Last updated: February 24, 2025
In September, Kennebunk, United States, experiences a pleasing blend of warm and cool conditions. With maximum temperatures reaching 32°C (90°F) and an average of 18°C (65°F), the month offers a delightful transition from summer to fall. However, nature reminds us of its unpredictability, as 70 mm (2.8 in) of precipitation may fall over 7 days, accompanied by a humidity level of 71%. This combination of warmth and moisture creates a vibrant atmosphere perfect for enjoying the changing landscape and preparing for the cooler months ahead.
In Kennebunk, United States, September marks a delightful transition into autumn, with temperatures reflecting a cozy warmth before the chill of winter sets in. The month typically sees minimums around 5°C (41°F), which provides a refreshing start to the days. Average temperatures hover at a pleasant 18°C (65°F), perfect for enjoying the crisp air and vibrant foliage. As the sun warms the afternoons, highs can reach a comfortable 32°C (90°F), making this a lovely time for outdoor activities and gatherings. Overall, September presents a nice balance of warmth and the first hints of the cooler months ahead, inviting residents and visitors alike to savor the beauty of early fall in this charming coastal town.
In September in Kennebunk, the landscape experiences a gentle shift as summer yields to the early whispers of autumn. The month sees an average precipitation of 70 mm (2.8 inches) spread over just 7 days, indicating a relatively dry spell compared to the wetter months of April and October. This seasonal transition is marked by a decrease in rainfall, as August boasts a mere 65 mm (2.5 inches) of precipitation over a similar number of days. Notably, September feels the last vestiges of summer warmth, leading to vibrant foliage, yet the overall trend suggests a gradual increase in moisture as the year progresses toward winter's embrace. This interplay between rainfall and seasonal change captures the unique charm of Kennebunk during this time.
As summer fades into autumn, September in Kennebunk experiences a subtle shift in humidity levels, with an average of 71% that marks a slight increase from the drier months of July and August. This transition signifies the end of the warm summer days, where humidity dipped to around 66% in August, making it the driest month of the year. The uptick in September's humidity can be attributed to the cooling temperatures and the approach of fall, which often brings more moisture-laden air. While humidity begins to rise again in October, reaching 78%, September's levels serve as a gentle reminder of the lingering warmth before the crispness of autumn takes hold. Overall, Kennebunk's humidity dance throughout the year showcases a clear pattern: higher levels in the winter months and a gradual decline during the summer, culminating in a refreshing, yet comfortable September.
As summer fades into fall, September in Kennebunk witnesses a notable shift in UV Index levels, settling at a moderate 7. This high exposure category implies that sun protection is still vital, with a burn time of just 25 minutes during midday sun. This is a slight decrease compared to the peak summer months, where indices soared to 9 and 10, necessitating swift protective measures within just 15 minutes of exposure. The trends highlight a gradual decline in UV intensity as we transition into autumn, yet caution remains essential. For more detailed information, visit the Kennebunk UV Index page.
UV Risk Categories
September in Kennebunk is a splendid month where the warmth of summer lingers, offering 288 hours of sunshine. As the skies clear post-summer, this period stands out after the peak of July and August, when the sun shines for an impressive 333 and 336 hours, respectively. After basking in such brilliance, September gracefully transitions into autumn, with slightly less light but still notably more than the colder months that follow. With the days growing shorter, the gentle sunlight transforms the town’s landscapes into a tapestry of rich colors, making it an ideal time for outdoor activities before the chill of October settles in. The overall trend highlights a delightful balance of ample sunshine, inviting residents and visitors alike to savor the last bits of summer before the fall arrives.
In Kennebunk, the likelihood of sunny weather in September stands at 43%, which is a slight uptick from the summer months. As the year progresses, September shows a promising blend of sunshine as daylight begins to wane compared to the more humid summer. The overall trend reveals a peak in sunlit days during the spring, specifically in March, where the chances soar to 62%. However, the summer months can be a bit gloomy with July and August experiencing the lowest probabilities of sunlight at 29% and 32% respectively. Interestingly, as autumn sets in, the chance of sunny days experiences a reassuring bounce, suggesting that September can indeed offer a pleasant escape into early fall foliage under clearer skies.
