Last updated: March 17, 2025
In September, Sennen, United Kingdom, experiences a blend of mild temperatures and frequent rainfall. The maximum daytime temperature hovers around 20°C (69°F), while the average settles at a comfortable 16°C (61°F), dipping to a minimum of 11°C (53°F) during the night. This month witnesses approximately 73 mm (2.9 in) of rainfall over 13 days, contributing to the region's lush greenery. With an average humidity of 84%, the air remains notably moist, creating an inviting atmosphere for those exploring this charming coastal village.
In September, Sennen experiences a mild transition toward autumn, with temperatures ranging from a pleasant 11°C (53°F) at night to 20°C (69°F) during the day. This month maintains a comfortable average of 16°C (61°F), reflecting a subtle warmth before the cooler months set in. Compared to the peak summer months, where temperatures soar to a maximum of 21°C (71°F) in July, September offers a gentle decline, yet still invites outdoor activities amidst the hues of early fall. With early evenings becoming cooler, visitors can expect a lovely blend of warm days and crisp nights, making it an ideal time to explore the scenic coastline and stunning landscapes of this charming coastal village.
September in Sennen, United Kingdom, marks a notable transition in precipitation patterns. With an average rainfall of 73 mm (2.9 in) spread over 13 days, it stands as a prelude to the wetter months ahead. This increase is evident compared to the drier summer months of July and August, which received 66 mm and 58 mm respectively. As autumn sets in, the frequency of rainy days begins to climb, hinting at the upcoming October peaks. Overall, September gently eases Sennen into the season of increased rainfall, setting the stage for the heavy downpours that characterize the later months of the year.
As summer transitions to autumn in September, Sennen experiences a slight dip in humidity, with levels averaging 84%. This marks a subtle decrease from the consistent 85% seen during the height of the summer months. The humidity in September reflects the general trend of gradual decline as the year progresses, with the region enjoying moderately high moisture levels from January to May before stabilizing. Overall, Sennen's humidity remains relatively high throughout the year, but September hints at the approaching crispness of autumn, setting a soothing backdrop for the changing season.
As summer transitions into autumn, the September UV Index in Sennen, United Kingdom reflects a notable shift. After experiencing peak values of 8 in July and August, September's index drops to 6, indicating a high exposure category. With a burn time of just 25 minutes, sunseekers should remain vigilant, as UV levels remain significant. This pattern shows a gradual decline from the summer highs, yet still necessitates sun protection measures. As daylight shortens and cooler temperatures set in, the risk remains prominent, urging visitors and locals alike to stay informed. For more on how to protect yourself from UV rays, check out the Sennen UV Index.
UV Risk Categories
September in Sennen, United Kingdom, is a month that beautifully bridges the vibrant summer and the calm autumn. With 330 hours of sunshine, it stands as a delightful contrast to the winter months that follow, showcasing a notable decrease from the sun-drenched July, which boasts 426 hours. As summer wanes, the sun's glow gently lingers, offering a warm farewell before the inevitable decline. The trend in sunshine hours from January's mere 96 hours to September highlights a steady ascent towards the peak of summer, followed by a gradual tapering as the year progresses. This enchanting fall month invites visitors to revel in the lingering warmth, making it an ideal time to explore Sennen’s picturesque landscapes before the chill sets in.
September in Sennen, United Kingdom, brings a 33% chance of sunny weather, marking a slight dip from the summer months, which typically boast higher probabilities of sunshine. While August enjoys a robust 36% chance, September signals the transition into autumn, with the likelihood of sunny days still holding strong compared to the winter months ahead. Notably, the chances of sun in September are only slightly lower than in June (32%) and July (42%), highlighting that while summer's vibrant days begin to wane, September still offers a fair share of sunlight, making it a pleasant time to experience the coastline’s natural beauty.
