Last updated: February 24, 2025
September in East Hampton, United States, ushers in a pleasant transition towards autumn, with maximum temperatures averaging 26°C (79°F) and a comfortable average of 20°C (69°F). Nights can be a bit cooler, dipping to a minimum of 12°C (55°F). With 99 mm (3.9 in) of rainfall spread over 10 days, the month showcases a mix of sunny spells and gentle showers, contributing to a consistent humidity level of 75%. This blend of mild temperatures and occasional precipitation creates an inviting atmosphere, perfect for outdoor activities and enjoying the natural beauty of the region.
In September, East Hampton begins to transition from the warm embrace of summer to the crispness of autumn. With minimum temperatures around 12°C (55°F) and averaging a pleasant 20°C (69°F), the warmth still lingers, inviting outdoor activities. Daytime highs reach a delightful 26°C (79°F), making it one of the last chances to enjoy the beaches before the cooler months set in. Compared to the sweltering heights of July and August, September offers a comfortable reprieve, highlighting the region's remarkable ability to balance seasonal extremes while providing a delightful experience for locals and visitors alike. As the month progresses, the gradual drop in temperatures foreshadows the arrival of autumn, transforming the landscape into a canvas of vibrant fall colors.
In September, East Hampton experiences a transient shift in its weather patterns, with precipitation totaling 99 mm (3.9 in) over 10 rainy days. This amount remains consistent with prior months, reflecting a continuation of late summer humidity and occasional showers. While it marks a slight dip from the more humid August (103 mm), it paves the way for the imminent increase in rainfall typical of October, which usually brings about 160 mm (6.3 in). Overall, September serves as a bridge between the warm summer months and the wetter autumn season, underscoring the region's variable climate as it transitions toward winter.
In September, East Hampton experiences a noticeable shift in humidity, with levels dropping to 75%. This marks a continuation of the subtle decline from the summer months, where humidity peaked at 76% in both July and August. As fall approaches, average humidity levels tend to stabilize, remaining consistent through October. This trend indicates a gradual transition to drier air, a welcome change that often enhances the delightful autumn ambiance in the region. Overall, September serves as a pivotal point where the lingering warmth of summer meets the crispness of fall, making it a refreshing time for both residents and visitors.
In September, East Hampton experiences a UV Index of 8, signaling a very high level of ultraviolet radiation that warrants caution. As summer wanes, the index reflects a gradual decline from the peak months of June and July, where it reached a maximum of 10. However, with a burn time of just 15 minutes, continued vigilance is essential to protect your skin during outdoor activities. This trend of elevated UV levels persists from early spring through late summer, highlighting the importance of sun safety practices throughout the warmer months. As autumn approaches, be mindful of the sun's rays and stay informed with resources like the East Hampton UV Index, which provide essential updates for outdoor enthusiasts.
UV Risk Categories
As September rolls into East Hampton, the sunshine continues to grace the landscape with an impressive 281 hours of glorious daylight, making it one of the sunniest months of the year. This late-summer glow bridges the vibrant, sun-drenched days of July and August—which peak at 349 and 327 hours, respectively—while still offering more sun than the earlier months of spring. After a delightful summer, the sunshine gradually begins to wane, with hours slipping to 229 in October, highlighting the seasonal transition ahead. Yet, September stands as a beautiful reminder of summer's lingering warmth, inviting residents and visitors alike to bask in its light before the cooler months set in.
In East Hampton, September boasts a 49% chance of sunny weather, aligning closely with the averages of both January and April. As summer transitions to fall, September's sunshine likelihood remains steady, suggesting a stable climate that invites outdoor activities. Notably, this month stands out against an overall decline in sunny probabilities from the peak of summer in July, with its lower rates of sunshine in August. As the year progresses into autumn, the weather patterns become increasingly varied, but September still holds a favorable promise for those looking to bask in the sun before the winter chill sets in.
