Last updated: February 24, 2025
In August, Deer Isle, United States, experiences a delightful mix of summer warmth and coastal charm. Maximum temperatures reach a pleasant 23°C (73°F), while the average settles at a comfortable 18°C (64°F), making it an ideal time for outdoor activities. Nights cool down with a minimum of 13°C (57°F), providing refreshing respite from daytime heat. Despite some cloudy days, the region receives a moderate precipitation total of 86 mm (3.4 in) over approximately 8 days, contributing to lush landscapes. With humidity levels hovering around 74%, visitors can expect a typical yet invigorating summer experience enriched by the island's natural beauty.
In August, Deer Isle enjoys a welcoming warmth that marks the peak of its summer season. With minimum temperatures around 13°C (57°F) and average highs reaching 23°C (73°F), the island's climate is pleasantly mild, making it an ideal time for outdoor activities and exploration. Compared to the frigid depths of winter, where temperatures plummet to -17°C (2°F) in January, August's balmy weather is a refreshing contrast. This seasonal transition is evident as the island experiences a steady rise from the previous months, with July's averages just shy of August's. As summer begins to wane, the gentle warmth of August fosters an inviting atmosphere, perfect for soaking in the natural beauty and vibrant community life that Deer Isle has to offer.
In August, Deer Isle experiences moderate precipitation, totaling 86 mm (3.4 in) over just 8 days. This marks a slight decrease from the wetter months of spring and early summer, with July's average at 92 mm. The trend suggests a gradual tapering off of rain as the region transitions toward fall, following a peak in April with 157 mm. With only eight days of rain, August offers a brief respite before the precipitation levels begin to climb again in September, when 102 mm is recorded. This interplay of water and warmth sets the stage for a beautiful, albeit sometimes unpredictable, late summer in Deer Isle.
In August, Deer Isle experiences a humidity level of 74%, consistent with the lower humidity seen from June through July. This period marks a notable dip compared to the year's peak months earlier in the year, such as January and February when humidity hovers around a high 88%. As summer transitions toward fall, humidity begins to rise slightly in September, climbing to 77%, before gradually increasing through the autumn months. This overall trend showcases Deer Isle's shift from the damp winter months to a more comfortable summer atmosphere, making August an ideal time for those seeking milder humidity while enjoying the beauty of the coastline.
In Deer Isle, August marks a notable shift in UV Index levels, landing at 8, which is categorized as very high. This trend continues from the previous months, where June and July also reported a UV Index of 9. As summer peaks, residents and visitors should be vigilant, as the burn time decreases to just 15 minutes under the intense sun. Compared to earlier months, where the UV Index started at a modest 2 in January and gradually climbed, August stands as a reminder of the sun's strength, emphasizing the importance of sun protection. For those looking to enjoy the outdoors, awareness of the UV Index, such as this month's reading, is essential for safe sun exposure. For more detailed information, check out Deer Isle UV Index.
UV Risk Categories
In August, Deer Isle basks in the glow of 325 hours of sunshine, marking it the sunniest month of the year. This radiant peak follows a steady ascent from the brisk 143 hours in January, with sunshine gradually increasing as the seasons shift. The warm spring months of March and April witness a delightful buildup, culminating in June and July, where daylight reaches a near-summit with over 316 hours of sunlight. As autumn approaches, however, the hours take a gentle decline, dropping to 278 in September and continuing downward into the cooler months. This trend showcases the island's captivating transition from the vibrant, sun-soaked days of summer to the quieter, more subdued light of fall, making August a truly cherished moment in Deer Isle's annual cycle.
In Deer Isle, August typically brings a low chance of sunny weather, with only 29% of the month likely to be sun-soaked. This marks a notable decline from the more optimistic sun probabilities seen earlier in the year, particularly March, which boasts a 55% chance. As summer unfolds, the chances decrease, with July seeing the lowest likelihood at just 26%. However, there’s a slight uptick in sunny prospects as the seasons transition into September, where the chances rise to 42%. Overall, August's cooler summer vibe makes it one of the less sunny months, encouraging visitors to embrace the island’s beauty even when the sun isn’t shining brightly.