As summer fades in September, Sennen, United Kingdom experiences a gentle transition in daylight, with the duration settling at 12 hours. This marks a noticeable decline from the sun-drenched months of June and July, where the days stretched to a generous 16 hours and 15 hours, respectively. With each passing month, daylight hours begin their slow retreat, gradually shifting from the vibrant energy of summer toward the shorter, cozier days of autumn. Interestingly, September offers more daylight than its predecessor, August, emphasizing the lingering warmth of late summer. As the season progresses, the gradual descent toward winter becomes evident, with October and November bringing even lesser daylight, down to 10 and 9 hours. This rhythm of daylight captures the essence of nature's cyclical beauty, inviting reflections on the changing seasons.
As September rolls into Sennen, the average wind speed settles at a gentle 5.8 m/s (13 mph), marking a noticeable shift from the breezier summer months. After a peak in January at 8.6 m/s (19 mph), the winds gradually softened throughout the summer, with July and August reflecting some of the calmest conditions of the year. This trend continues into September, where the air is lighter, inviting a serene coastal atmosphere ideal for leisurely seaside strolls. However, as autumn approaches, the wind speed is set to pick up again in October, hinting at the dynamic changes in weather that characterize this vibrant coastal locale.
The weather in Sennen 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 Sennen and find detailed weather information for every month.
September typically showcases a milder climate with temperatures reaching an average of 16°C (61°F), while January is cooler, averaging just 9°C (49°F). Precipitation is significant in both months, with September receiving about 73 mm (2.9 in) over 13 days, and January experiencing slightly more with 87 mm (3.4 in) over 15 days. Humidity levels remain relatively high in both months, but September is slightly more humid at 84% compared to January's 81%. For a detailed look at January weather in Sennen, you can check out Sennen weather in January.
September and February present distinct differences in weather patterns. In September, temperatures range from a mild minimum of 11°C (53°F) to a comfortable maximum of 20°C (69°F), with an average of 16°C (61°F). The month experiences an average precipitation of 73 mm (2.9 in) over about 13 rainy days, accompanied by relatively high humidity at 84%. In contrast, February is considerably colder, with temperatures ranging from a low of 1°C (34°F) to a high of 13°C (55°F), with an average of just 9°C (49°F). This month sees a higher total precipitation of 99 mm (3.9 in) across 17 days, while humidity remains slightly lower at 83%. For more information, you can check Sennen weather in February.
September and March present distinctly different weather experiences. In September, temperatures range from a minimum of 11°C (53°F) to a maximum of 20°C (69°F), with an average of 16°C (61°F). The month sees about 73 mm (2.9 in) of rainfall spread over 13 days, accompanied by high humidity at 84%. In contrast, March features cooler conditions, with temperatures dipping as low as 0°C (32°F) and averaging just 9°C (49°F), reaching a maximum of 13°C (55°F). This month also experiences a slightly higher total precipitation of 90 mm (3.6 in) over 16 days, with humidity levels at a similar 82%. For more details on the weather specifics, you can visit Sennen weather in March.
In comparing the weather of September and April, September tends to be warmer and slightly more humid. With average temperatures ranging from a minimum of 11°C (53°F) to a maximum of 20°C (69°F), it offers a gentler, milder climate, whereas April features cooler temperatures, ranging from a minimum of 5°C (41°F) to a maximum of 14°C (57°F). Additionally, September experiences more rainfall, with 73 mm (2.9 in) over 13 days compared to April's 44 mm (1.7 in) across 8 days. Despite the slight difference in humidity, both months provide a unique glimpse into the transition of seasons. For more detailed insights on April weather, visit Sennen weather in April.
When comparing the weather in September and May, September tends to be slightly warmer, with average temperatures reaching 16°C (61°F), compared to May's cooler average of 12°C (54°F). The maximum temperature in September can go up to 20°C (69°F), while May peaks at 16°C (61°F). September also experiences more rainfall, with 73 mm (2.9 in) spread over 13 days, compared to May's 64 mm (2.5 in) over 10 days. Humidity levels are quite similar, with September at 84% and May slightly higher at 85%. For more details, you can check Sennen weather in May.