As summer fades, September in Kennebunk welcomes a gentle transition, offering approximately 12 hours of daylight. This marks a subtle decrease from the sun-drenched 15 hours in June and July. While the days are still delightfully long, September sets the stage for autumn's approach, with daylight gradually diminishing. Following the vibrant heights of summer, we observe a shift as daylight hours dip further in October and November, creating a rhythm of change that hints at the cozy days to come. The gradual decline from the peak of summer highlights nature's cyclical beauty, inviting residents and visitors alike to savor the last golden rays before the chill of winter sets in.
As September rolls into Kennebunk, the average wind speed picks up slightly to 3.3 m/s (7 mph), a refreshing breath that gently transitions from the calm of summer. This marks a subtle upswing compared to the languid summer months, which averaged lower at around 2.9 to 2.8 m/s (6 mph). The autumn breeze brings with it a sense of change, hinting at the briskness to come in October, where the wind speed aligns closely with the early spring months, fluctuating between 3.4 to 3.6 m/s (8 mph). Thus, September serves as a bridge, where the lingering warmth of summer meets the invigorating freshness of fall, creating an ideal setting for outdoor explorations before the chill of winter envelops the coast.
The weather in Kennebunk 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 Kennebunk and find detailed weather information for every month.
In September, the weather is notably warmer, with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 32°C (90°F), and an average of 18°C (65°F). The month experiences about 70 mm (2.8 in) of precipitation over 7 days, accompanied by a humidity level of 71%. In contrast, January brings much colder conditions, with temperatures dipping as low as -21°C (-6°F) and reaching a high of 16°C (61°F), resulting in an average of -2°C (28°F). The precipitation increases slightly to 80 mm (3.2 in) over 8 days, with humidity peaking at 86%. For more details about January weather, visit Kennebunk weather in January.
September weather is characterized by a more moderate range of temperatures, with nighttime lows averaging around 5°C (41°F) and daytime highs reaching up to 32°C (90°F). This month typically experiences 70 mm (2.8 in) of precipitation over about 7 days, with a humidity level of 71%. In contrast, February presents a much colder climate, with minimum temperatures plummeting to -18°C (0°F) and maximums only peaking at 20°C (68°F). The precipitation level increases to 90 mm (3.6 in) across 10 days, and humidity rises to 84%. For a more detailed look at winter weather patterns, check out Kennebunk weather in February.
September and March exhibit significantly contrasting weather patterns. In September, temperatures are generally more moderate, ranging from a minimum of 5°C (41°F) to a comfortable average of 18°C (65°F), with a maximum of 32°C (90°F). This month sees around 70 mm (2.8 in) of precipitation over approximately 7 days and boasts a humidity level of 71%. In contrast, March experiences much colder temperatures, with a minimum dropping to -18°C (0°F) and an average of only 2°C (35°F), rising to a maximum of 20°C (68°F). Precipitation is slightly higher at 81 mm (3.2 in), spread over 10 days, and humidity reaches 82%. For a detailed look at the weather specifics for March, you can refer to Kennebunk weather in March.
September and April present contrasting weather patterns. In September, temperatures range from a minimum of 5°C (41°F) to a comfortable average of 18°C (65°F), peaking at a warm 32°C (90°F). The month sees about 70 mm (2.8 in) of rainfall over 7 days and maintains a humidity level of 71%. In contrast, April experiences cooler temperatures, with a minimum of -4°C (26°F) and an average of 7°C (46°F), though it can still reach a maximum of 29°C (84°F). This month is wetter, with precipitation totaling 122 mm (4.8 in) over 12 days and a higher humidity of 80%. For more detailed insights on April weather, you can check Kennebunk weather in April.
The weather in September shows a broader temperature range compared to May, with minimums reaching 5°C (41°F) and maximums soaring up to 32°C (90°F), while May's minimum is slightly cooler at 2°C (35°F) and maximums only reaching 33°C (92°F). Both months experience similar precipitation levels, around 70 mm (2.8 in), but September tends to have fewer rainy days (7) compared to May’s 9. Humidity remains consistent across both months, hovering around 71% in September and 72% in May, contributing to the overall mildness of early fall and late spring in the region. For more specific insights into the weather for May, check out Kennebunk weather in May.
