September Weather in Edgartown, United States

Last updated: February 24, 2025

September in Edgartown presents a charming blend of mild temperatures and lush landscapes, making it a delightful time to visit. With maximum temperatures reaching 25°C (78°F) and an average of 20°C (67°F), the weather is pleasantly warm yet comfortable. Visitors should prepare for the occasional rain, as the area experiences approximately 117 mm (4.6 in) of precipitation over 10 days, contributing to the vibrant fall foliage. The humidity level of 75% adds a touch of softness to the air, creating a serene backdrop for exploring Edgartown's picturesque scenery and coastal charm.

September Temperature in Edgartown

In September, Edgartown experiences a transition from the warm summer months to the cooler fall season, bringing with it a refreshing change in temperatures. With a minimum of 14°C (57°F) and an average of 20°C (67°F), days are still pleasant, but the highs gradually taper off to a comfortable 25°C (78°F). This trend signifies an inviting atmosphere for outdoor activities, as the lingering warmth offers a perfect balance for enjoying the crisp autumn air without the intense heat of summer. As September unfolds, Edgartown welcomes visitors with its milder climate, setting the stage for a picturesque fall experience by the coast.

September Weather in Edgartown: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Edgartown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec353638465463717267604940
Data source: Temperature data for Edgartown 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 Edgartown

September in Edgartown brings a notable shift in precipitation patterns as the summer season wanes. With 117 mm (4.6 inches) of rain over approximately 10 days, it marks a transition to a wetter climate, surpassing the drier months of June and July. This increase is reminiscent of April's rainfall, suggesting that autumn is emerging with a heightened potential for showers. The rainfall during September serves as a precursor to the more substantial precipitation seen in October, which averages 168 mm (6.6 inches), hinting at an upcoming seasonal shift. Overall, September’s weather balances the lingering warmth of summer with the anticipation of fall, creating a diverse tapestry of climate experiences for Edgartown residents and visitors alike.

September Precipitation Trends in Edgartown

The chart displays monthly precipitation patterns in Edgartown, 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.
JanFebMarAprMayJunJulAugSepOctNovDec93118116134119908486117168103129
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Edgartown

In September, humidity in Edgartown settles at a comfortable 75%, reflecting a subtle shift as summer gives way to fall. This marks a slight decline from the 76% experienced in the previous two months, August and July, suggesting a transition into crisper, drier days. Throughout the year, Edgartown's humidity levels showcase a clear trend: they remain relatively high during the winter months, peaking at 84% in both January and February. As the seasons progress towards summer, humidity dips gradually, reaching its lowest in late summer and early fall. With September’s humidity, residents and visitors alike can enjoy the pleasant blend of warmth and gentle breezes typical of early autumn, while also anticipating the slight increase as the month transitions into October.

September Average Humidity in Edgartown

This chart illustrates the average monthly humidity levels in Edgartown, 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%84%82%79%75%78%76%76%76%75%80%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Edgartown

As summer transitions into fall in Edgartown, the UV Index remains notably high in September, with an index of 8, classifying it as very high. This marks a slight decrease from the peak summer months of July and August, both at 9, but the burn time remains consistent at just 15 minutes. It’s a season where the sun can still deliver strong rays, reminding residents and visitors alike to stay vigilant and protect their skin. Consequently, September serves as a pivotal reminder that summer's UV intensity lingers longer than one might expect. To learn more about the UV trends throughout the year, check out the detailed insights at Edgartown UV Index.

Maximum UV Index Levels in Edgartown for September

The chart shows the monthly maximum UV Index (UVI) for Edgartown 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.
JanFebMarAprMayJunJulAugSepOctNovDec3468910998642
Data source: Edgartown 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 Edgartown

As September unfurls in Edgartown, the charm of summer lingers, bathed in a generous 280 hours of sunshine—a delightful retention of brightness as the warmer months wane. This month stands as a transition, distinctively brighter than the cooler beginnings of the year, such as January (142 hours) and February (184 hours), yet it marks a gentle decline from the summer peak of July (346 hours) and August (330 hours). The trend reveals a slow tapering of daylight, as nature gracefully prepares for the approach of fall. With its vibrant golden hues and temperate days, September offers a well-balanced retreat from the summer's intensity, inviting both residents and visitors to bask in the lingering warmth before the colder days set in.

