Last updated: March 17, 2025
September in Porthcawl, United Kingdom offers a delightful mix of mild temperatures and refreshing sea breezes. With a maximum temperature reaching 26°C (80°F), the days can feel pleasantly warm, while the average hovers around 15°C (59°F), perfect for coastal strolls. Evenings cool down to a minimum of 5°C (42°F), providing a comfortable respite. However, be prepared for some rain, as the area experiences around 103 mm (4.1 in) of precipitation over 13 days, contributing to a humidity level of 79% that adds to the coastal charm. Embrace the unique weather patterns that make September a dynamic month for visitors and locals alike!
In September, Porthcawl experiences a delightful transition into early autumn, characterized by moderately warm temperatures. With a minimum of 5°C (42°F) and a pleasant average of 15°C (59°F), the days still feel summery, peaking at a maximum of 26°C (80°F). This month marks a gradual cooling from the sweltering summer months of July and August, yet it retains enough warmth for outdoor activities and seaside strolls. As the coastline bathes in soft sunlight, September offers a perfect blend of warmth and crispness, making it an ideal time for both locals and visitors to relish the lingering summer vibe before autumn settles in.
September in Porthcawl sees an average precipitation of 103 mm (4.1 in) over approximately 13 days, marking it as a month of moderate rainfall. This level of precipitation aligns closely with August, which recorded 111 mm (4.4 in), suggesting a continuation of the wet conditions typical of the late summer. Interestingly, as autumn approaches, September's rainfall is significantly less than the anticipated surge in October, where precipitation jumps to 155 mm (6.1 in). This gradual increase in rainfall from the late summer months into the autumn showcases the transition to a wetter season, setting the stage for the more intense downpours that follow. Overall, September serves as a bridge between the late summer and the more rain-soaked months ahead.
In September, Porthcawl's humidity settles at a comfortable 79%, marking a slight increase from the warmer summer months, where July and August recorded 70% and 73% respectively. This gradual rise hints at the transition into autumn, as humidity levels begin to climb, paving the way for the wetter months ahead. The pattern of decreasing humidity from January to July is followed by a gentle uptick through August and September, before the winter months arrive with heightened humidity, peaking at 90% in November. As the seasons change, Porthcawl's coastal climate continues to showcase its unique, fluid nature, offering residents and visitors a refreshing yet varied atmosphere.
As September arrives in Porthcawl, the UV Index stands at 6, placing it in the high exposure category with a burn time of 25 minutes. While this is a slight decrease from the peak summer months of July and August, when UV levels hit a maximum of 8, it still signifies a need for sun protection, especially during midday hours. This month marks a transition, as the warmer days recede toward autumn's cooler embrace, yet the sun can still deliver significant UV intensity. With earlier months featuring lower indices, September is a reminder to stay vigilant about sun safety as we savor the last bits of summer. For more detailed insights, you can check the Porthcawl UV Index.
UV Risk Categories
As summer gracefully transitions into autumn, September in Porthcawl boasts a generous 296 hours of sunshine, providing a brilliant close to the warm months. This delightful sunshine is a noticeable decline from the radiant peak of July, which enjoys an impressive 410 hours, yet it remains significantly brighter than the gloomier winter months like November and December, where sunlight dips to just 128 and 104 hours respectively. After the vibrant blooms of spring and the sun-drenched days of summer, September offers a serene balance, inviting locals and visitors alike to bask in its golden hues before the days grow shorter and cooler. With each passing month, the weather shifts, but September still shines as a beloved bridge between the vitality of summer and the calm of autumn.
In Porthcawl, September brings a 28% chance of sunny weather, a slight dip from the summer months. This statistic places it among the lower probabilities of sunshine throughout the year, notably lower than the spring peak in April, which boasts a 55% chance. While September still holds on to some warmth, making it more enjoyable than the chillier autumn months, the likelihood of clear skies diminishes as the year progresses. Overall, as summer fades, the chance of sunshine in Porthcawl begins to fall, hinting at the crisp, cloudier days ahead in the coming months.
As the summer sun begins to fade in Porthcawl, September witnesses a gentle decline in daylight, with an average of 12 hours illuminating the skies. This transition from the long, sunlit days of July and August, which boasted a maximum of 16 and 14 hours respectively, marks the onset of autumn's embrace. Following the vibrant spring and summer months, where daylight peaked at 16 hours in June, the shorter days of September signal a shift in the seasonal rhythm, paving the way for the cozy, darker months ahead. With October bringing even less light, at just 10 hours, the change is a reminder of nature's cyclical dance and the gradual approach of winter’s tranquility.
In September, Porthcawl experiences a gentle shift in wind patterns, with an average speed of 4.1 m/s (9 mph). This marks a slight decline from the breeziness of the summer months, where winds hovered around 4.6 m/s in August, creating a more tranquil atmosphere as autumn begins to set in. Interestingly, September serves as a transitional period, nestled between the calm of summer and the brisk winds that often characterize October, which sees a notable increase back to 5.5 m/s (12 mph). Overall, the trend highlights how the coastal winds gradually mellow out as the season changes, inviting locals and visitors alike to enjoy the serene beauty of Porthcawl's early autumn.
