September Weather in Llantwit Major, United Kingdom

Last updated: March 17, 2025

September in Llantwit Major, United Kingdom, offers a delightful blend of weather conditions, perfect for outdoor enthusiasts and those enjoying the early autumn season. With maximum temperatures reaching 27°C (80°F), the month provides warm days, although an average of 15°C (59°F) keeps things refreshingly temperate. As the nights draw cooler, temperatures can dip to a minimum of 5°C (41°F). Rainfall is a notable feature, with 92 mm (3.6 in) spread over 12 days, contributing to the area's lush landscapes. The humidity hovers around 79%, adding a touch of softness to the air. Whether you’re exploring coastal paths or enjoying local festivities, September in Llantwit Major promises a captivating experience despite its mix of sunshine and rain.

September Temperature in Llantwit Major

In September, Llantwit Major experiences a delightful transition as summer begins to fade, with temperatures that invite an array of outdoor activities. The month starts with a minimum of 5°C (41°F), rising to an average of 15°C (59°F) and peaking at a pleasant 27°C (80°F). This blend of cool mornings and warm afternoons creates a perfect setting for enjoying the crisp air and vibrant hues of early autumn. Compared to the warmer months of July and August, September offers a more temperate climate while still retaining some remnants of summer's warmth, marking a gentle shift rather than a stark change. This balance makes the month ideal for exploring the scenic beauty of the coastline and local attractions while the weather is still favorable.

September Weather in Llantwit Major: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Llantwit Major, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec434345495459636258544845
Data source: Temperature data for Llantwit Major generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Llantwit Major

In September, Llantwit Major experiences a moderate precipitation level of 92 mm (3.6 in) over 12 days, marking a transition from the wetter summer months to the increasingly rainfall-rich autumn. This decline follows the august peak of 106 mm, subtly shifting the weather patterns as the days grow cooler. Notably, September's rainfall aligns closely with the average levels seen earlier in the year, such as January and February, which also recorded similar amounts of rainfall. The steady shift towards the wetter October, which boasts 146 mm, signals the onset of the seasonal change, while ensuring that the lush landscape of Llantwit Major remains vibrant throughout the year.

September Precipitation Trends in Llantwit Major

The chart displays monthly precipitation patterns in Llantwit Major, with values for each month alongside September's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec831111015780858610693146111144
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Llantwit Major

In Llantwit Major, September marks a notable transition in humidity levels, with an average of 79%. As summer fades, the humidity begins to decrease from the peak levels of July and August, which experience much more moisture at 70% and 73% respectively. This gentle decline signals the onset of autumn, yet the air remains relatively moist compared to the winter months. From October onwards, humidity spikes again, reaching 89% in both October and December, illustrating a cyclical pattern where the crispness of fall gives way to the dampness of winter. Overall, September serves as a bridge between the warm, humid summer and the cooler, wetter autumn, making it a time of subtle shifts in Llantwit Major's climate.

September Average Humidity in Llantwit Major

This chart illustrates the average monthly humidity levels in Llantwit Major, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%86%84%80%80%70%73%79%89%90%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Llantwit Major

As September unfolds in Llantwit Major, the UV Index remains notably high at 6, reflecting a continued prevalence of sunny days as summer wanes. With an exposure category classified as high, residents and visitors should be mindful of sun protection, as the burn time is reduced to 25 minutes for unprotected skin. This trend shows a gradual decrease from the peak summer months of July and August, where the UV Index soared to 8, but still captures the essence of lingering warmth. It’s essential to balance outdoor activities with skin safety, ensuring that the transition into autumn doesn’t catch anyone off guard. For more details on UV levels throughout the year, visit Llantwit Major UV Index.

Maximum UV Index Levels in Llantwit Major for September

The chart shows the monthly maximum UV Index (UVI) for Llantwit Major in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec124678876421
Data source: Llantwit Major September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Llantwit Major

As summer gracefully transitions into autumn, September in Llantwit Major boasts a commendable 296 hours of sunshine, a reflection of the lingering warmth left by the vibrant summer months. This figure is notably less than the 410 hours recorded in July, yet it still enjoys a generous amount of sunlight compared to the drearier days ahead in October and November. The trend reveals that while September may signal the onset of fall, it retains a sense of brightness, allowing residents and visitors alike to savor the tail end of seasonal outdoor activities amidst a backdrop of changing leaves. With sunlight gradually diminishing in the following months, September offers a fleeting opportunity to embrace the sun-kissed beauty of Llantwit Major before the winter chill sets in.

Monthly Sunshine Duration in Llantwit Major: September Highlighted

The September sunshine duration represents the total number of hours Llantwit Major experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec87h142h205h320h393h373h410h362h296h233h128h104h
Data source: Llantwit Major September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Llantwit Major During September

In Llantwit Major, September brings a moderate chance of sunshine, sitting at around 28%. While the summer months often yield higher probabilities, such as July's 41% and August's 32%, September sees a slight dip as it transitions into autumn. Interestingly, this month showcases a blend of shifting weather patterns; it retains some of the warmth and brightness typical of late summer while also preparing for the cloudier days ahead. Overall, September's sun chance is encouraging, reflecting a season that balance the lingering summer vibes against the early whispers of autumn.

