Last updated: February 24, 2025
August weather on Shelter Island, United States offers a delightful mix of warmth and moisture, with maximum daily temperatures reaching up to 27°C (80°F) and an average of 23°C (73°F). Nighttime provides a cooler respite with lows averaging 17°C (63°F). This month sees about 103 mm (4.0 in) of rainfall spread over 9 days, contributing to the island's lush environment. The humidity hovers around a comfortable 76%, ensuring that visitors can enjoy the balmy climate while exploring the natural beauty of this coastal gem.
August on Shelter Island is a delightful culmination of summer warmth, with temperatures peaking at an inviting 27°C (80°F). This month showcases a smooth transition from the cooler July averages, where 22°C (72°F) marked pleasant days, to the embrace of late summer heat. Evenings begin to cool slightly, with lows around 17°C (63°F), ensuring comfortable nights. The average temperature rests comfortably at 23°C (73°F), positioning August as one of the most favorable months for outdoor activities and beach outings. As the season winds down, the warmth of August offers a perfect backdrop for enjoying the vibrant island life before the cooler autumn months set in.
In August, Shelter Island experiences a modest precipitation of 103 mm (4.0 in), marking a slight increase from the previous month. With nine days of rain, it maintains a steady pattern similar to the summer months, where precipitation tends to fluctuate between 72 mm (2.9 in) in June and 99 mm (3.9 in) in July. This consistent rainfall during late summer supports the lush greenery of the island, while also hinting at a transition as the region approaches the wetter months ahead. Looking ahead to September, precipitation levels are expected to remain similar, reflecting a stable maritime climate that continues to nourish the island’s vibrant ecosystem.
In August, Shelter Island experiences a humidity level of 76%, maintaining a trend established during the summer months. Throughout the year, humidity remains relatively high, peaking at 84% in both January and February. As spring transitions into summer, humidity levels gradually decrease, hitting their lowest point of 75% in May and September. This consistent pattern indicates a warm, humid climate, typical for coastal regions, with only slight fluctuations as the seasons change. As the summer comes to a close, August's humidity mirrors that of July, showcasing a stable yet comfortable atmosphere for residents and visitors alike.
In August, Shelter Island experiences a UV Index of 9, classified as very high, requiring just 15 minutes of exposure before the risk of sunburn increases significantly. This trend mirrors the peak UV levels observed in June and July, where the index reached its maximum of 10. Following closely, August maintains these elevated levels, making it essential for residents and visitors alike to take necessary precautions against harmful UV rays. As summer begins to wane, the UV Index gradually declines, hinting at a decrease in sun intensity heading into September. For a comprehensive overview of UV exposure and safety tips, check out the full details at Shelter Island UV Index.
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August in Shelter Island brings a radiant peak of sunshine, with 327 hours basking the area in warmth and light. This month continues the trend established in the summer, where sunlight reaches its zenith in July with 349 hours, creating a vibrant atmosphere perfect for outdoor activities and beach excursions. As summer wanes, August still holds a generous amount of sunshine, though a slight dip reflects the transition toward fall. Compared to the cooler months, where sunlight averages between 153 to 291 hours, the summer months create a striking contrast, enticing visitors and residents alike to soak in the brilliance before the shorter days of autumn set in. Overall, August embodies the lingering warmth of summer, leaving a golden hue on Shelter Island as the seasons shift.
In Shelter Island, August presents a notably lower chance of sunny weather, with only a 35% likelihood of sunshine. This dip follows a relatively stable trend observed during the summer months, where July and June both hover around 41% and 45%, respectively. In contrast, early spring shows a brighter disposition, with March offering the highest chance at 59%. As summer transitions into fall, the returning months see a more promising forecast, with September rebounding back to a 49% chance of sunshine. This fluctuation in weather patterns illustrates the varying degrees of sun throughout the year, emphasizing that while August may not shine as brightly, the promise of sunnier days lies just around the corner.
