Last updated: February 24, 2025
In Amagansett, United States, September offers a delightful transition into autumn with average temperatures hovering around 20°C (69°F), peaking at a pleasant 26°C (79°F) and dipping to a refreshing 12°C (55°F). This month typically experiences 99 mm (3.9 in) of precipitation across about 10 days, contributing to the area's lush scenery. With a humidity level of 75%, visitors can expect a mild yet invigorating climate, perfect for enjoying outdoor activities and soaking in the natural beauty of the region as summer gives way to the vibrant colors of fall.
As September arrives in Amagansett, the warmth of summer gradually begins to mellow, ushering in a delightful transitional month. With minimum temperatures hovering around 12°C (55°F) and the average peaking at a comfortable 20°C (69°F), the weather strikes a perfect balance that's ideal for outdoor activities. The maximum temperature can reach up to 26°C (79°F), providing those last few opportunities for beach outings and sunset picnics. Unlike the cooler months, September's milder climate beckons locals and visitors alike to revel in the natural beauty of the area, making it a gem for those who appreciate transitional seasons. Overall, it’s a time of stunning sunsets and pleasant days, setting the stage for the cooler autumn days ahead.
In September, Amagansett experiences a precipitation level of 99 mm (3.9 in), aligned closely with the summer months that precede it. With 10 days of rain, September maintains a balance between the drier spells of summer and the wetter conditions that characterize the autumn months. This trend marks a gradual increase from the drier month of June, hinting at the transition into a more volatile weather pattern as the fall approaches. Comparatively, September's rainfall amounts are nearly on par with August's, suggesting a lingering warmth before the heavier rains of October set in, where precipitation typically escalates to 160 mm (6.3 in) over 14 days. Overall, September serves as a bridge between the light, warm rain of summer and the churning downpours of autumn, making it a pivotal month in Amagansett's precipitation narrative.
In September, Amagansett experiences a notable drop in humidity, settling at 75%, which mirrors the levels observed during the preceding months of May and October. This decrease marks a gentle transition from the more humid summer months, such as July and August where humidity remained at 76%. The overall trend reveals a gradual decline in humidity as the year progresses, with early months showing significantly higher levels, peaking at 84% in January and February. As the season shifts, residents and visitors can enjoy a more comfortable atmosphere, making this month particularly pleasant for outdoor activities.
As summer transitions into fall, September in Amagansett still boasts a notably high UV Index of 8. While this marks a slight decline from the peak months of July and August, the UV levels remain in the very high exposure category, indicating that outdoor enthusiasts should exercise caution. With a brief burn time of just 15 minutes, it’s essential to protect your skin even as the temperatures start to cool. This trend of elevated UV exposure through the summer months enhances the need for sun safety practices as the season winds down. For a closer look at the UV conditions throughout the year, check out the detailed information available at Amagansett UV Index.
UV Risk Categories
As summer gracefully fades into fall, September in Amagansett continues to bask in a generous 281 hours of sunshine. This month marks a transition from the peak intensity of July, which boasts a dazzling 349 hours, and the radiant warmth of August's 327 hours. The sunlight begins to soften, yet the residual summer glow lingers, enticing locals and visitors alike to relish the pristine beaches and vibrant landscapes. As the days grow shorter, September serves as a reminder of the sun-drenched moments of summer, while gently nudging the community toward the cozy embrace of autumn. With each passing month, the gradually decreasing sunlight reflects a seasonal rhythm, creating a perfect blend of warmth and welcoming change.
In Amagansett, September brings a 49% chance of sunny weather, closely mirroring the sunny disposition seen in both January and April. This transitional month sees a modest uplift compared to the preceding summer months of July and August, which dipped to 45% and 35%, respectively. Interestingly, the likelihood of sunshine in September aligns well with the autumn months that follow, suggesting a consistent balance of clear days. As fall settles in, the probabilities remain stable, with October just slightly ahead at 46% and November taking the lead at 53%. Overall, this pattern indicates that while summer may wane, sunny days linger well into September in Amagansett, offering residents and visitors ample opportunities to enjoy the outdoors.
