Last updated: March 17, 2025
Bangor, United Kingdom, experiences a vibrant September marked by fluctuating temperatures, ranging from a maximum of 27°C (81°F) to a cooler minimum of 3°C (38°F), with an average of 14°C (57°F). This transitional month witnesses frequent rain, accumulating about 98 mm (3.9 in) over 15 days, contributing to a high humidity level of 85%. As summer lingers and autumn approaches, visitors can expect a mix of crisp breezes and occasional downpours, perfect for exploring the stunning landscapes and rich history of this charming coastal town.
As summer bids farewell in Bangor, September ushers in a delightful transition marked by a minimum temperature of 3°C (38°F) and a pleasant average of 14°C (57°F). The warmth lingers with daily highs reaching around 27°C (81°F), showcasing a noticeable drop from the peak summer months, yet still inviting for outdoor activities. This month effectively bridges the gap between summer's warmth and autumn's chill, exhibiting a gradual cooling trend that sets the stage for the crisp, colorful days ahead. With nights becoming cooler, it’s a perfect time to enjoy the last of the season's warmth before the embrace of fall takes hold.
In September, Bangor experiences a moderate drop in precipitation, accumulating 98 mm (3.9 inches) of rain over 15 days. This amount represents a significant dip from the heavy showers of August, which boasted 105 mm (4.1 inches), setting the stage for the wetter months ahead. With autumn just around the corner, September’s rainfall is a prelude to the increasingly soggy conditions that typically follow, as seen in October’s spike to 128 mm (5.1 inches). The trend indicates a shift from the lingering summer rains to a more persistent, autumnal pattern, allowing nature to prepare for the cooler, wetter months that characterize Bangor's climate.
As summer transitions into autumn, September in Bangor, United Kingdom, brings a slight uptick in humidity, resting at 85%. This marks a notable shift from the drier months of July and August, where humidity levels dipped to 78% and 79% respectively. The gradual increase aligns with the pattern of humidity typically rising during the later part of the year, as the crisp air of fall begins to envelop the region. Indeed, September’s humidity serves as a gentle reminder of the wetter months approaching, preparing residents for the more humid conditions that will follow in October, which stands at a higher 90%. The ebb and flow of Bangor's humidity reflect its maritime climate, ensuring that, even in early autumn, the air maintains a distinctive moistness.
As September rolls in, Bangor experiences a moderate UV Index of 5, with a burn time of 30 minutes. This marks a gentle decline from the very high levels seen during the peak summer months of June and July, where UV Index values hovered at 8. While autumn begins to cool things down, the sun can still deliver some strength, so it's wise to be mindful of sun exposure, particularly for those planning outdoor activities. By October, the UV Index dips further to 4, signaling a gradual shift toward lower levels of solar intensity. Embrace the changing season, but remember to protect your skin during those lingering sunny days. For more detailed information, check out the Bangor UV Index.
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As summer gives way to autumn, September in Bangor, United Kingdom, showcases a delightful balance of sunshine, boasting 315 hours of bright days. This month, while slightly lower than the sun-drenched peak of July with its impressive 421 hours, still stands out as a vibrant time of year, transitioning smoothly from the warmth of summer. The lingering rays after August's 383 hours offer a serene backdrop for the onset of fall, marking a gradual decline in daylight as the days grow shorter and the sun retreats. This trend is highlighted by the sharp drop to 238 hours in October, indicating a seasonal shift that invites communities to savor the last golden days of sunshine before embracing the cozy charm of autumn.
In Bangor, United Kingdom, the likelihood of sunny weather in September is relatively low at 20%, marking it as one of the cloudier months in the year. This trend is part of a gradual decline in sunshine probabilities as summer transitions into autumn, with peak sunniness typically occurring in April at 46%. While September still offers a taste of lingering summer warmth, it often competes with the encroaching gloom of October and November, which hover around the 17% and 19% chances of sun, respectively. Despite this, September can still surprise residents with occasional sunny spells, reminding them that even as the seasons shift, moments to bask in the sun can still be found.