In comparing the weather of September and June, both months exhibit similar temperature ranges, with September showing a minimum of 5°C (41°F), an average of 18°C (65°F), and a maximum of 32°C (90°F). In contrast, June features a minimum of 5°C (41°F), an average of 19°C (66°F), and a maximum of 35°C (95°F). Precipitation levels remain consistent at 70 mm (2.8 in), though June tends to experience slightly more rainy days with 9 days of precipitation compared to 7 in September. Humidity is quite similar, with September at 71% and June at 72%. For more detailed insights on June weather, you can check out this link: Kennebunk weather in June.
In comparing the weather of July and September, we can see notable differences in temperature and precipitation patterns. July typically experiences higher average temperatures, ranging from a minimum of 13°C (56°F) to a maximum of 34°C (93°F), with an average of 22°C (72°F). In contrast, September has milder temperatures, with a minimum of 5°C (41°F) and a maximum of 32°C (90°F), averaging 18°C (65°F). Rainfall is also more prevalent in July, with 120 mm (4.7 in) of precipitation occurring over 11 days, compared to September's 70 mm (2.8 in) over 7 days. Moreover, July's humidity is slightly lower at 67%, while September's humidity rises to 71%. For more insights into Kennebunk's July weather, visit Kennebunk weather in July.
In comparing the weather between September and August, we see notable differences in temperature and precipitation patterns. September experiences cooler nights, with a minimum temperature of 5°C (41°F) compared to August's milder 11°C (52°F). On average, September is slightly cooler overall at 18°C (65°F) versus August's 22°C (72°F), although both months reach similar maximum temperatures, with September peaking at 32°C (90°F) and August at 33°C (92°F).
Precipitation is slightly higher in September, with 70 mm (2.8 in) falling across 7 days, compared to 65 mm (2.5 in) over 9 days in August. Humidity is also higher in September at 71%, whereas August has a more comfortable 66%. For those interested in the specifics of August weather, you can refer to the detailed forecast here: Kennebunk weather in August.
In September, the weather is generally warmer, with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 32°C (90°F) and an average of 18°C (65°F). The month experiences relatively less precipitation, totaling 70 mm (2.8 in) over about 7 days, and the humidity hovers around 71%. In contrast, October sees cooler temperatures, with a minimum of 0°C (32°F), an average of 12°C (54°F), and a maximum of 28°C (82°F). This month is also wetter, receiving 128 mm (5.0 in) of rain over approximately 11 days, along with a slight increase in humidity to 78%. For a more detailed look at the October climate, check out Kennebunk weather in October.
In September, temperatures typically range from a minimum of 5°C (41°F) to a maximum of 32°C (90°F), making it a warm month with an average temperature of 18°C (65°F). The precipitation level stands at 70 mm (2.8 in) over about 7 days, with humidity averaging 71%. In contrast, November brings a significant drop in temperatures, with lows plunging to -12°C (11°F) and an average of only 5°C (42°F), despite a maximum of 23°C (73°F). Additionally, November experiences higher precipitation at 107 mm (4.2 in) over approximately 10 days, along with increased humidity at 84%. For a more detailed look at what to expect, check out Kennebunk weather in November.
In September, the weather is warm and pleasant, with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 32°C (90°F) and an average temperature of 18°C (65°F). The month experiences around 70 mm (2.8 in) of precipitation over about 7 days, with humidity levels at 71%. In contrast, December brings a drastic change, with much colder temperatures that can dip to a minimum of -20°C (-4°F) and an average of 0°C (33°F), peaking at 15°C (59°F). Precipitation increases to 125 mm (4.9 in) over approximately 10 days, accompanied by higher humidity levels at 81%. For a more detailed look at December weather in this region, visit Kennebunk weather in December.
As September rolls in, Kennebunk's weather begins to shift, offering a refreshing transition between the warmth of summer and the coolness of autumn. With average temperatures around 18°C (65°F), this month enjoys a comfortable climate, though it can still peak at a balmy 32°C (90°F) on warmer days. Unlike the drier summer months, September brings an increase in precipitation, averaging 70 mm over about 7 days, leading to a more humid atmosphere at 71%. This blend of warmth and moisture not only makes for pleasant outdoor experiences but also heralds the vibrant colors of fall. For an in-depth look at the climate patterns, visit Kennebunk Climate.