since June, where daylight progressively amplifies, culminating in the height of summer radiance. The months leading up to August, particularly July, deliver a remarkable 346 hours of sunshine, laying the foundation for beach outings and outdoor adventures. As summer gracefully transitions into early fall with September's 280 hours, the gradual decrease in sunlight evokes a nostalgic warmth, hinting at the seasonal changes ahead. This interplay of light not only defines Hyannis' summer allure but also enriches the coastal community's charm.
In Hyannis, United States, August typically sees a 35% chance of sunny weather, placing it in the midst of a moderately bright summer. This figure notably dips slightly from the previous months of July (37%) and June (38%), reflecting a trend where the likelihood of sun tends to fluctuate during the peak summer months. Interestingly, as summer transitions into fall, September experiences a noticeable increase to 49%, suggesting that the later summer might just deliver more sunny days than its peak. This fluctuation highlights the diverse weather patterns in Hyannis, where the sunny moments can emerge unexpectedly even in August.
In August, Hyannis enjoys a charming 13 hours of daylight, a delightful continuation of the long, sun-drenched days characteristic of summer. This month marks a gradual transition from the peak sunlight of July, which boasts up to 14 hours, signaling the slow return to shorter days as fall approaches. The lingering warmth of summer is palpable as daylight begins to wane, with daylight durations decreasing subtly from this point onward. The trend throughout the year shows a clear rhythm: from 9 hours in the depths of winter to a vibrant 15 hours in June, daylight in Hyannis ebbs and flows, creating a seasonal tapestry that invites both reflection and adventure.
In August, the coastal town of Hyannis experiences its calmest winds of the year, with an average speed of just 4.8 m/s (11 mph). This gentle breeze marks a distinct contrast to the stronger gusts of January through July, where wind speeds hover between 5.2 m/s (12 mph) and 7.2 m/s (16 mph). As summer gives way to fall, wind speeds begin to gradually increase once again, with September's average rising to 5.9 m/s (13 mph), suggesting a return of livelier conditions. This seasonal ebb and flow not only shapes the weather but also influences the activities and vibrancy of Hyannis, offering serene summer days followed by the invigorating breezes of autumn.
The weather in Hyannis changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of August's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Hyannis and find detailed weather information for every month.
August and January present stark contrasts in weather conditions. In August, the temperatures range from a mild 16°C (61°F) at night to a warm 27°C (81°F) during the day, accompanied by an average of 22°C (72°F). While August sees less precipitation at 82 mm (3.2 in) over 8 days, the humidity is relatively high at 76%, creating a warm and sticky atmosphere. In contrast, January is far colder, with temperatures plummeting to a minimum of -14°C (6°F) and averaging just 2°C (36°F), reaching a maximum of only 13°C (55°F). January also has a slightly higher precipitation total of 94 mm (3.7 in) spread over 10 days, with humidity peaking at 84%. For those interested in a detailed look at January weather, visit Hyannis weather in January.
August and February present stark contrasts in weather. In August, temperatures range from a comfortable 16°C (61°F) at night to a warm 27°C (81°F) during the day, with an average of 22°C (72°F). The month experiences 82 mm (3.2 in) of precipitation across about 8 days, combined with a relative humidity of 76%, creating a warm and often humid atmosphere. In contrast, February features much colder temperatures, where the mercury can drop to a minimum of -12°C (10°F) and reach a maximum of just 11°C (53°F), averaging around 2°C (36°F). This winter month is wetter, with precipitation totaling 123 mm (4.8 in) over 12 days and a higher humidity level at 84%. For more on February weather in Hyannis, check out Hyannis weather in February.
August and March showcase distinctly different weather patterns. In August, temperatures range from a mild 16°C (61°F) to a warm 27°C (81°F), creating a pleasant atmosphere with an average of 22°C (72°F). Despite some precipitation totaling 82 mm (3.2 in) over 8 days, humidity remains relatively high at 76%, giving an overall sense of summer warmth. Conversely, March experiences much colder conditions, with temperatures fluctuating between a low of -9°C (16°F) and a high of 13°C (56°F), averaging just 3°C (38°F). However, March sees more significant precipitation at 118 mm (4.7 in) over 10 days, coupled with slightly higher humidity at 82%. For a more detailed look at March weather in Hyannis, check out Hyannis weather in March.
April and August present stark contrasts in weather. In April, temperatures range from a chilly minimum of 1°C (33°F) to a maximum of 16°C (60°F), with an average of only 7°C (46°F). This month experiences more precipitation, totaling 137 mm (5.4 in) over 13 days, and has a humidity level of 79%. In comparison, August offers much warmer temperatures, with a minimum of 16°C (61°F), an average of 22°C (72°F), and a maximum reaching 27°C (81°F). While August does have some rainfall, at 82 mm (3.2 in) over 8 days, it experiences a slightly lower humidity of 76%. For more details about the weather in April, visit Hyannis weather in April.