As September unfolds in Bangor, United Kingdom, the transition from the sun-soaked days of summer to the cooler embrace of autumn becomes evident. The month welcomes an average of 12 daylight hours, a notable decrease from the vibrant 14 hours experienced in August. This gradual sunlight reduction is part of a larger trend, reflecting the shifting seasons as daylight diminishes toward October’s 10 hours. While September still offers plenty of opportunity for outdoor adventures, the waning hours remind us to cherish the lingering warmth before the longer nights settle in, enriching the beauty of the early autumn landscape.
As summer fades into autumn, September in Bangor, United Kingdom brings a gentle breeze with an average wind speed of 3.3 m/s (7 mph). This marks a slight decline from the more blustery days of earlier months, where wind speeds peaked in February at 5.8 m/s (13 mph). The transition from the lively winds of spring and early summer to the calmer conditions of September reflects a broader seasonal shift, as temperatures begin to cool and the crispness of fall sets in. Following this trend, October heralds a resurgence in wind speed, climbing back to 5.5 m/s (12 mph) as autumn fully takes hold, suggesting a dynamic landscape where the winds of Bangor play a crucial role in the rhythm of the changing season.
The weather in Bangor 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 Bangor and find detailed weather information for every month.
In September, the weather is generally milder, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 27°C (81°F), and an average temperature of 14°C (57°F). The month also experiences significant precipitation, totaling 98 mm (3.9 in) over approximately 15 days, accompanied by high humidity levels of 85%. In contrast, January is much colder, featuring temperatures that drop to a minimum of -3°C (27°F) and only reach a maximum of 14°C (57°F), with an average of 6°C (43°F). Additionally, January sees slightly less rainfall, with a total of 77 mm (3.0 in) spread over about 13 days and humidity levels at 89%. For more detailed insights about January weather, you can check Bangor weather in January.
September and February present notable differences in weather patterns. September generally offers a milder experience with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 27°C (81°F), featuring an average of 14°C (57°F). In contrast, February is colder, with temperatures dipping as low as -4°C (26°F) and reaching a maximum of 18°C (65°F), resulting in an average temperature of just 6°C (44°F). Both months see considerable rainfall, with September recording 98 mm (3.9 in) over 15 days and February slightly higher at 103 mm (4.1 in) over 16 days. Humidity levels are also higher in February at 88% compared to September's 85%. For further details on February's weather, visit Bangor weather in February.
In comparing the weather between September and March, we see notable differences in temperature and precipitation patterns. September generally presents milder temperatures, ranging from a minimum of 3°C (38°F) to a maximum of 27°C (81°F), with an average of 14°C (57°F). In contrast, March experiences colder conditions, with a minimum of -5°C (23°F) and an average of only 7°C (45°F). Precipitation levels are relatively close, as September receives 98 mm (3.9 in) over 15 days, while March sees slightly more with 104 mm (4.1 in) but over 18 days, resulting in a wetter month despite the colder weather. Humidity remains high in both months, with September at 85% and March slightly higher at 86%. For more detailed information about weather specifics in March, you can visit Bangor weather in March.
In comparing the weather between September and April, September tends to be warmer overall, with average temperatures ranging from 3°C (38°F) to 27°C (81°F), while April experiences cooler averages from -1°C (31°F) to 22°C (72°F). Despite September's higher temperatures, it also brings more rainfall, averaging 98 mm (3.9 in) over 15 days, compared to April's 55 mm (2.2 in) spread over 11 days. Both months exhibit high humidity levels, with September slightly higher at 85% compared to April's 84%. For a closer look at April's weather specifics, you can check Bangor weather in April.
When comparing the weather in September and May, we can see distinct differences in temperature and precipitation. September enjoys a wider temperature range, with lows reaching 3°C (38°F) and highs soaring up to 27°C (81°F), resulting in an average of 14°C (57°F). This month also experiences higher precipitation levels, totaling 98 mm (3.9 in) over approximately 15 days, coupled with a relative humidity of 85%.
In contrast, May starts off with cooler temperatures, featuring a minimum of 0°C (32°F) and an average high of 28°C (82°F), with an overall average of 12°C (53°F). Rainfall is less frequent, with only 71 mm (2.8 in) falling over about 12 days, and humidity sits slightly lower at 79%. For more details, you can check out Bangor weather in May.