In August, Shelter Island enjoys approximately 13 hours of daylight, marking a slight decrease from the peak of 15 hours reached in June and July. This gradual decline is part of a broader trend as summer transitions into fall. Following the vibrant long days of late spring and summer, August's daylight serves as a gentle reminder of the impending autumn, with daylight hours steadily decreasing to 12 in September and further down to 11 in October. Visitors to the island can relish the warm August light, but should also prepare for the cozy, shorter days that lie ahead as the year progresses.
In August, Shelter Island experiences a slight uptick in wind speed, averaging 4.9 m/s (11 mph), just above the calm winds of July. This marks a gradual decline in wind intensity from the 7.3 m/s (16 mph) of January and February, showcasing a seasonal shift towards calmer summer months. As the year progresses, September brings a refreshing increase to 6.1 m/s (14 mph), indicating a transition as summer wanes and autumn approaches. The overall trend suggests that summer months typically feature the lightest winds, while the late year months boast a steady return to more brisk breezes, creating a dynamic and ever-changing atmosphere throughout Shelter Island's year.
The weather in Shelter Island 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 Shelter Island and find detailed weather information for every month.
The weather in August and January presents a stark contrast in climate. August boasts mild temperatures with a minimum of 17°C (63°F) and an average of 23°C (73°F), peaking at a maximum of 27°C (80°F). It's a month characterized by considerable humidity at 76%, along with an average precipitation of 103 mm (4.0 in) over about 9 days. In sharp contrast, January experiences much colder conditions, with temperatures ranging from a minimum of -13°C (8°F) to a maximum of 13°C (56°F), averaging around 2°C (37°F). While January sees slightly less precipitation at 89 mm (3.5 in) over the same number of days, the humidity is higher at 84%. For more insights, you can check Shelter Island weather in January.
August and February offer starkly contrasting weather experiences. In August, temperatures range from a mild 17°C (63°F) to a warm 27°C (80°F), with an average of 23°C (73°F), making it a pleasant summer month. However, it also sees considerable humidity at 76% and 103 mm (4.0 in) of precipitation over about 9 days. In contrast, February is characterized by much colder conditions, with temperatures plunging to a minimum of -12°C (11°F) and an average of just 3°C (37°F). This winter month experiences higher rainfall at 123 mm (4.8 in) over 11 days and a humidity level of 84%. For more detailed insights on the weather during this month, you can visit Shelter Island weather in February.
August and March present stark contrasts in weather conditions. In August, temperatures range from a mild 17°C (63°F) to a warm 27°C (80°F), accompanied by a relatively high humidity of 76%. Meanwhile, March experiences much colder weather, with temperatures ranging from a frigid -7°C (20°F) to a maximum of only 15°C (59°F). Precipitation levels are similar, with August averaging 103 mm (4.0 in) over 9 days and March slightly higher at 113 mm (4.5 in) across 10 days. For a deeper dive into the specifics of March weather, you can explore Shelter Island weather in March.
When comparing the weather in August and April, significant differences in temperature and precipitation become apparent. August tends to be much warmer, with average temperatures ranging from a minimum of 17°C (63°F) to a maximum of 27°C (80°F), while April sees a cooler average, with temperatures ranging from 0°C (33°F) to 16°C (61°F). Additionally, April experiences higher precipitation, totaling 137 mm (5.4 in) over 12 days, compared to August's 103 mm (4.0 in) spread across 9 days. Humidity levels are relatively similar, with August at 76% and April at 79%. For a closer look at how April weather conditions shape the experience on Shelter Island, you can explore Shelter Island weather in April.
When comparing the weather in August and May, it’s clear that August brings significantly warmer temperatures, with a minimum of 17°C (63°F) and an average of 23°C (73°F), while May has cooler temperatures, averaging only 12°C (54°F) with a maximum of 20°C (69°F). Additionally, August sees about 103 mm (4.0 in) of precipitation over 9 days, compared to May's higher precipitation of 129 mm (5.1 in) over 13 days, making May slightly wetter overall. Humidity levels in August are higher at 76%, while May is slightly lower at 75%. For a closer look at the weather specifics in May, you can read more here: Shelter Island weather in May.