Monthly Sunshine Duration in Edgartown: September Highlighted

The September sunshine duration represents the total number of hours Edgartown 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.
JanFebMarAprMayJunJulAugSepOctNovDec142h184h258h243h298h326h346h330h280h236h203h165h
Data source: Edgartown September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Edgartown During September

September in Edgartown brings a delightful 50% chance of sunny weather, making it one of the more promising months for sun-seekers. This month stands out among its predecessors, particularly following the typically overcast summer months of June and August, which see chances dip to 38% and 36% respectively. With autumn approaching, the likelihood of sunny days starts to rise again, surpassing the summer slump and aligning more closely with the sunnier months of March and May. As the days grow shorter, September offers a refreshing balance of sunlight and temperate weather, inviting visitors to enjoy the natural beauty of this coastal gem.

Percentage of Sunny Days in September in Edgartown

The chart illustrates the percentage of sunny days in Edgartown 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 Edgartown experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec41%31%60%46%41%38%41%36%50%45%54%29%
Data source: Edgartown September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Edgartown in September

September in Edgartown heralds the transition from summer to autumn, where daylight begins to wane slightly. With 12 hours of daylight, this month marks a gentle decline from the sun-drenched days of summer, peaking at 15 hours in June. As the year progresses, daylight gradually decreases, dipping to 11 hours in October and reaching just 9 hours by November. This shift not only signifies shorter days but also invites a serene beauty as the vibrant hues of fall foliage emerge, making September a perfect time to enjoy the lingering warmth of summer while gradually embracing the crispness of autumn.

Average Daylight Hours in Edgartown for September

The chart illustrates the variation in daylight duration in Edgartown throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 32m10h 36m11h 58m13h 21m14h 32m15h 7m14h 48m13h 45m12h 25m11h 2m9h 49m9h 12m
Data source: Edgartown daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Edgartown

As summer gives way to autumn in Edgartown, September's winds pick up slightly, averaging 5.9 m/s (13 mph)—a gentle increase from the languid breezes of July and August. This shift signifies the transition into a more vibrant season, where the cooling air invigorates the landscape and hints at the approaching fall. While the wind speeds in September remain moderate compared to the earlier winter months, they provide just enough gusts to rustle the leaves and dance across the shore, offering an ideal backdrop for outdoor activities. The gradual rise from summer's lull aligns with the historical trend of wind speeds increasing again in October, creating a seamless flow from balmy days into crisp evenings.

Average September Wind Speed in Edgartown

The chart displays monthly wind speed patterns in Edgartown, 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.
JanFebMarAprMayJunJulAugSepOctNovDec6.86.76.86.56.16.15.24.95.9 m/s6.66.66.4
Data source: Edgartown September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Edgartown Compares to Other Months

The weather in Edgartown 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 Edgartown and find detailed weather information for every month.

September weather in Edgartown is marked by mild temperatures, with minimums around 14°C (57°F) and maximums reaching 25°C (78°F), creating a comfortable atmosphere perfect for outdoor activities. However, the month also brings significant rainfall, averaging 117 mm (4.6 in) over 10 days, coupled with a humidity level of 75%. In contrast, January experiences a stark temperature drop, with lows plunging to -16°C (4°F) and highs only reaching 13°C (55°F). Although January has slightly lower total precipitation at 93 mm (3.7 in) over 9 days, the humidity rises to 84%, contributing to a much colder and harsher environment. For more details, you can check Edgartown weather in January.

September and February present starkly contrasting weather patterns. In September, temperatures range from a mild 14°C (57°F) to a warm 25°C (78°F), with an average of 20°C (67°F) and relatively high humidity at 75%. This month also experiences 10 days of precipitation, totaling 117 mm (4.6 in). Conversely, February is characterized 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 2°C (36°F). Precipitation is slightly higher in February, with 118 mm (4.6 in) spread over 12 days and a humidity level of 84%. For more detailed information on the February climate, you can check Edgartown weather in February.

The weather in September and March presents a striking contrast, particularly in terms of temperature. September enjoys a mild climate with average temperatures ranging from a minimum of 14°C (57°F) to a maximum of 25°C (78°F), making it a comfortable month for outdoor activities. In contrast, March is much colder, with average temperatures hovering between a minimum of -9°C (17°F) and a maximum of 13°C (55°F). Both months experience similar precipitation levels, with September receiving 117 mm (4.6 in) and March almost the same at 116 mm (4.6 in), both spread across approximately 10 days. However, March has a slightly higher humidity of 82% compared to September's 75%. For more detailed information about conditions in March, you can visit Edgartown weather in March.

In comparing the weather of September and April, it's evident that September offers significantly warmer temperatures, with averages around 20°C (67°F), while April has a cooler average of just 8°C (46°F). Additionally, September tends to be drier, with 117 mm (4.6 in) of precipitation over about 10 days, compared to April's wetter conditions, which see 133 mm (5.3 in) of rain on roughly 12 days. However, both months experience relatively high humidity levels, with September at 75% and April slightly higher at 79%. For those looking to explore April weather specifics, check out Edgartown weather in April.