As September unfolds in Amagansett, the daylight duration begins its gradual descent, offering approximately 12 hours of sunlight each day. This month marks a transition from the peak brightness of summer, where June basked in 15 hours of daylight, down to the milder light of fall. The trend illustrates a steady decrease from the vibrant 14 hours of daylight in July and 13 hours in August, as the days start to shorten in anticipation of the cooler months ahead. With the sun setting earlier, September invites a contemplative atmosphere, showcasing the beauty of the changing seasons while hinting at the cozy indoor gatherings that lie ahead. As daylight hours decrease, they remind us of the cyclical nature of time in this charming coastal town.
As September unfolds in Amagansett, the average wind speed picks up slightly to 6.1 m/s (14 mph), signaling a transition from the calmer summer months. This gentle increase from August's 4.9 m/s suggests a refreshing shift in the atmosphere, as coastal breezes begin to dance a bit more vigorously. Compared to the peaks of winter, where winds gust at around 7.3 m/s, these early fall breezes offer a delightful balance—invigorating yet still mild enough for leisurely beach strolls. This trend establishes September as a month of renewed energy, bridging the tranquil summer with the briskness of autumn, making it a perfect time for both relaxation and outdoor adventures amidst the vibrant changing scenery.
The weather in Amagansett 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 Amagansett and find detailed weather information for every month.
September and January present stark contrasts in weather patterns. In September, temperatures are mild, with averages around 20°C (69°F) and highs reaching 26°C (79°F), complemented by a relatively humid atmosphere at 75%. However, this month also experiences some rainfall, with about 99 mm (3.9 in) of precipitation over an average of 10 days. In contrast, January is notably colder, with average temperatures plummeting to 2°C (37°F) and lows sinking to -13°C (8°F). Though precipitation is slightly less at 89 mm (3.5 in) over 9 days, the humidity rises to 84%, contributing to a crisp, wintry feel. For those interested in more details, you can check out Amagansett weather in January.
September and February display stark contrasts in weather patterns. In September, temperatures are milder, ranging from a minimum of 12°C (55°F) to a maximum of 26°C (79°F), with an average of 20°C (69°F), accompanied by humidity levels around 75%. Conversely, February experiences much colder conditions, with temperatures plunging to a minimum of -12°C (11°F) and an average of just 3°C (37°F), making it a chilly month. Additionally, February sees slightly more precipitation at 123 mm (4.8 in) over 11 days, compared to September’s 99 mm (3.9 in) over 10 days. For more details, you can explore Amagansett weather in February.
In comparing the weather of September and March, there are striking differences that reflect the seasonal transitions. September enjoys milder temperatures, with averages around 20°C (69°F) and a maximum reaching 26°C (79°F), while March is much cooler, averaging only 4°C (39°F) and peaking at 15°C (59°F). Precipitation levels are relatively close, with September receiving 99 mm (3.9 in) and March slightly higher at 113 mm (4.5 in); both months experience rainfall on about 10 days. Humidity is also higher in March at 82%, compared to September’s 75%, contributing to a chillier feel in the month leading into spring. For more detailed insights, you can check Amagansett weather in March.
In September, the weather is generally warmer with temperatures ranging from a minimum of 12°C (55°F) to a maximum of 26°C (79°F), averaging around 20°C (69°F). The month usually experiences about 99 mm (3.9 in) of precipitation over approximately 10 days, with humidity levels at 75%. In contrast, April features much cooler conditions, with temperatures varying from a low of 0°C (33°F) to a high of 16°C (61°F), leading to an average temperature of 8°C (47°F). April tends to be wetter, with precipitation at 137 mm (5.4 in) spread out over 12 days, along with slightly higher humidity at 79%. For more detailed insights into April weather, you can visit Amagansett weather in April.