When comparing the weather in September to June, we see that September tends to be slightly warmer, with average temperatures ranging from a minimum of 11°C (53°F) to a maximum of 20°C (69°F), while June has a similar minimum temperature of 11°C (52°F) but an average maximum of only 19°C (67°F). Both months experience relatively high humidity levels, with September at 84% and June at 85%. Precipitation is comparable as well, with September receiving 73 mm (2.9 in) over 13 days and June slightly less at 69 mm (2.7 in) across 12 days. For more specific details on June weather conditions, check out Sennen weather in June.
In comparing the weather of September and July, September tends to be slightly cooler, with average temperatures ranging from a minimum of 11°C (53°F) to a maximum of 20°C (69°F), while July sees slightly warmer temperatures, with a minimum of 13°C (56°F) and a maximum of 21°C (71°F). Both months experience a similar level of precipitation, with September recording 73 mm (2.9 in) over 13 days compared to July's 66 mm (2.6 in) over 10 days. Humidity levels remain quite high in both months, with September at 84% and July at 85%. For more details on the weather specifics in July, you can visit Sennen weather in July.
September weather shows a slight dip in minimum temperatures compared to August, with lows of 11°C (53°F) versus August's 14°C (57°F). Both months share similar average and maximum temperatures, hovering around 16°C (61°F) and 20°C (68°F) respectively. However, September experiences more precipitation, accumulating 73 mm (2.9 in) over 13 days, compared to August's 58 mm (2.3 in) over 10 days, resulting in a trend toward wetter conditions as summer transitions to autumn. The humidity remains fairly consistent, with September at 84% and August at 85%. For more details, check out Sennen weather in August.
September and October present notable shifts in weather patterns. In September, temperatures range from a minimum of 11°C (53°F) to a maximum of 20°C (69°F), with an average of 16°C (61°F). Precipitation in September amounts to 73 mm (2.9 in) over 13 days, accompanied by a relatively high humidity of 84%. In contrast, October sees a slight drop in temperatures, with a minimum of 7°C (44°F) and a maximum of 19°C (66°F), averaging 14°C (57°F). The month is wetter, totaling 139 mm (5.5 in) of rainfall over 16 days, while humidity remains consistent at 84%. For a closer look at October weather in Sennen, you can visit Sennen weather in October.
September generally offers milder weather compared to November, with average temperatures ranging from a minimum of 11°C (53°F) to a maximum of 20°C (69°F). In contrast, November experiences cooler temperatures, with averages dropping to a minimum of 6°C (44°F) and a maximum of 15°C (60°F). Precipitation is also higher in November, totaling 125 mm (4.9 in) over 20 days, compared to September's 73 mm (2.9 in) over 13 days. Humidity levels remain relatively similar, with September at 84% and November slightly lower at 82%. For more specific details about the weather conditions during this month, you can check Sennen weather in November.
In September, the weather is milder with an average temperature of 16°C (61°F), allowing for comfortable days. The month sees about 73 mm (2.9 in) of rainfall spread over 13 days, contributing to a relatively high humidity level of 84%. In contrast, December takes a cooler turn, with temperatures dropping to an average of 10°C (51°F) and a maximum of 14°C (58°F). The precipitation also increases significantly to 150 mm (5.9 in) over 22 days, resulting in a slightly lower humidity of 81%. For a more detailed look at weather conditions during this month, you can visit Sennen weather in December.
September in Sennen marks a delightful transition, as warm summer days gradually give way to cooler autumn breezes. With average temperatures hovering around 16°C, this month is a pleasant respite, offering a comfortable climate that invites outdoor exploration. While the humidity remains high at 84%, the occasional rainfall—spreading over about half the month—adds a refreshing touch, nurturing the vibrant landscape. In comparison to the hotter summer months, September offers a more temperate experience, making it an ideal time for those looking to enjoy the beauty of the Cornish coast. For more insights on weather patterns in Sennen, check out Sennen Climate.