When comparing the weather in September and May, noticeable differences emerge in both temperature and precipitation patterns. In September, temperatures are generally milder, ranging from a minimum of 14°C (57°F) to a maximum of 25°C (78°F), with an average of 20°C (67°F). In contrast, May is cooler, with temperatures starting at a minimum of 4°C (40°F) and peaking at 20°C (67°F), averaging only 12°C (54°F). Both months experience significant precipitation, with September receiving 117 mm (4.6 in) over about 10 days, while May sees slightly more, at 119 mm (4.7 in) over 13 days. Interestingly, humidity levels remain consistent at 75% for both months. For more detailed information, check out Edgartown weather in May.

When comparing the weather in September to that of June, September tends to be slightly warmer with average temperatures ranging from a minimum of 14°C (57°F) to a maximum of 25°C (78°F), while June has lower averages, with a minimum of 11°C (52°F) and a maximum of 23°C (74°F). September also experiences more precipitation, with 117 mm (4.6 in) over about 10 days, compared to June's 90 mm (3.5 in) over the same number of days. Additionally, humidity levels remain relatively high in both months, with September at 75% and June slightly higher at 78%. For further details on June weather specifics, you can check Edgartown weather in June.

In comparing the weather between September and July, September tends to be slightly cooler with average temperatures ranging from a minimum of 14°C (57°F) to a maximum of 25°C (78°F), whereas July features warmer conditions with temperatures from a minimum of 16°C (61°F) to a maximum of 27°C (81°F). Furthermore, September experiences more precipitation, with 117 mm (4.6 in) over about 10 days, compared to July's 84 mm (3.3 in) over 9 days. Humidity levels remain similar, with September at 75% and July at 76%. For more detailed insights, you can check Edgartown weather in July.

In comparing the weather patterns of September and August, September tends to be slightly cooler, with average temperatures ranging from a minimum of 14°C (57°F) to a maximum of 25°C (78°F), whereas August boasts a warmer range with minimums around 17°C (63°F) and maximums reaching 26°C (80°F). Additionally, September experiences more rainfall, totaling 117 mm (4.6 in) over approximately 10 days, compared to August's 86 mm (3.4 in) across 9 days. The humidity levels remain relatively similar, with September at 75% and August at 76%. For a detailed look at August weather, you can visit Edgartown weather in August.

September and October exhibit notable differences in weather patterns. In September, temperatures are generally warmer, with a minimum of 14°C (57°F) and an average of 20°C (67°F), while October sees a drop, with minimum temperatures dipping to 4°C (39°F) and an average of 15°C (60°F). Precipitation also increases in October, totaling 168 mm (6.6 in) over 12 days, compared to September's 117 mm (4.6 in) over 10 days. Despite these changes, both months maintain a consistent humidity level of 75%. For a deeper look into October conditions, you can check Edgartown weather in October.

September weather is generally mild and comfortable, with average temperatures ranging from a minimum of 14°C (57°F) to a maximum of 25°C (78°F). The month sees a fair amount of rainfall, totaling 117 mm (4.6 in) over about 10 days, and the humidity hovers around 75%. In contrast, November brings a significant drop in temperatures, where the average ranges from a chilly -6°C (21°F) to a more moderate 19°C (67°F). The precipitation is slightly less at 103 mm (4.0 in) over the same 10 days, and humidity increases to 80%. These notable differences highlight the transition from the mild warmth of September to the coolness of November. For more detailed information on November weather, you can check Edgartown weather in November.

In September, the weather is relatively mild, with average temperatures around 20°C (67°F) and maximums reaching up to 25°C (78°F). The month experiences about 117 mm (4.6 in) of precipitation over 10 days, accompanied by a humidity level of 75%. In contrast, December brings a more frigid climate, with temperatures averaging 4°C (40°F) and dipping as low as -12°C (11°F). This month sees increased precipitation levels at 129 mm (5.1 in), spread over 11 days, and slightly higher humidity at 80%. For more details on what to expect, check out Edgartown weather in December.

Compare Edgartown's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Edgartown

As summer wanes, September in Edgartown brings a refreshing shift, with moderate temperatures that contrast beautifully with the sweltering highs of July and August. While the average temperature hovers around a pleasant 20°C, expect occasional warm days at 25°C, ideal for enjoying the coastal scenery. However, this month also sees an uptick in precipitation, with about 10 days of rain contributing to a more humid atmosphere, making it distinct from the drier summer months. The blend of warm days and crisp evenings, combined with the vibrant fall foliage, makes September a unique time to experience Edgartown's charm. To learn more about the weather patterns throughout the year, visit Edgartown Climate.