The weather in Porthcawl 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 Porthcawl 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 (42°F) to a maximum of 26°C (80°F), with an average of 15°C (59°F). The month also features relatively high humidity at 79% and experiences 103 mm (4.1 in) of precipitation over approximately 13 days. In contrast, January is much colder, with temperatures fluctuating between -2°C (28°F) and 13°C (57°F), and an average of just 6°C (43°F). Although January receives slightly less precipitation at 93 mm (3.6 in) over 12 days, it has a higher humidity level of 88%. For more detailed information about January weather specifically, you can visit Porthcawl weather in January.
In September, the weather tends to be milder with temperatures ranging from a minimum of 5°C (42°F) to a maximum of 26°C (80°F), and an average of 15°C (59°F). It experiences about 103 mm (4.1 inches) of precipitation over approximately 13 days, with humidity levels around 79%. In contrast, February brings a chillier climate, featuring temperatures that range from -3°C (27°F) to 15°C (58°F), with an average of 7°C (44°F). This month sees higher precipitation levels at 117 mm (4.6 inches) over 15 days and increased humidity at 88%. For detailed information, check out Porthcawl weather in February.
When comparing the weather in September and March, we see notable differences in temperature and humidity. September enjoys milder temperatures, with averages around 15°C (59°F) and highs reaching up to 26°C (80°F). In contrast, March is cooler, with average temperatures of 7°C (45°F) and maximums of 17°C (63°F), dipping to lows of -5°C (23°F). Both months experience similar levels of precipitation at 103 mm (4.1 in), but March sees rain on 17 days compared to September's 13 days. Additionally, humidity is slightly higher in March at 86% compared to September's 79%. For those interested in more specifics about March weather, you can check out Porthcawl weather in March.
In comparing the weather between September and April, we see notable differences in temperatures, precipitation, and humidity. September enjoys a milder climate with temperatures ranging from a minimum of 5°C (42°F) to a maximum of 26°C (80°F) and an average of 15°C (59°F). In contrast, April experiences cooler temperatures, with lows dipping to -1°C (31°F) and highs reaching only 20°C (68°F), averaging at 9°C (49°F).
Precipitation is also more significant in September, with 103 mm (4.1 in) falling over 13 days, compared to April's 55 mm (2.2 in) over 9 days. Interestingly, the humidity in April is slightly higher at 84%, while September sits at 79%. These differences underscore the transition from the warmth of late summer to the crispness of early spring. For more detailed insights, check out Porthcawl weather in April.
When comparing the weather in September and May, we can see some notable differences and similarities. September typically presents warmer temperatures, with a minimum of 5°C (42°F) and a maximum of 26°C (80°F), while May has slightly cooler temperatures, ranging from 2°C (37°F) to a maximum of 24°C (75°F). The average temperature in September is also higher at 15°C (59°F) compared to May's average of 12°C (54°F). In terms of precipitation, September sees more rainfall, totaling 103 mm (4.1 in) over 13 days, while May has 78 mm (3.1 in) across 11 days. Both months share similar humidity levels, with September at 79% and May at 80%. For a closer look at May's weather conditions, you can explore Porthcawl weather in May.
When comparing the weather in September and June, both months exhibit similar average temperatures, hovering around 15°C (59°F) with maximums of 26°C (80°F). However, September tends to have slightly cooler minimum temperatures, dipping down to 5°C (42°F) compared to June's 8°C (46°F). In terms of precipitation, September receives more rain at 103 mm (4.1 in) over 13 days, while June sees lesser rainfall at 84 mm (3.3 in) across 14 days. Humidity levels are comparable, with September at 79% and June at 80%. For more detailed information on June weather, you can check Porthcawl weather in June.
In comparing the weather between September and July, we can see some notable differences. September experiences a slightly broader temperature range, with minimums dropping to 5°C (42°F) and average highs peaking at 26°C (80°F). This month is also marked by higher humidity levels at 79% and increased precipitation of 103 mm (4.1 in) over 13 days. In contrast, July offers a warmer climate, with minimum temperatures at 9°C (48°F) and a slightly higher average temperature of 17°C (63°F), while maximums reach the same 27°C (80°F) as September. July also has less rainfall at 83 mm (3.3 in) over the same number of days, accompanied by lower humidity at 70%. For a closer look at the weather specifics in July, check out Porthcawl weather in July.
In comparing the weather of September to that of August, September experiences slightly cooler temperatures overall, with a minimum of 5°C (42°F) compared to August's minimum of 9°C (48°F). The average temperature in September is 15°C (59°F), a bit lower than August's average of 16°C (62°F). