Last updated: February 24, 2025
In September, York Harbor, United States experiences a dynamic climate, with temperatures ranging from a minimum of 4°C (40°F) to a maximum of 33°C (91°F), creating a comfortable average of 18°C (65°F). This month typically brings 75 mm (2.9 in) of rainfall over approximately 7 days, contributing to a humidity level of 71%. As summer transitions to fall, the weather invites residents and visitors to enjoy the scenic beauty of the region while preparing for the cooler days ahead.
In September, York Harbor experiences a delightful transition from the sweltering summer months to the more temperate days of autumn. The temperatures range from a minimum of 4°C (40°F) to a comfortably warm maximum of 33°C (91°F), contributing to an average of 18°C (65°F). This signifies a slight dip from August, yet the warmth lingers, inviting residents and visitors to savor the shifting seasons. As the month progresses, the cooler nights juxtaposed with pleasantly warm afternoons create an ideal climate for outdoor activities. Overall, September serves as a precursor to the crisp, vibrant autumn that follows, making it a season of perfect balance in York Harbor.
In September, York Harbor experiences a relatively mild shift in precipitation, with 75 mm (2.9 in) falling over 7 days. This amount is slightly lower than the previous summer months, suggesting a gradual transition towards the drier autumn season. Notably, while July and April stand out as the wettest months, September's totals reflect a return to the moderate levels seen in May and August. As the region prepares for the briskness of October, this marked decrease in rainfall heralds the onset of cooler, clearer days typical of fall, making the weather in York Harbor both refreshing and inviting.
In September, humidity in York Harbor, United States, settles at 71%, marking a slight increase from the drier summer months of July and August, which recorded 67% and 66% respectively. This transition into fall signals a gradual return to more humid conditions as the summer heat dissipates. Compared to the higher humidity levels seen earlier in the year—peaking at 86% in January—September balances comfort with just enough moisture to hint at the approaching cooler months. This pattern suggests a natural ebb and flow, where the humidity tends to rise as autumn approaches, before peaking again in the winter months.
As September rolls into York Harbor, the UV Index decreases to 7, indicating a shift from the peak summer months. This points to a high exposure category, requiring a burn time of 25 minutes for unprotected skin. Although it’s lower than the intense summer levels of 9 and 10, the September sun still demands attention. The trend shows a gradual drop in UV radiation as summer fades, leading into the more moderate levels of October. For those planning outings, it’s essential to remain vigilant about sun safety during this transitional month. For more insights, visit York Harbor UV Index.
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As summer gracefully fades into fall, September in York Harbor offers a delightful 285 hours of sunshine, a warming embrace following the sun-soaked months of June and August, which peak at 330 and 337 hours, respectively. The steady climb from January's modest 150 hours showcases the arrival of longer days, culminating in a vibrant summer. As autumn approaches, the sunlight begins to wane, but September still boasts a considerable glow, making it an ideal time to savor the outdoors before the chill of October, which sees a significant drop to just 221 hours. This transition hints at the changing seasons, encouraging residents and visitors alike to soak in the last rays of summer while preparing for the cozy embrace of fall.
In September, York Harbor enjoys a 43% chance of sunny weather, marking a slight uptick from the summer months of July and August, which see only 30% and 32% sunshine, respectively. This increase in sunny days can make September a more inviting time to experience the coastal charm of York Harbor, as the summer crowds dissipate and the weather remains mild. Interestingly, September's sunshine probability also surpasses several months earlier in the year, notably April's 38% and May's 37%, suggesting a late-summer resurgence in pleasant conditions. As autumn approaches, the likelihood of sunshine shifts, with November emerging as a surprise contender with a 55% chance of clear skies, hinting at the region's variability in weather as seasons change.
As summer fades into autumn, September in York Harbor brings a gentle decrease in daylight, offering around 12 hours of sunlight each day. Following the long, sun-drenched days of June and July, which basked in 15 and 14 hours, respectively, September marks a transition into shorter days. This gradual reduction continues as the year progresses, with October dipping to 10 hours and November returning to 9 hours. The pattern underscores a seasonal rhythm, where daylight gradually diminishes, creating a cozy atmosphere perfect for savoring the last warm days before winter approaches. Enjoy the lingering light while it lasts, as it serves as a reminder of the vibrant summer just passed.
In September, the winds in York Harbor pick up slightly as summer transitions into fall, with an average speed of 3.1 m/s (7 mph). This marks a modest increase from the quieter months of July and August, which saw their lowest averages of 2.8 m/s (6 mph) and 2.7 m/s (6 mph), respectively. Overall, September's winds reflect a subtle resurgence, hinting at the changing seasons, while remaining generally mellow compared to the more robust breezes of spring, which peaked at 4.2 m/s (9 mph) in March. This gentle gusting creates a serene atmosphere, perfect for enjoying the beauty of the harbor as summer's warmth begins to wane.
The weather in York Harbor 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 York Harbor and find detailed weather information for every month.
In September, temperatures range from a minimum of 4°C (40°F) to a maximum of 33°C (91°F), with an average of 18°C (65°F). The month sees 75 mm (2.9 in) of precipitation over about 7 days, accompanied by a humidity level of 71%. In contrast, January experiences much colder weather, with temperatures ranging from a chilling minimum of -21°C (-6°F) to a maximum of 17°C (62°F), averaging -2°C (28°F). This month has slightly higher precipitation at 77 mm (3.0 in) and more frequent rainfall, occurring over 8 days, alongside high humidity levels of 86%. For a detailed look at what to expect in January, check out York Harbor weather in January.
When comparing the weather in September and February, the contrasts are striking. September offers a warm average temperature of 18°C (65°F), with highs reaching up to 33°C (91°F) and relatively lower humidity at 71%. In contrast, February is characterized by much colder temperatures, with an average of -1°C (30°F) and a chilling minimum of -17°C (1°F), alongside higher humidity levels at 84%. Precipitation is also notably different, with September experiencing about 75 mm (2.9 in) over 7 days, while February sees a slightly higher amount of 93 mm (3.7 in) spread over 10 days. For a more detailed perspective on February conditions, you can check this link: York Harbor weather in February.
September and March present striking contrasts in weather patterns. In September, temperatures range from a pleasant 4°C (40°F) to a warm 33°C (91°F), with an average of 18°C (65°F), while March experiences a much colder climate with a minimum of -17°C (2°F) and an average of just 2°C (36°F). While September has 75 mm (2.9 in) of precipitation over about 7 days, March sees slightly more precipitation at 85 mm (3.4 in) over 9 days, accompanied by a higher humidity level of 82%. For more details on March weather specifics, you can explore York Harbor weather in March.
In comparing the weather of September and April, we observe distinct differences in temperature and precipitation patterns. September boasts a broader temperature range, with minimums around 4°C (40°F) and maximums peaking at 33°C (91°F), leading to an average of 18°C (65°F). In contrast, April experiences colder nights with minimum temperatures dropping to -3°C (26°F) and a significantly lower average of 8°C (46°F), although it can still reach highs of 30°C (86°F).
When it comes to precipitation, April is wetter, accumulating 131 mm (5.1 in) over approximately 12 days, while September sees less rainfall at 75 mm (2.9 in) across 7 days. Additionally, humidity levels are higher in April at 80% compared to September's 71%. For more detailed insights into April's climate, check out York Harbor weather in April.
When comparing the weather in September and May, both months display pleasant temperatures but with notable differences. September typically enjoys a wider temperature range, with minimums around 4°C (40°F) and maximums peaking at 33°C (91°F), while May's temperatures are a bit milder, ranging from a minimum of 2°C (35°F) to a maximum of 34°C (93°F). Interestingly, both months have similar average precipitation, with September at 75 mm (2.9 in) over 7 days and May slightly lower at 74 mm (2.9 in) over 10 days, indicating that May experiences more rainy days but slightly less total precipitation. Humidity levels are also comparable, sitting around 71% for September and 72% for May. For further details on May weather, you can check York Harbor weather in May.
When comparing the weather in September and June, we see that both months have similar average temperatures, with September averaging 18°C (65°F) and June slightly warmer at 19°C (67°F). However, the maximum temperatures peak higher in June, reaching up to 35°C (95°F) compared to September's 33°C (91°F). Precipitation is also notable in both months, with June experiencing a bit more rainfall at 84 mm (3.3 in) over 11 days, while September has 75 mm (2.9 in) over 7 days. Humidity levels remain fairly close in both months, hovering around 71% in September and 72% in June. For those interested in more details, you can check out the York Harbor weather in June.
In comparing the weather of September and July, we notice distinct differences in temperature and precipitation. September experiences a broader temperature range, with minimums dropping to 4°C (40°F) and maximums reaching up to 33°C (91°F). In contrast, July maintains milder minimum temperatures at 12°C (54°F) and peaks at a warmer 36°C (97°F). Precipitation is also greater in July, totaling 131 mm (5.2 in) over 13 days compared to September's 75 mm (2.9 in) over just 7 days. Interestingly, humidity levels are slightly higher in September at 71%, while July holds at 67%. For a detailed look at July's weather, you can refer to this link: York Harbor weather in July.
In comparing the weather of September to that of August, September tends to be cooler overall, with minimum temperatures dropping to 4°C (40°F) compared to August's minimum of 10°C (51°F). The average temperature in September is also lower, at 18°C (65°F), while August averages 22°C (72°F). Despite these cooler temperatures, September can still reach a maximum of 33°C (91°F), just shy of August's peak of 34°C (94°F). Precipitation levels are quite similar, with September recording 75 mm (2.9 in) over 7 days and August nearly matching that at 77 mm (3.0 in) across 9 days. However, September is slightly more humid, with levels reaching 71% in contrast to August's 66%. For a closer look at the weather in August, you can visit York Harbor weather in August.
September and October display a noticeable shift in weather patterns. In September, temperatures range from a minimum of 4°C (40°F) to a maximum of 33°C (91°F), with an average of 18°C (65°F) and 75 mm (2.9 in) of precipitation over 7 days. Humidity sits at 71%, contributing to a warm and often humid atmosphere. In contrast, October brings cooler conditions, with minimum temperatures dropping to -1°C (31°F) and an average of 12°C (54°F). The maximum temperature is also lower at 28°C (83°F), but rainfall increases significantly to 132 mm (5.2 in) over 11 days, along with higher humidity levels at 78%. This transition marks a clear move towards more autumnal weather. For more detailed insights on October conditions, check out York Harbor weather in October.
September and November present a stark contrast in weather conditions. In September, temperatures range from a mild minimum of 4°C (40°F) to a warm maximum of 33°C (91°F), with an average of 18°C (65°F). The month experiences about 75 mm (2.9 in) of precipitation over 7 days and a humidity level of 71%. In contrast, November sees much cooler temperatures, with a minimum of -13°C (9°F) and an average of 5°C (41°F), peaking at a maximum of 23°C (74°F). The precipitation amounts to 107 mm (4.2 in) spread over 10 days, along with increased humidity at 84%. For more detailed insights on weather conditions specific to this time, you can refer to York Harbor weather in November.
September and December present strikingly different weather patterns. In September, temperatures range from a minimum of 4°C (40°F) to a maximum of 33°C (91°F), with an average of 18°C (65°F) and relatively moderate humidity at 71%. The month experiences around 75 mm (2.9 in) of precipitation over approximately 7 days, creating a warm and occasionally humid environment. In contrast, December is much colder, with temperatures ranging from a chilling -21°C (-5°F) to a maximum of 16°C (60°F), averaging around 0°C (32°F). The humidity rises to 81%, and precipitation increases to 130 mm (5.1 in), spread across about 10 days. This shift signifies a transition from the warmth of early fall to the deep chill of winter. For more details about December weather, visit York Harbor weather in December.
As summer winds down, September in York Harbor offers a unique blend of warm days and cool nights, making it distinctly different from the more intense heat of July and August. With average temperatures hitting a comfortable 18°C (65°F) and occasional peaks reaching up to 33°C (91°F), it's a transitional month that invites outdoor activities without the sweltering humidity of high summer. However, the increased precipitation, totaling 75 mm (2.9 in) over about a week, signifies a shift towards the wetter conditions associated with fall. The 71% humidity complements the coastal climate, creating a refreshing atmosphere suited for those looking to relish the natural beauty before the chill of autumn. For more detailed insights into seasonal trends, visit York Harbor Climate.