As summer wanes in August, Deer Isle experiences a gradual decline in daylight, boasting around 13 hours of golden sunshine—a notable shift from the peak of summer when the days stretched to 15 hours in June and July. This month marks a transition, hinting at the approaching autumn as daylight diminishes steadily. Following the vibrant lengths of daylight in the preceding months, August's 13 hours serves as a reminder that while summer is fading, the beauty of nature continues to thrive in the changing light. This trend of decreasing daylight will continue into September and October, where daylight hours will drop further, eventually culminating in the crisp, shorter days of winter.
August in Deer Isle brings a gentle respite in wind activity, with average speeds dipping to 4.2 m/s (9 mph), the calmest of the year. This trend of decreasing wind speeds is evident as summer progresses, following a peak in March at 7.7 m/s (17 mph). As the warmer months of June and July usher in milder breezes, August's softness marks a transition toward the breezy autumn months ahead. Notably, September sees a slight uptick in wind, rising to 5.4 m/s (12 mph), as the weather begins to cool and prepares for the more vigorous winds of fall and winter. The progression from the brisk early year winds to the tranquil August air reflects the shifting rhythms of nature in this picturesque coastal region.
The weather in Deer Isle 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 Deer Isle and find detailed weather information for every month.
The weather in August and January offers a striking contrast in terms of temperature and conditions. August sees milder temperatures ranging from a minimum of 13°C (57°F) to a maximum of 23°C (73°F), accompanied by a relatively high humidity level of 74%. In contrast, January experiences frigid conditions with temperatures plummeting to a minimum of -17°C (2°F) and maxing out at just 10°C (50°F), alongside even higher humidity at 88%. While August has a total precipitation of 86 mm (3.4 in) over 8 days, January receives slightly more, with 108 mm (4.3 in) of precipitation spread over 9 days. For more information about January weather, you can visit Deer Isle weather in January.
August and February present a striking contrast in weather patterns. August enjoys milder temperatures, with averages around 18°C (64°F) and maximums reaching 23°C (73°F), accompanied by lower humidity levels at 74%, while experiencing about 86 mm (3.4 in) of precipitation over approximately 8 days. In contrast, February is marked by much colder conditions, with average temperatures plummeting to -1°C (30°F) and lows dipping to a chilling -15°C (6°F). The month also sees higher precipitation of 105 mm (4.1 in) over about 11 days, coupled with increased humidity levels at 88%. For a detailed look at the winter weather, you can visit Deer Isle weather in February.
August and March present contrasting weather experiences. In August, temperatures range from a mild 13°C (57°F) at night to a comfortable high of 23°C (73°F) during the day, with an average temperature of 18°C (64°F). However, it also sees some rainfall, with 86 mm (3.4 in) of precipitation over about 8 days and a humidity level of 74%. In contrast, March feels much colder, with temperatures ranging from a frigid -15°C (6°F) to a maximum of only 10°C (50°F) and an average of 0°C (33°F). The precipitation level is slightly lower at 84 mm (3.3 in) but occurs over 9 days, with higher humidity at 85%. For more insights on the chilly March climate, you can check Deer Isle weather in March.
When comparing the weather in August and April, it’s clear that August experiences milder temperatures, with minimums around 13°C (57°F) and maximums reaching up to 23°C (73°F), while April has significantly cooler temperatures, ranging from a minimum of -3°C (27°F) to a maximum of 14°C (57°F). Precipitation is also noteworthy; August sees 86 mm (3.4 in) over 8 days, whereas April is wetter, with 157 mm (6.2 in) spread across 13 days. Additionally, humidity levels are slightly higher in April at 81%, compared to 74% in August. For those interested in more detailed insights, you can check out Deer Isle weather in April.