September typically offers warmer weather compared to May, with average temperatures ranging from a minimum of 12°C (55°F) to a maximum of 26°C (79°F). In contrast, May starts off cooler, with temperatures averaging between 4°C (39°F) and 20°C (69°F). While September sees about 99 mm (3.9 in) of precipitation over approximately 10 days, May tends to be slightly wetter, accumulating 129 mm (5.1 in) of rainfall across 13 days. Both months share a humidity level of 75%, making them relatively comfortable despite the differing temperatures. For a more detailed look at the weather in May, visit Amagansett weather in May.
In comparing the weather of September and June, September tends to be slightly warmer, with average temperatures around 20°C (69°F) compared to June's average of 18°C (64°F). Both months experience mild minimum temperatures, but September offers a higher maximum temperature of 26°C (79°F) versus June's 24°C (75°F). Precipitation is more prevalent in September, with about 99 mm (3.9 in) over 10 days, whereas June sees less rain at 72 mm (2.9 in) across 8 days. Humidity levels are similar, with September at 75% and June slightly lower at 78%. For more detailed information, you can explore Amagansett weather in June.
Comparing the weather in September and July reveals notable differences. 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). This contrasts with July, where temperatures are slightly warmer, ranging from a minimum of 16°C (61°F) to a maximum of 28°C (82°F), averaging 22°C (72°F). Both months receive the same amount of precipitation—99 mm (3.9 in) over 10 days—but September has a slightly higher humidity level at 75%, compared to July's 76%. For a more detailed look at July’s weather, check out Amagansett weather in July.
In comparing the weather of September and August, September tends to be cooler with average temperatures around 20°C (69°F), while August maintains a warmer average of 23°C (73°F). The minimum temperatures in September drop to 12°C (55°F), compared to August's milder 17°C (63°F). Precipitation levels are quite similar, with September receiving 99 mm (3.9 in) over about 10 days, slightly less than August's 103 mm (4.0 in) over 9 days. Humidity remains relatively consistent, at 75% in September and 76% in August. For a more detailed look at August's weather specifics, you can check Amagansett weather in August.
September typically experiences milder temperatures, with average highs reaching 26°C (79°F) and lows around 12°C (55°F). It sees moderate precipitation of 99 mm (3.9 in) over approximately 10 days, while humidity remains steady at 75%. In contrast, October brings a noticeable drop in temperatures, with an average of 16°C (61°F); maximums peak at 24°C (75°F) and minimums fall to 5°C (42°F). Rainfall increases significantly to 160 mm (6.3 in), distributed over 14 days, maintaining the humidity at 75%. For more detailed insights on what to expect, check out Amagansett weather in October.
In comparing the weather between September and November, it's clear that there is a significant shift in temperatures and conditions. September boasts a milder climate with temperatures ranging from a minimum of 12°C (55°F) to a maximum of 26°C (79°F), while November brings much colder conditions, with lows dipping to -5°C (24°F) and highs reaching only 19°C (67°F). Additionally, September experiences slightly less precipitation at 99 mm (3.9 in) compared to November's 113 mm (4.4 in), though both months have about ten days of rain. Humidity also increases in November, peaking at 80% compared to September’s 75%. For more insights into November weather specifics, check out Amagansett weather in November.
September and December present strikingly different weather patterns. In September, temperatures range from a mild 12°C (55°F) to a comfortable 26°C (79°F), with an average of 20°C (69°F), while December sees much colder conditions with highs only reaching 16°C (61°F) and lows plummeting to -9°C (16°F). Precipitation also varies, with September experiencing 99 mm over 10 days, compared to December's 147 mm over 12 days. Humidity levels rise slightly from 75% in September to 80% in December, adding to the notable chill of the winter month. For more detailed information, you can check Amagansett weather in December.
September in Amagansett marks a distinct transition as summer fades into autumn. The temperatures are pleasantly mild, averaging around 20°C (69°F), which offers a refreshing contrast to the heat of the preceding months. However, the month also brings its share of moisture, averaging 99 mm of precipitation over about 10 days, creating a humid atmosphere that can feel quite different from the drier summer days. As humidity hovers around 75%, visitors can expect a blend of warm days and cooler nights, making it a unique time to experience the shifting seasons. For more insights into the changing climate, explore Amagansett Climate.