Percentage of Sunny Days in September in Llantwit Major

The chart illustrates the percentage of sunny days in Llantwit Major throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Llantwit Major experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec22%23%30%54%33%27%41%32%28%21%30%20%
Data source: Llantwit Major September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Llantwit Major in September

As summer fades into autumn, September in Llantwit Major, United Kingdom, ushers in a noticeable shift in daylight hours. With 12 hours of daylight, the month retains some of the lingering brightness of late summer, but it marks the beginning of a gradual decline. After enjoying up to 16 hours in June and July, daylight starts to wane, a trend that will continue through the autumn months. This transition reflects a harmonious rhythm of changing seasons, where the daylight diminishes more significantly as the days draw closer to winter's embrace. With the evening light beginning to retreat, September serves as a gentle reminder of the cycles of nature, balancing the warmth of summer with the cool approach of autumn.

Average Daylight Hours in Llantwit Major for September

The chart illustrates the variation in daylight duration in Llantwit Major throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 23m9h 58m11h 55m13h 54m15h 39m16h 33m16h 4m14h 30m12h 35m10h 36m8h 49m7h 52m
Data source: Llantwit Major daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Llantwit Major

As September rolls into Llantwit Major, the average wind speed settles at a mild 3.8 m/s (9 mph), a gentle breeze that marks a noticeable dip from the gustier months of winter and late summer. This transitional period sees a shift in the coastal atmosphere, where the sea air brings a refreshing coolness after the warmer months. In comparison to the preceding months, September's winds reflect a calmness that invites leisurely strolls along the beach, as the town begins to prepare for the brisk embrace of autumn. The trend of decreasing wind speeds from June's peak suggests a lulling tranquillity inherent in the season, making it an ideal time to savor the serene coastal scenery before the winds pick up again in October.

Average September Wind Speed in Llantwit Major

The chart displays monthly wind speed patterns in Llantwit Major, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec5.36.05.13.94.93.63.54.43.8 m/s5.14.45.7
Data source: Llantwit Major September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Llantwit Major Compares to Other Months

The weather in Llantwit Major 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 Llantwit Major and find detailed weather information for every month.

September and January present contrasting weather patterns. In September, temperatures range from a minimum of 5°C (41°F) to a maximum of 27°C (80°F), offering a pleasant average of 15°C (59°F). The month experiences moderate precipitation of 92 mm (3.6 in) over 12 days, with a humidity level of 79%. In stark contrast, January sees colder conditions with temperatures ranging from a minimum of -3°C (28°F) to a maximum of 13°C (56°F), yielding an average of just 6°C (43°F). Although precipitation is slightly lower at 83 mm (3.3 in) over the same number of days, the humidity slightly increases to 88%. For more detailed information, check out Llantwit Major weather in January.

September and February present contrasting weather patterns, with September offering a milder climate. In September, temperatures range from a minimum of 5°C (41°F) to a maximum of 27°C (80°F), averaging around 15°C (59°F). This month typically sees 92 mm (3.6 in) of precipitation over 12 days, along with a humidity level of 79%. In contrast, February experiences colder temperatures, with a minimum of -3°C (26°F) and a maximum of 15°C (59°F), averaging about 6°C (44°F). Precipitation increases slightly to 111 mm (4.4 in) across 15 days, accompanied by higher humidity at 88%. For more detailed information on February weather, you can check this link: Llantwit Major weather in February.

September and March present contrasting weather patterns. In September, temperatures are milder, ranging from a minimum of 5°C (41°F) to a maximum of 27°C (80°F), with an average of 15°C (59°F). While it experiences significant rainfall, totaling 92 mm (3.6 in) over about 12 days, the humidity is relatively lower at 79%. In contrast, March is considerably cooler, with temperatures dipping as low as -5°C (23°F) and only reaching a maximum of 18°C (64°F), averaging around 7°C (45°F). It also has slightly more precipitation, with 101 mm (4.0 in) spread over 17 days, and a higher humidity level of 86%. For a closer look at the specifics, you can check this Llantwit Major weather in March.

When comparing weather conditions in September and April, notable differences emerge. September typically enjoys milder temperatures, with a minimum of 5°C (41°F), an average of 15°C (59°F), and a maximum of 27°C (80°F), making it much warmer than April, which sees temperatures ranging from a minimum of -1°C (30°F) to a maximum of 20°C (68°F) and an average of 9°C (49°F). Additionally, September experiences higher precipitation levels, with 92 mm (3.6 in) over 12 days, compared to April’s 56 mm (2.2 in) over 10 days. Humidity levels are also slightly higher in April at 84%, versus 79% in September. For more details, you can check Llantwit Major weather in April.

