September Weather in Westhampton Beach, United States

Last updated: February 24, 2025

September in Westhampton Beach, United States offers a delightful transition from summer to autumn, characterized by a maximum temperature of 26°C (80°F) and an average of 20°C (69°F), providing a comfortable climate for outdoor activities. As the month progresses, temperatures dip to a minimum of 13°C (56°F), hinting at the forthcoming chill of fall. Despite experiencing 93 mm (3.7 in) of precipitation over 10 days, the humidity remains at a moderate 68%, contributing to the region's lush landscapes. This unique blend of warmth and moisture makes September a captivating time to explore the natural beauty and charming local culture of Westhampton Beach.

September Temperature in Westhampton Beach

September in Westhampton Beach marks a delightful transition into early autumn, presenting a pleasant climate that beckons locals and tourists alike. With minimum temperatures averaging around 13°C (56°F) and daytime highs reaching up to 26°C (80°F), the month enjoys a comfortable warmth that feels akin to summer's embrace. The average temperature settles at 20°C (69°F), offering a perfect backdrop for outdoor activities and beach strolls before the cooler months set in. This month stands out as the last hurrah of warm weather, with a notable drop in temperatures compared to the peak summer months of July and August, creating a harmonious blend of warmth and freshness that is unique to September in this picturesque seaside town.

September Weather in Westhampton Beach: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Westhampton Beach, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec373840475464737469625043
Data source: Temperature data for Westhampton Beach generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Westhampton Beach

In September, Westhampton Beach experiences a moderate average precipitation of 93 mm (3.7 in) over about 10 days. This rainfall marks a slight decline from the preceding months, hinting at the transition toward autumn. While it's less than the more rain-soaked summer months of July and August, which saw 89 mm (3.5 in) and 103 mm (4.0 in) respectively, it remains consistent with the annual trend of varied rainfall. Overall, September serves as a prelude to the wetter October, which typically brings 156 mm (6.1 in) of rain, signaling a shift in weather patterns as the year progresses.

September Precipitation Trends in Westhampton Beach

The chart displays monthly precipitation patterns in Westhampton Beach, with values for each month alongside September's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec90124115132130648910393156110146
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Westhampton Beach

In Westhampton Beach, September experiences a modest humidity level of 68%, continuing a gradual decline from the summer's peak. As the year progresses from the high 84% in January to a drier 62% in July, September marks a slight rebound in moisture compared to August, which sits at 65%. This subtle increase signals the transition into autumn, as humidity begins to rise again in October, reaching 74%. Overall, while September remains relatively humid, it reflects a seasonal pattern where the lush summer air gives way to the crispness of fall, providing a refreshing respite as the days shorten and temperatures begin to cool.

September Average Humidity in Westhampton Beach

This chart illustrates the average monthly humidity levels in Westhampton Beach, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Westhampton Beach

In September, Westhampton Beach experiences a UV Index of 8, indicating a very high level of sun exposure that demands caution. As summer wanes, the burn time remains relatively short at just 15 minutes, similar to the peak months of June through August. This trend highlights the importance of continued sun protection even as the temperatures begin to drop. With UV Index values transitioning from a high of 10 in July and August to this lower, yet still significant level, residents and visitors should stay vigilant about safeguarding their skin. For more details on UV conditions throughout the year, check out the comprehensive guide at Westhampton Beach UV Index.

Maximum UV Index Levels in Westhampton Beach for September

The chart shows the monthly maximum UV Index (UVI) for Westhampton Beach in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: Westhampton Beach September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Westhampton Beach

As summer gracefully transitions into early autumn, September in Westhampton Beach offers a delightful balance of warmth and sunshine. With an impressive 278 hours of sunlight, it marks a slight decline from the sun-kissed days of July and August, yet it's still significantly brighter than the depths of winter. This month encapsulates the essence of late summer with lingering warmth, perfect for enjoying the beach before the chill sets in. The gradual reduction in daylight serves as a gentle reminder of the changing seasons, making September a perfect time to savor the beauty of nature's palette as it begins to shift.

Monthly Sunshine Duration in Westhampton Beach: September Highlighted

The September sunshine duration represents the total number of hours Westhampton Beach experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec151h181h259h248h295h319h351h328h278h233h206h171h
Data source: Westhampton Beach September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Westhampton Beach During September

In Westhampton Beach, September enjoys a 50% chance of sunny weather, marking a favorable outlook as summer transitions into autumn. This month is notable for slightly improved conditions compared to the preceding months, where chances dipped to 36% in August and fluctuated between the mid to high 40s earlier in the summer. Unlike the colder months, which see a steady increase in sun probabilities, September strikes a balance, making it a prime time for outdoor activities. With a 51% likelihood in November, the sunny days are poised to continue, hinting at the lingering warmth of late summer. Overall, September offers a welcome retreat from the heavier cloud cover of earlier summer months, inviting both locals and visitors to bask in the sun before fall fully sets in.