When comparing the weather in August to May, it's evident that August is significantly warmer, with average temperatures ranging from a minimum of 13°C (57°F) to a maximum of 23°C (73°F), in contrast to May's cooler temperatures, which range from 2°C (37°F) to 17°C (64°F). Precipitation levels are slightly lower in August, totaling 86 mm (3.4 in) over about 8 days, compared to May’s 105 mm (4.1 in) across 11 days. Humidity is somewhat similar in both months, with August at 74% and May at 76%, suggesting that while August feels warmer, both months can be quite humid. For a detailed look at May's weather specific to the region, visit Deer Isle weather in May.
In comparing the weather of June and August, it is clear that August tends to be warmer, with average temperatures reaching 18°C (64°F) compared to June's average of 13°C (56°F). While both months experience similar levels of precipitation—August sees 86 mm (3.4 in) over 8 days, and June has 87 mm (3.4 in) over 9 days—the slightly higher temperatures in August create a more pleasant atmosphere. Humidity levels remain consistent at 74% for both months, resulting in a similar feel in terms of moisture in the air. For more detailed information, you can refer to Deer Isle weather in June.
In comparing the weather of August and July, August tends to be slightly warmer, with an average temperature of 18°C (64°F) compared to July's 16°C (62°F). The maximum temperature in August reaches 23°C (73°F), while July has a peak of 22°C (72°F). Precipitation levels are quite similar, with August receiving 86 mm (3.4 in) over 8 days, just slightly less than July's 92 mm (3.6 in) over 10 days. Both months share the same humidity level of 74%, making them equally humid. For more detailed insights on July's weather, you can check out Deer Isle weather in July.
In August, temperatures are generally warmer, ranging from a minimum of 13°C (57°F) to a maximum of 23°C (73°F), with an average of 18°C (64°F). The month experiences around 86 mm (3.4 in) of precipitation over 8 days, and humidity levels are relatively comfortable at 74%. In contrast, September sees a drop in minimum temperatures to 9°C (48°F) and an average temperature of 16°C (60°F), while maximum temperatures reach up to 22°C (72°F). Although September has slightly higher precipitation at 102 mm (4.0 in) over the same number of days, humidity increases modestly to 77%. For more detailed weather insights, check out Deer Isle weather in September.
August typically offers milder conditions with an average temperature of 18°C (64°F), while October sees a notable drop, with an average of just 12°C (54°F). In August, you can expect relatively less rain, averaging 86 mm over 8 days, as opposed to the wetter October, which experiences about 145 mm of precipitation over 12 days. Additionally, October brings higher humidity levels at 82%, compared to August's 74%. For a detailed outlook on October weather, you can visit Deer Isle weather in October.
August presents a mild and pleasant climate, with average temperatures around 18°C (64°F) and maximums reaching up to 23°C (73°F). The month experiences moderate precipitation, totaling 86 mm (3.4 inches) over about 8 days. In contrast, November brings a significant drop in temperatures, with averages plummeting to 6°C (43°F) and minimums reaching as low as -11°C (13°F). This month is also wetter, receiving 138 mm (5.4 inches) of rain over approximately 12 days, and the humidity increases to 85%. For more detailed insights, you can visit Deer Isle weather in November.
The weather in August is notably milder than in December, with average temperatures ranging from a minimum of 13°C (57°F) to a maximum of 23°C (73°F), while December brings much colder conditions with an average of just 1°C (34°F) and lows plummeting to -17°C (2°F). August experiences 86 mm (3.4 in) of precipitation over approximately 8 days, whereas December sees significantly more rain and snow, totaling 155 mm (6.1 in) across around 12 days. Furthermore, humidity is slightly lower in August at 74%, compared to December, which has a higher humidity level of 84%. For more detailed information on December conditions, you can visit Deer Isle weather in December.
In August, Deer Isle experiences a delightful shift in weather, where mild temperatures create an inviting atmosphere for outdoor activities. The average warmth fosters a pleasant summer vibe, making it a perfect time to explore the island's natural beauty. While some days may bring a light shower, the overall humidity enhances the lush surroundings. Compared to the earlier summer months, August offers a more balanced climate, allowing visitors to enjoy the best of both sun and occasional rain. For a comprehensive overview of the area's meteorological patterns, visit Deer Isle Climate.