As September arrives in East Hampton, the days begin to subtly shorten, offering about 12 hours of daylight. This marks a transition from the peak summer months, where July basked in 14 hours of sunlight, to the cooler and shorter days ahead, especially as October brings only 11 hours. The month of September showcases a gentle decline in daylight hours, a reminder of summer's fade into fall. Nature starts to shift, inviting the rich hues of autumn as daylight weaves its way through early golden leaves. The gradual reduction in sunlight also sets the stage for cozy evenings, creating an atmosphere ripe for reflection and anticipation of the changing seasons.
As the summer breeze begins to wane, September in East Hampton ushers in a refreshing change with an average wind speed of 6.1 m/s (14 mph). This gentle wind follows the season's slow descent from the more languid, warm currents of July and August, where the speeds dropped to around 4.8 m/s (11 mph). As autumn approaches, you can sense a shift, with winds picking up again—rising slightly compared to the late summer months and leaning closer to the stronger winds of spring. This transitional period serves as a reminder of the dynamic nature of East Hampton's climate, where each month’s unique wind patterns contribute to the enchanting atmosphere of this coastal gem.
The weather in East Hampton changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in East Hampton and find detailed weather information for every month.
September and January present contrasting weather experiences. In September, temperatures typically range from a mild 12°C (55°F) at night to a warm 26°C (79°F) during the day, with an average temperature of 20°C (69°F). This month sees 99 mm (3.9 in) of precipitation over about 10 days, accompanied by a humidity level of 75%. In stark contrast, January brings much colder conditions, with temperatures dipping as low as -13°C (8°F) and averaging just 2°C (37°F). Daytime highs reach only up to 13°C (56°F), and the month receives 89 mm (3.5 in) of precipitation spread over 9 days, with higher humidity at 84%. For more detailed information about the weather in January, you can visit East Hampton weather in January.
September and February present starkly contrasting weather conditions. In September, temperatures range from a mild 12°C (55°F) to a warm 26°C (79°F), with an average of 20°C (69°F) and a moderate humidity level of 75%. The month sees approximately 99 mm (3.9 in) of precipitation over 10 days, making it a relatively pleasant time of year. In contrast, February is marked by much colder temperatures, with a minimum of -12°C (11°F) and a maximum of 12°C (53°F), leading to an average of just 3°C (37°F). Despite slightly higher precipitation at 123 mm (4.8 in) over 11 days, the humidity increases to 84%, contributing to a harsher winter feel. For more details on the February weather, you can check East Hampton weather in February.
September and March present two distinct weather profiles. September enjoys a milder climate, with average temperatures ranging from a comfortable 12°C (55°F) to a warm 26°C (79°F), while March grapples with cooler conditions, showcasing a stark contrast with temperatures from -7°C (20°F) to a maximum of just 15°C (59°F). Both months witness approximately ten days of precipitation, but September records slightly less rainfall at 99 mm (3.9 in) compared to March's 113 mm (4.5 in). Additionally, humidity levels peak in March at 82%, surpassing September's 75%, indicating a damp chill as winter departs. For a more detailed look at March weather specifics, you can check East Hampton weather in March.
In comparing the weather between September and April, we see a notable contrast. September boasts milder temperatures, with an average of 20°C (69°F) and maximums reaching up to 26°C (79°F), making it a pleasant time of year. In contrast, April is cooler, featuring an average temperature of only 8°C (47°F) and a maximum of 16°C (61°F). Although April experiences slightly more precipitation at 137 mm (5.4 in) over about 12 days compared to September's 99 mm (3.9 in) across 10 days, both months have high humidity levels, with April at 79% and September at 75%. For a closer look at conditions during April specifically, you can check out East Hampton weather in April.
Comparing the weather in September and May reveals distinct seasonal differences. In September, temperatures range from a comfortable minimum of 12°C (55°F) to a pleasant maximum of 26°C (79°F), providing an average of 20°C (69°F). The month experiences about 99 mm (3.9 in) of precipitation over approximately 10 days, while humidity remains steady at 75%. In contrast, May sees cooler temperatures, with a minimum of 4°C (39°F) and a maximum of 20°C (69°F), resulting in a lower average of 12°C (54°F). Precipitation is slightly higher at 129 mm (5.1 in) across 13 days, yet humidity stays consistent at 75%. For a detailed overview of the weather patterns, you can check East Hampton weather in May.
In comparing the weather between September and June, one can observe that September tends to be slightly warmer, with average temperatures reaching 20°C (69°F) compared to June's average of 18°C (64°F). September also has a higher maximum temperature of 26°C (79°F), while June peaks at 24°C (75°F).
Moreover, precipitation is more frequent in September, with 99 mm (3.9 in) over 10 days, while June sees only 72 mm (2.9 in) over 8 days. Humidity levels remain comparable, with September at 75% and June at 78%. For those looking for more detailed information, you can check out East Hampton weather in June.
When comparing the weather in July and September, we can see distinct differences despite similar precipitation levels. July typically has warmer temperatures, with a minimum of 16°C (61°F) and an average of 22°C (72°F), peaking at 28°C (82°F). In contrast, September experiences cooler temperatures, starting at a minimum of 12°C (55°F) and averaging 20°C (69°F), with a maximum of 26°C (79°F). Both months receive about 99 mm (3.9 in) of precipitation over approximately 10 days, but humidity remains quite similar, with July at 76% and September slightly lower at 75%. For a detailed look at July weather specifics, check out East Hampton weather in July.
In comparing the weather of September and August, September features cooler temperatures with a minimum of 12°C (55°F) and an average of 20°C (69°F), while August is warmer, with a minimum of 17°C (63°F) and an average of 23°C (73°F). Both months experience similar levels of precipitation, with September recording 99 mm (3.9 in) over 10 days and August slightly higher at 103 mm (4.0 in) over 9 days. Humidity remains quite comparable, at 75% in September and 76% in August. For more detailed information, you can check East Hampton weather in August.
September and October present notable contrasts in weather patterns. In September, temperatures range from a minimum of 12°C (55°F) to a maximum of 26°C (79°F), with an average of 20°C (69°F), while experiencing about 99 mm (3.9 in) of precipitation over approximately 10 days. In contrast, October sees a dip in temperatures, with a minimum of 5°C (42°F) and an average of 16°C (61°F), rising to a max of 24°C (75°F). This month experiences increased precipitation, totaling 160 mm (6.3 in) over around 14 days, while maintaining a consistent humidity level of 75%. For more specific insights into weather conditions, refer to East Hampton weather in October.
In September, temperatures are generally milder, with average highs reaching 26°C (79°F) and lows around 12°C (55°F), fostering a pleasant and comfortable atmosphere. Precipitation is moderate, totaling 99 mm (3.9 in) over about 10 days, accompanied by a humidity level of 75%. In contrast, November experiences a more noticeable chill, with average temperatures dropping to a maximum of 19°C (67°F) and a minimum of -5°C (24°F). Rainfall increases slightly to 113 mm (4.4 in) across the same number of days, and humidity rises to 80%. For a detailed look at weather conditions during November, you can visit East Hampton weather in November.
In September, the weather in East Hampton is characterized by mild temperatures, with a minimum of 12°C (55°F) and an average of 20°C (69°F), peaking at a comfortable 26°C (79°F). This month experiences moderate rainfall, totaling 99 mm (3.9 in) over about 10 days, and humidity levels are around 75%.
In contrast, December brings much colder conditions, with temperatures dropping significantly; the minimum temperature can reach as low as -9°C (16°F) and the average temperature hovers around 5°C (42°F). The maximum temperature during this month averages 16°C (61°F), but the increased precipitation of 147 mm (5.8 in) spread across 12 days indicates a wetter climate. Moreover, December's humidity rises slightly to 80%. For more detailed information, you can check out East Hampton weather in December.
As summer transitions into fall, September in East Hampton offers a wonderful blend of mild temperatures and refreshing coastal breezes. The warmth of the season lingers, but the cooler evenings signal a gradual change, making it a perfect time for outdoor activities. Unlike the peak summer months, September experiences a slight uptick in precipitation, and the humidity remains notable, creating a unique atmosphere for both relaxation and exploration. For those interested in the nuances of East Hampton's weather patterns, the month of September stands out as a beautiful bridge between summer's warmth and autumn's chill. Discover more about the region's climate at East Hampton Climate.