Percentage of Sunny Days in September in Westhampton Beach

The chart illustrates the percentage of sunny days in Westhampton Beach throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Westhampton Beach experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec48%30%58%49%47%41%47%36%50%46%52%32%
Data source: Westhampton Beach September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Westhampton Beach in September

As summer transitions into autumn, September in Westhampton Beach reveals a notable shift in daylight hours, averaging 12 hours of sunlight each day. This marks a gradual decline from the longer days of summer—with June peaking at 15 hours—to the shorter daylight of fall and winter. Following the vibrant and longer days of May and June, when residents basked in nearly 14 to 15 hours of daylight, September acts as a gentle reminder of the approaching chill, with daylight diminishing further to 11 hours in October. This gradual decrease not only signals the end of beach days but also sets the stage for cozy fall evenings, creating a beautiful blend of lingering warmth and the anticipation of seasonal change.

Average Daylight Hours in Westhampton Beach for September

The chart illustrates the variation in daylight duration in Westhampton Beach throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 36m10h 39m11h 58m13h 19m14h 28m15h 2m14h 43m13h 42m12h 24m11h 3m9h 53m9h 17m
Data source: Westhampton Beach daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Westhampton Beach

As September arrives in Westhampton Beach, the air begins to shift, ushering in a blend of summer warmth and early autumn crispness. With an average wind speed of 6.0 m/s (13 mph), this month marks a slight increase from the languid breezes of July and August, which often languish around 4.9 to 5.0 m/s. The winds in September, while still gentle, hint at a rejuvenating transition, setting the stage for more invigorating currents in October when speeds pick up again. This subtle uptick represents a balance between the fading summer and the approaches of fall, making September a delightful month where the winds whisper stories of the changing seasons.

Average September Wind Speed in Westhampton Beach

The chart displays monthly wind speed patterns in Westhampton Beach, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec7.57.57.06.26.05.85.04.96.0 m/s6.66.96.7
Data source: Westhampton Beach September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Westhampton Beach Compares to Other Months

The weather in Westhampton Beach 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 Westhampton Beach and find detailed weather information for every month.

September and January present a stark contrast in weather patterns. In September, temperatures range from a mild 13°C (56°F) to a comfortable 26°C (80°F), with an average of 20°C (69°F), creating a pleasant late summer atmosphere. Precipitation is moderate, with about 93 mm (3.7 in) over approximately 10 days, and humidity levels reach around 68%. In sharp contrast, January brings much colder conditions with temperatures plummeting from a chilly -13°C (10°F) to a maximum of 13°C (56°F), averaging only 3°C (37°F). Despite having similar precipitation levels at 90 mm (3.6 in) over 9 days, January's higher humidity at 84% contributes to a much more biting cold. For more specific details, check out the Westhampton Beach weather in January.

In September, Westhampton Beach enjoys mild temperatures, with averages around 20°C (69°F), and ranges from a pleasant 13°C (56°F) to a warm 26°C (80°F). The month also features moderate precipitation levels, accumulating 93 mm (3.7 in) over about 10 days, accompanied by a comfortable humidity level of 68%. In contrast, February experiences a significant drop in temperatures, averaging just 3°C (38°F), with lows plunging to -12°C (11°F) and highs reaching only 12°C (54°F). This winter month is wetter, accumulating 124 mm (4.9 in) of precipitation across 12 days, paired with higher humidity at 82%. To explore February's weather further, visit Westhampton Beach weather in February.

In comparing the weather between September and March, it’s evident that there is a marked difference in temperature and conditions. September enjoys milder temperatures with a minimum of 13°C (56°F), an average of 20°C (69°F), and a maximum of 26°C (80°F). The month sees an average humidity of 68% and 93 mm (3.7 in) of precipitation over about 10 days. In contrast, March is much colder, with temperatures ranging from a minimum of -6°C (21°F) to a maximum of 15°C (59°F) and an average of only 4°C (40°F). This month experiences slightly higher precipitation at 115 mm (4.5 in) over the same number of days, along with a higher humidity level at 81%. For detailed insights on March weather, visit Westhampton Beach weather in March.

When comparing the weather in September and April, a noticeable difference in temperature and precipitation becomes apparent. September boasts milder temperatures, with a minimum of 13°C (56°F) and an average of 20°C (69°F), while April starts off much cooler, with a minimum of 0°C (33°F) and an average of just 8°C (47°F). Precipitation is also an essential factor; September receives 93 mm (3.7 in) over about 10 days, whereas April experiences slightly more rainfall at 132 mm (5.2 in) across 12 days. Additionally, humidity levels are higher in April at 78%, compared to September's 68%. For a deeper dive into April weather specifics, you can check out Westhampton Beach weather in April.

