Last updated: February 24, 2025
September in Provincetown, United States showcases a delightful transition into fall, characterized by a maximum temperature of 26°C (79°F) and a pleasant average of 19°C (66°F). As the month progresses, temperatures dip to a minimum of 13°C (56°F), providing a refreshing chill that complements the vibrancy of the season. However, be prepared for some moisture, as 109 mm (4.3 in) of rain may grace 9 days, contributing to the area's lush landscapes. With humidity levels hovering around 75%, the air remains rich and invigorating, making it an ideal time for outdoor exploration and enjoying the stunning coastal views.
In September, Provincetown begins to transition from the warmth of summer to the crispness of fall. With minimum temperatures around 13°C (56°F) and an average reaching 19°C (66°F), the days remain pleasantly mild, making it a great time for outdoor activities. The maximum temperature peaks at 26°C (79°F), allowing for plenty of sunshine and comfortable evenings. This trend marks a shift from the intense warmth of July and August, which see highs of 28°C (82°F), to a more temperate climate, inviting locals and visitors alike to relish the beauty of early autumn along the picturesque coastline. The gradual cooling reflects the changing seasons, providing a perfect backdrop for exploring Provincetown's vibrant culture and stunning landscapes.
September ushers in a notable shift in precipitation patterns for Provincetown, bringing an average rainfall of 109 mm (4.3 in) over approximately 9 days. This marks an increase from the drier summer months, such as August, which saw only 71 mm (2.8 in) across 7 days. The arrival of fall is marked by a gradual rise in rainfall leading into October, known for its significantly higher precipitation at 167 mm (6.6 in). This trend suggests that as the season transitions, Provincetown experiences a return to wetter weather, setting the stage for the more substantial rainfalls characteristic of autumn. It's a time when the landscape transforms, benefiting both nature and the cozy atmosphere of the town.
September in Provincetown marks a subtle transition in humidity levels as summer wanes. With an average humidity of 75%, the air is still relatively comfortable, maintaining the mild, salty breezes that characterize this coastal gem. This follows a trend observed from the preceding months, where humidity gradually declines from a peak of 84% in January and February down to 76% in the warmer summer months of July and August. As the season shifts, September heralds a slight drop, hinting at the crispness of autumn to come, while still embracing the lingering warmth of the late summer sun. This balance creates an inviting atmosphere for both locals and visitors, making it an ideal time to enjoy the outdoors before the cooler months settle in.
As summer fades into autumn, September in Provincetown, Massachusetts, sees a decline in the UV Index, reflecting a shift in sun intensity. With a UV Index of 7, categorized as high, the burn time increases to around 25 minutes, offering a moderate window for sun exposure compared to the peak summer months. This gentle tapering from the very high levels of the summer—where indices reached 9 or 10—signals a transition, encouraging beachgoers and outdoor enthusiasts to still enjoy the sun while remaining mindful of potential skin damage. As October approaches, expect a further drop to a 6, maintaining a high exposure category. Stay informed and protected during your time outdoors by checking the Provincetown UV Index.
UV Risk Categories
As summer gives way to fall, September in Provincetown, United States, continues the trend of abundant sunshine, offering 275 hours of radiant light. This month showcases a gradual decline from the peak of 338 hours in July, yet it remains notably bright compared to the cooler months ahead, such as 226 hours in October. The pattern reveals a gradual transition from the height of summer to the crispness of autumn, making September a delightful time to enjoy the outdoors. Visitors can relish the lingering warmth of summer while basking in a softer, golden light that hints at the seasonal changes to come. This rich interplay of sunshine not only enhances Provincetown's charm but also invites leisurely strolls along its picturesque shores.
As September rolls into Provincetown, the promise of sunny weather begins to rise, boasting a 48% chance of sunshine, making it one of the sunniest months of the year. This marks a notable increase compared to the summer months of July and August, which see slightly lower chances at 36% and 34% respectively. Not only does September benefit from the post-summer warmth, but it also transitions into a season where conditions can be surprisingly pleasant, even as fall approaches. With the likelihood of sunny days surpassing some early autumn months like January, February, and June, visitors can expect a delightful mix of sunshine to accompany their late-summer adventures in this charming coastal town.
In Provincetown, September marks a gentle transition as daylight begins to wane, offering about 12 hours of sunshine. This slight decrease from the summer peak of 15 hours in June reflects the gradual shift towards autumn. The month follows a pattern seen throughout the year, where daylight duration increases steadily from the depths of winter, reaching its zenith in midsummer, before embarking on a gradual decline. As the vibrant summer days give way to the crispness of fall, September provides a perfect balance of light, allowing residents and visitors to savor the lingering warmth and beauty of the changing seasons. With each passing day, the sunlight becomes a precious companion as it heralds the onset of shorter days ahead.
In September, Provincetown's wind begins to pick up again, with an average speed of 6.2 m/s (14 mph), mirroring the breezy conditions of late spring. This revival from the summer's gentle zephyrs, which drop to an average of just 4.9 m/s (11 mph) in August, marks a notable trend as the region transitions towards autumn. As the warmer months give way to the cooler fall air, the wind's resurgence heralds a refreshing change, making September an enticing time for outdoor activities along the picturesque coastline. Following September, wind speeds continue their steady climb into October and November, punctuating the seasonal shift with brisk and invigorating breezes.
The weather in Provincetown 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 Provincetown and find detailed weather information for every month.
In September, the weather is quite mild, with temperatures averaging around 19°C (66°F), reaching a maximum of 26°C (79°F). Although it experiences a fair amount of rainfall, with 109 mm (4.3 in) over 9 days, the humidity level is a comfortable 75%. In contrast, January brings a stark chill, where temperatures plummet to an average of just 2°C (36°F), with lows reaching -13°C (9°F) and a maximum of only 13°C (55°F). The precipitation is slightly lower at 94 mm (3.7 in) over 10 days, but the humidity rises to 84%, creating a distinctly crisp atmosphere. For more details on January weather in Provincetown, check Provincetown weather in January.
When comparing the weather in September and February, the differences are striking. September boasts milder temperatures, with a minimum of 13°C (56°F) and averages around 19°C (66°F), peaking at a comfortable 26°C (79°F). In contrast, February experiences much colder conditions, featuring a minimum of -12°C (11°F) and an average of 2°C (36°F), with a maximum reaching only 11°C (53°F). Precipitation levels are fairly similar; September sees about 109 mm (4.3 in) over 9 days, while February has slightly higher precipitation at 115 mm (4.5 in) over 11 days. Additionally, February's humidity rises to 84%, compared to September's 75%. For more detailed information on February weather, you can visit Provincetown weather in February.
In comparing the weather of September and March, it's clear that September offers a significantly warmer climate, with average temperatures ranging from a cool 13°C (56°F) to a pleasant 26°C (79°F). In contrast, March tends to be much chillier, with average temperatures only reaching a maximum of 13°C (55°F) and dipping as low as -9°C (17°F). Both months experience considerable precipitation, with September averaging 109 mm (4.3 in) over 9 days and March slightly higher at 116 mm (4.6 in) across 11 days. Additionally, March sees a higher humidity level at 82%, compared to September's 75%. For a more detailed look at March weather specifics, you can visit Provincetown weather in March.
In September, temperatures are generally more pleasant, with average highs reaching up to 26°C (79°F), while April sees much cooler temperatures, averaging only 7°C (45°F). The warmer September climate allows for milder conditions, though it does experience more rainfall over fewer days, with 9 days of precipitation totaling 109 mm (4.3 in). In contrast, April is characterized by chillier weather, having a higher amount of precipitation at 134 mm (5.3 in) over 12 days, and slightly higher humidity at 79%. For those interested in the specifics of April weather, you can find more information here: Provincetown weather in April.
In September, temperatures are generally warmer, with a minimum of 13°C (56°F) and an average of 19°C (66°F), while May sees a cooler minimum of 4°C (40°F) and an average of 11°C (52°F). Maximum temperatures in September can reach up to 26°C (79°F), compared to May's peak of 20°C (69°F). Precipitation levels are relatively similar, with September receiving 109 mm (4.3 in) over about 9 days, compared to May's 102 mm (4.0 in) spread over 11 days. Both months experience a consistent humidity level of 75%. For more detailed information on May's weather, check out Provincetown weather in May.
When comparing the weather in September to June, several notable differences emerge. In September, the temperatures are generally warmer, with an average of 19°C (66°F), compared to June's cooler average of 17°C (62°F). September also sees higher maximum temperatures, reaching up to 26°C (79°F), while June peaks at 24°C (75°F). Precipitation in September is slightly heavier, with 109 mm (4.3 in) over 9 days, compared to June's 89 mm (3.5 in) over the same number of days. Humidity levels are similar, with September at 75% and June at 78%, creating a comfortable yet mildly humid climate during both months. For more detailed information about June weather in Provincetown, you can check Provincetown weather in June.
In comparing the weather of September and July, September tends to be slightly cooler, with minimum temperatures averaging 13°C (56°F) compared to July's minimum of 16°C (60°F). The average temperature in September is 19°C (66°F), while July boasts a warmer average of 21°C (69°F). Both months experience similar humidity levels, with September at 75% and July at 76%. Additionally, September has a higher amount of precipitation, measuring 109 mm (4.3 in) over 9 days, compared to July's 91 mm (3.6 in) over 8 days. For more detailed information on July weather, you can check Provincetown weather in July.
In comparison to August, September experiences cooler temperatures, with a minimum of 13°C (56°F) compared to August's 16°C (61°F). The average temperature drops slightly from 21°C (71°F) in August to 19°C (66°F) in September, while the maximum temperature is similar, with September reaching up to 26°C (79°F) versus August's 27°C (82°F). Precipitation also increases in September, totaling 109 mm (4.3 in) over 9 days, in contrast to August's 71 mm (2.8 in) over just 7 days. Humidity levels are fairly consistent, with September at 75% and August at 76%. For more specific details about August's weather, you can check Provincetown weather in August.
In comparing the weather patterns of September and October, a noticeable shift can be observed. September tends to be milder, with average temperatures ranging from a minimum of 13°C (56°F) to a maximum of 26°C (79°F), while October experiences cooler temperatures, featuring a minimum of 4°C (40°F) and a maximum of 21°C (71°F). Additionally, October sees an increase in precipitation, totaling 167 mm (6.6 in) over 11 days, compared to September's 109 mm (4.3 in) across 9 days. Despite the increasing rainfall, both months maintain a consistent humidity level of 75%. For a closer look at the specifics, you can explore the details here: Provincetown weather in October.
September and November offer contrasting weather experiences. In September, temperatures are milder, with a minimum of 13°C (56°F) and an average of 19°C (66°F), peaking at 26°C (79°F). The month sees about 109 mm (4.3 in) of precipitation over approximately 9 days and has a humidity level of 75%. In contrast, November brings cooler conditions, with temperatures dropping significantly to a minimum of -7°C (19°F), averaging 9°C (48°F), and reaching a maximum of 19°C (66°F). Precipitation is slightly lower at 103 mm (4.1 in) but occurs over more days, totaling 11, with humidity rising to 80%. For more detailed insights, check out Provincetown weather in November.
September and December offer strikingly different weather conditions. In September, temperatures range from a mild minimum of 13°C (56°F) to a pleasant maximum of 26°C (79°F), with an average of 19°C (66°F). The month sees about 109 mm (4.3 in) of precipitation over 9 days, accompanied by 75% humidity, creating a relatively warm and humid atmosphere. In contrast, December brings much colder weather, with temperatures plunging to a minimum of -11°C (12°F) and only reaching a maximum of 15°C (59°F), averaging just 4°C (40°F). This winter month experiences slightly more precipitation at 132 mm (5.2 in) over 12 days, with humidity rising to 80%, contributing to the chilly, damp conditions characteristic of the season. For a more detailed look at the conditions, you can check Provincetown weather in December.
As summer gives way to autumn, September in Provincetown presents a delightful shift in weather, marked by milder temperatures and increased humidity. Visitors can expect comfortable days with average conditions that are pleasantly warmer than the brisk, cooler months ahead, yet refreshingly cooler compared to the peak summer heat. With about a third of the month seeing some precipitation, it's a time when the landscape flourishes, although a light jacket might be needed for those evening strolls by the shore. For a more in-depth look at the patterns and nuances of Provincetown's climate, check out Provincetown Climate.