September weather typically features a wider range of temperatures compared to May, with minimums around 5°C (41°F) and maximums reaching up to 27°C (80°F), averaging at 15°C (59°F). In contrast, May sees slightly cooler conditions, with temperatures ranging from a minimum of 2°C (36°F) to a maximum of 24°C (75°F), and an average of 12°C (54°F). Both months experience similar levels of precipitation, with September receiving 92 mm (3.6 in) and May getting 80 mm (3.2 in), each with rain on about 12 days. Notably, humidity levels are comparable, with September at 79% and May at 80%, offering a moist atmosphere in both months. For further details, you can check Llantwit Major weather in May.

In both September and June, temperatures remain relatively mild, with average highs around 27°C (81°F) in each month. September sees temperatures ranging from a minimum of 5°C (41°F) to a maximum of 27°C (80°F), while June has a slightly higher minimum of 7°C (45°F) and matches the same maximum. Precipitation is quite similar, with September receiving 92 mm (3.6 in) over 12 days, compared to June’s 85 mm (3.3 in) over 13 days. Humidity levels are also comparable, with September at 79% and June slightly higher at 80%. For a detailed look at the weather in June, check out Llantwit Major weather in June.

When comparing the weather in September and July, we can observe some distinct differences. September generally experiences cooler temperatures, with a minimum of 5°C (41°F) and an average of 15°C (59°F), compared to July’s milder minimum of 9°C (48°F) and average of 17°C (63°F). Interestingly, both months have a maximum temperature that peaks at 27°C (81°F). However, September is slightly wetter, with 92 mm (3.6 in) of precipitation over 12 days, while July sees 86 mm (3.4 in) with the same number of rainy days. Furthermore, September's humidity at 79% is noticeably higher than July's 70%, contributing to a more muggy feel as summer transitions into autumn. For more specific details on July weather, you can check Llantwit Major weather in July.

When comparing the weather in September to that of August, September experiences slightly cooler temperatures, with a minimum of 5°C and an average of 15°C, while August has higher minimum and average temperatures of 9°C and 16°C, respectively. The maximum temperature in September reaches 27°C, which is just a degree lower than August's peak of 28°C. Although September sees less overall precipitation at 92 mm compared to August's 106 mm, it is spread over fewer days, resulting in 12 wet days versus August's 16. Additionally, September boasts higher humidity levels at 79%, compared to August's 73%. For further details on August weather, check out Llantwit Major weather in August.

September typically offers a warmer climate with average temperatures around 15°C (59°F), peaking at 27°C (80°F). In contrast, October sees a noticeable drop, with average temperatures declining to 12°C (54°F) and maximums reaching only 21°C (70°F). While September experiences about 92 mm (3.6 in) of precipitation over 12 days, October is noticeably wetter, with 146 mm (5.7 in) of rainfall spread across 17 days. Humidity also increases from 79% in September to 89% in October, contributing to a more moisture-laden atmosphere. For more details on the October weather, check Llantwit Major weather in October.

September and November exhibit distinctly different weather patterns. In September, temperatures range from a minimum of 5°C (41°F) to a comfortable maximum of 27°C (80°F), with an average of 15°C (59°F). The month sees around 92 mm (3.6 in) of precipitation spread over 12 days, and the humidity hovers at 79%. In contrast, November brings cooler weather, with temperatures dipping to a minimum of -1°C (31°F) and averaging 9°C (48°F), peaking at only 16°C (60°F). The month experiences more precipitation at 111 mm (4.4 in) over 16 days, combined with increased humidity at 90%. This change underscores the transition from late summer warmth to the chill of early winter. For more specific information on November conditions, check out Llantwit Major weather in November.

The weather in September is generally milder, with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 27°C (80°F), and an average temperature of 15°C (59°F). In contrast, December brings colder conditions, with temperatures dipping to a minimum of -2°C (29°F) and an average of 7°C (45°F). While September experiences 92 mm (3.6 in) of precipitation over about 12 days, December sees an increase in precipitation to 144 mm (5.7 in) across 18 days, indicating a wetter month. Additionally, humidity levels are slightly higher in December at 89%, compared to 79% in September. For more detailed information about December weather, you can check Llantwit Major weather in December.

Compare Llantwit Major's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Llantwit Major

September in Llantwit Major marks a transition as summer gently yields to autumn. The month exhibits a notable balance, offering warm days with temperatures climbing up to 27°C (80°F), while evenings can be refreshingly cool. Precipitation becomes more frequent, with rain appearing on about 12 days, contributing to a humidity level around 79%, as the landscape begins to shift with the changing seasons. Compared to the warmer and drier months preceding it, September showcases a blend of lingering warmth and the first hints of fall, making it a beautiful time to experience the area's natural charm. Discover more about the weather patterns throughout the year by visiting Llantwit Major Climate.