September and May present contrasting weather patterns. In September, temperatures range from a mild 13°C (56°F) at night to a warm 26°C (80°F) during the day, offering an average of 20°C (69°F). This month experiences about 93 mm (3.7 in) of rainfall over approximately 10 days, with humidity levels around 68%. In contrast, May starts cooler with nighttime temperatures dropping to 4°C (39°F) and daytime highs reaching 21°C (70°F), averaging 12°C (54°F). Although May sees slightly higher rainfall at 130 mm (5.1 in) over 12 days, humidity remains similar at 69%. For more detailed insights on May weather, you can visit Westhampton Beach weather in May.

When comparing the weather in September and June, September generally enjoys slightly warmer temperatures. While both months have similar minimum temperatures, September averages around 20°C (69°F) with maximums reaching 26°C (80°F), compared to June's average of 18°C (65°F) and a maximum of 24°C (76°F). Precipitation is more prevalent in September, with 93 mm (3.7 in) falling over 10 days, whereas June sees less rain at 64 mm (2.5 in) over 8 days. Interestingly, humidity levels are comparable in both months, hovering around 68-69%. For more detailed insights into June's weather, you can visit Westhampton Beach weather in June.

In comparing the weather of September and July, September tends to be slightly cooler with average temperatures ranging from a minimum of 13°C (56°F) to a maximum of 26°C (80°F), compared to July's warmer averages of 17°C (62°F) to 28°C (82°F). Both months experience a comparable amount of precipitation, with September receiving about 93 mm (3.7 in) and July slightly less at 89 mm (3.5 in), and both months seeing rain on approximately 10 days. However, September's humidity is higher at 68%, while July maintains a lower humidity level of 62%. For more details on July weather, you can visit Westhampton Beach weather in July.

When comparing the weather in September to August, September tends to be slightly cooler with average temperatures ranging from a minimum of 13°C (56°F) to a maximum of 26°C (80°F), compared to August, which holds warmer averages with a minimum of 17°C (63°F) and a maximum of 27°C (81°F). Additionally, September experiences marginally less precipitation, totaling 93 mm (3.7 in) over 10 days, while August sees 103 mm (4.0 in) across the same number of days. Humidity levels are also slightly higher in September at 68%, compared to August's 65%. For more detailed insights, you can check Westhampton Beach weather in August.

September and October exhibit notable differences in weather patterns. September tends to be warmer, with temperatures ranging from a minimum of 13°C (56°F) to a maximum of 26°C (80°F), while October sees cooler temperatures, with a minimum of 6°C (43°F) and an average of 16°C (62°F). Additionally, October experiences higher precipitation levels, totaling 156 mm (6.1 in) over 13 days compared to September’s 93 mm (3.7 in) over 10 days. Humidity also rises slightly in October, averaging 74% compared to 68% in September. For a detailed look at the weather conditions during this month, check out Westhampton Beach weather in October.

September offers a milder climate with average temperatures ranging from 13°C (56°F) at night to a warm 26°C (80°F) during the day, and a relatively low precipitation level of 93 mm (3.7 in) over about 10 days. In contrast, November brings a notable drop in temperatures, with a chilling minimum of -4°C (25°F) and an average of 10°C (51°F). While precipitation increases slightly to 110 mm (4.3 in) over the same number of days, humidity levels also rise to 82%, making the air feel cooler and more brisk. For more insights on November weather in this region, check Westhampton Beach weather in November.

September and December present strikingly different weather patterns. In September, temperatures range from a pleasant min of 13°C (56°F) to a warm max of 26°C (80°F), with an average of 20°C (69°F). The month experiences moderate precipitation of 93 mm (3.7 in) over approximately 10 days and a humidity level of 68%. In contrast, December brings much colder weather, with temperatures dropping dramatically to a minimum of -8°C (18°F) and an average of just 6°C (43°F). The month also sees increased precipitation at 146 mm (5.7 in) over 11 days, coupled with higher humidity at 80%. For more details about December weather, check out Westhampton Beach weather in December.

Compare Westhampton Beach's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Westhampton Beach

As September unfolds in Westhampton Beach, the transition to fall is palpable, offering a refreshing change from the summer heat. The temperatures begin to dip, presenting milder days that maintain a pleasant warmth, while evenings usher in cooler breezes. This month typically experiences a higher chance of rain, with about a third of the days seeing precipitation, contributing to the overall humidity in the air. Compared to the sweltering summer months, September’s weather creates a more comfortable outdoor experience, perfect for enjoying the beautiful coastal scenery. For an in-depth look at seasonal variations, explore Westhampton Beach Climate.