When comparing the weather in September and June, we see some notable differences. September typically experiences temperatures ranging from a minimum of 3°C (38°F) to a maximum of 27°C (81°F), with an average of 14°C (57°F). This month also sees a higher average humidity of 85% and slightly more precipitation at 98 mm (3.9 in) over about 15 days. In contrast, June has a minimum temperature of 5°C (41°F) and a maximum of 29°C (84°F), with an average temperature of 15°C (59°F). The precipitation in June is slightly lower at 91 mm (3.6 in) across about 14 days and a lower humidity of 81%. For a detailed look at weather conditions in June, you can visit Bangor weather in June.
When comparing the weather in September to that of July, notable differences emerge. In September, temperatures range from a minimum of 3°C (38°F) to a maximum of 27°C (81°F), resulting in an average of 14°C (57°F), which is a bit cooler than July’s minimum of 7°C (45°F) and average of 16°C (61°F). While both months experience precipitation on about 15 days, September sees slightly more rainfall at 98 mm (3.9 in) compared to July's 82 mm (3.2 in). Additionally, September has higher humidity at 85%, whereas July maintains a lower humidity level at 78%. For more details on July weather, you can visit Bangor weather in July.
In comparing the weather of September and August, September presents a cooler climate, with minimum temperatures dropping to 3°C (38°F) compared to August’s 8°C (46°F). The average temperature in September is also slightly lower at 14°C (57°F) versus August’s 16°C (61°F), despite September seeing a maximum temperature rise to 27°C (81°F), marginally higher than August's 26°C (79°F). Precipitation levels in September are slightly less at 98 mm (3.9 in) over 15 days, while August experiences 105 mm (4.1 in) over 19 days, indicating a wetter month overall. Additionally, humidity remains higher in September at 85%, compared to 79% in August, contributing to a more muggy feel. For further details on August weather, you can refer to Bangor weather in August.
In comparing September and October weather, September tends to have milder temperatures, ranging from a minimum of 3°C (38°F) to a maximum of 27°C (81°F), with an average of 14°C (57°F). The month sees about 98 mm (3.9 in) of precipitation over 15 days, accompanied by humidity levels around 85%. In contrast, October introduces cooler temperatures, with minimums dropping to -2°C (29°F) and a maximum of 22°C (71°F), averaging 11°C (53°F). This month also experiences increased precipitation, totaling 128 mm (5.1 in) over 18 days and a slight rise in humidity to 90%. For more detailed insights, you can check Bangor weather in October.
In comparing the weather between September and November, it is clear that November offers a noticeable drop in temperatures, with averages plummeting from 14°C (57°F) in September to 9°C (48°F). September showcases warmer highs up to 27°C (81°F) while November reaches only a maximum of 15°C (60°F). Precipitation levels are slightly higher in November, with 111 mm (4.4 in) over 19 days compared to September's 98 mm (3.9 in) across 15 days. Additionally, November experiences increased humidity, averaging 91% compared to September's 85%. For a more detailed view of weather conditions during this month, you can visit Bangor weather in November.
September and December showcase a distinct contrast in weather patterns. September temperatures range from a minimum of 3°C (38°F) to a pleasant maximum of 27°C (81°F), averaging 14°C (57°F), while December experiences colder conditions with temperatures ranging from -1°C (30°F) to a maximum of 13°C (56°F) and averaging just 7°C (45°F). Additionally, precipitation increases in December, totaling 129 mm (5.1 in) over 20 days, compared to September's 98 mm (3.9 in) spread over 15 days. Humidity also rises slightly in December to 89%, up from September's 85%. For more details on December weather, visit Bangor weather in December.
As September arrives in Bangor, the weather begins to shift, offering a unique mix of warmth and the onset of autumn. While daytime temperatures can still reach a pleasant 27°C, the average cools to around 14°C, signaling the transition from summer's heat. Evenings can turn brisk, dropping to 3°C, which contrasts sharply with the warmer months preceding it. With 85% humidity and approximately 98 mm of rainfall over 15 days, September sees an increase in precipitation, making it one of the wetter months. This blend of rainfall and cooling temperatures creates a tapestry of changing colors in the landscape, setting the stage for the vibrant autumn months ahead. For a deeper understanding of Bangor's climatic patterns, explore Bangor Climate.