When comparing the weather in August and June, one notes that August tends to be warmer, with minimum temperatures averaging 17°C (63°F) and maximums reaching 27°C (80°F). In contrast, June temperatures are more moderate, with a minimum of 11°C (52°F) and a maximum of 24°C (75°F). Additionally, August experiences higher humidity levels at 76%, compared to June's 78%, despite the latter having slightly cooler temperatures. Precipitation also differs, with August receiving 103 mm (4.0 in) over 9 days, while June has lower precipitation totals of 72 mm (2.9 in) across 8 days. For a more detailed look at June's weather, you can refer to Shelter Island weather in June.
In comparing the weather of August to that of July, both months showcase similar temperature patterns, with August recording a minimum of 17°C (63°F) and an average of 23°C (73°F), slightly warmer than July's minimum of 16°C (61°F) and average of 22°C (72°F). August's maximum temperature reaches 27°C (80°F), just a degree cooler than July's peak of 28°C (82°F). Precipitation levels are comparable, with August experiencing 103 mm (4.0 in) over 9 days, slightly more than July's 99 mm (3.9 in) over 10 days. Both months maintain a consistent humidity level of 76%. For a detailed look at July's weather, you can visit Shelter Island weather in July.
August tends to be warmer and more humid compared to September, with average temperatures reaching 23°C (73°F) and a maximum of 27°C (80°F). In contrast, September experiences a slight drop in temperatures, averaging 20°C (69°F) with a maximum of 26°C (79°F). Both months see a similar amount of precipitation—103 mm (4.0 in) in August versus 99 mm (3.9 in) in September—but August has slightly fewer rainy days, with rain falling on 9 days compared to 10 days in September. Notably, humidity is high in both months, at 76% in August and 75% in September. For more detailed information, you can check the Shelter Island weather in September.
August and October present notably different weather patterns. In August, temperatures range from a minimum of 17°C (63°F) to a maximum of 27°C (80°F), averaging around 23°C (73°F). The month sees significant rainfall, with an average precipitation of 103 mm (4.0 in) over 9 days and a relatively high humidity of 76%. In contrast, October brings much cooler temperatures, with a minimum of 5°C (42°F) and a maximum of 24°C (75°F), averaging 16°C (61°F). It also experiences increased precipitation, totaling 160 mm (6.3 in) over 14 days, along with slightly lower humidity at 75%. For more specific insights about October weather in Shelter Island, you can visit Shelter Island weather in October.
August and November present strikingly different weather experiences. In August, temperatures are warm, averaging around 23°C (73°F) with maxima reaching up to 27°C (80°F), while the nights remain mild with a minimum of 17°C (63°F). However, it is also quite humid, with an average humidity of 76% and around 103 mm (4.0 in) of precipitation over 9 days. In contrast, November brings a significant drop in temperature, with averages around 10°C (50°F) and nightly lows dipping to -5°C (24°F). The month sees a slight increase in precipitation, totaling 113 mm (4.4 in) over 10 days, and higher humidity at 80%. For more details, you can check out Shelter Island weather in November.
In August, the weather is warm and humid with temperatures ranging from a minimum of 17°C (63°F) to a maximum of 27°C (80°F) and an average of 23°C (73°F). The month experiences around 103 mm (4.0 in) of precipitation over approximately 9 days, contributing to a humidity level of 76%. In contrast, December brings a stark shift in climate, with temperatures typically falling between -9°C (16°F) and 16°C (61°F), averaging only 5°C (42°F). This colder month sees increased precipitation, totaling 147 mm (5.8 in) across about 12 days, and a slightly higher humidity level of 80%. For more detailed insights, you can check Shelter Island weather in December.
As summer reaches its peak in August, Shelter Island delights with warm temperatures that typically hover around 23°C (73°F), making it a vibrant time for outdoor activities. While the maximum temperatures climb to a comfortable 27°C (80°F), the increase in humidity, averaging 76%, can make the air feel a bit heavier compared to the drier months. August also brings an average of 103 mm (4.0 in) of precipitation over about nine days, adding a refreshing contrast to the sun-filled days. This combination of warmth and occasional summer rain sets August apart from the milder early summer months, enhancing the unique allure of Shelter Island. For more insights on the local weather patterns, visit Shelter Island Climate.