The weather in August is typically warmer and more stable compared to May. While August boasts an average temperature of 22°C (72°F) with maximum highs reaching 27°C (81°F), May experiences a cooler average of 12°C (53°F) and maximum temperatures only reaching 21°C (70°F). Precipitation in May is also higher, with 119 mm (4.7 in) falling over 12 days, compared to August's 82 mm (3.2 in) over just 8 days. Humidity levels are relatively similar, with both months hovering around 75-76%. For more detailed insights into May weather, check out Hyannis weather in May.
Comparing the weather in August and June reveals distinct differences in temperature and precipitation. In August, temperatures range from a minimum of 16°C (61°F) to a maximum of 27°C (81°F), with an average of 22°C (72°F), making it warmer than June, which has a cooler temperature range of 10°C (51°F) to 24°C (76°F), averaging 17°C (63°F). Although August experiences slightly less precipitation at 82 mm (3.2 in) over 8 days compared to June's 91 mm (3.6 in) over 10 days, both months have relatively high humidity levels, with August at 76% and June at 78%. For more detailed weather information, you can refer to Hyannis weather in June.
Comparing the weather in July and August, both months experience similar temperatures, with August having a slightly warmer average of 22°C (72°F) compared to July's 21°C (71°F). However, July boasts a higher maximum temperature of 29°C (84°F), while August peaks at 27°C (81°F). Precipitation levels are nearly identical, with July receiving 83 mm (3.3 in) over 9 days and August recording 82 mm (3.2 in) over 8 days. Interestingly, both months maintain a consistent humidity of 76%. For more details, you can check out Hyannis weather in July.
In comparing the weather of August and September, August typically offers warmer temperatures, with an average of 22°C (72°F) compared to September's cooler average of 19°C (67°F). While both months experience relatively high humidity, August maintains a slightly higher average at 76%, while September is marginally lower at 75%. Precipitation also increases in September, with 118 mm (4.7 in) over 10 days, compared to August's 82 mm (3.2 in) over 8 days. For a more detailed look at September's weather, you can visit Hyannis weather in September.
In comparing the weather between August and October, August tends to be noticeably warmer, with temperatures ranging from a minimum of 16°C (61°F) to a maximum of 27°C (81°F). The month averages around 22°C (72°F) and experiences relatively lower precipitation at 82 mm (3.2 in) over about 8 days. In contrast, October sees a significant drop in temperatures, with a minimum of 4°C (39°F) and an average of 15°C (59°F), although it can peak at 22°C (72°F) on warmer days. This month also experiences heavier rainfall, totaling 175 mm (6.9 in) across approximately 12 days, accompanied by slightly lower humidity at 75%. For more details on October weather specifics, you can check Hyannis weather in October.
August and November offer a stark contrast in weather. In August, temperatures range from a mild 16°C (61°F) at night to a warm average of 22°C (72°F) during the day, peaking at 27°C (81°F). The month experiences moderate rainfall with 82 mm (3.2 in) over about 8 days and maintains a relatively high humidity of 76%. In contrast, November brings significantly cooler temperatures, with lows plummeting to -6°C (21°F) and an average of just 9°C (48°F), although it can still reach a maximum of 19°C (66°F). Precipitation increases slightly to 102 mm (4.0 in) over 10 days, accompanied by a higher humidity level of 80%. For more detailed insights, check out Hyannis weather in November.
August and December exhibit strikingly different weather patterns. In August, temperatures range from a minimum of 16°C (61°F) to a maximum of 27°C (81°F), with an average of 22°C (72°F), accompanied by a moderate level of humidity at 76%. The month sees about 82 mm (3.2 in) of precipitation over 8 days. In contrast, December brings much colder temperatures, with a minimum of -12°C (11°F) and a maximum of 15°C (60°F), leading to an average of only 4°C (40°F). Precipitation is higher at 136 mm (5.4 in) over 12 days, and the humidity increases slightly to 80%. The notable shift from summer warmth to winter chill marks a significant change in climate between the two months. For more details on December weather, check out Hyannis weather in December.
As summer draws to a close, August in Hyannis offers a warm embrace, with temperatures that often peak pleasantly around 27°C (81°F) while maintaining a comfortable average of 22°C (72°F). This month stands out from others with its combination of higher humidity levels and increased precipitation, recording about 82 mm over roughly eight days. Unlike the cooler spring months or the harsher winters, August invites visitors to enjoy the vibrant coastal life, albeit with a touch of summer rain. For an in-depth look at weather patterns throughout the year, be sure to explore Hyannis Climate.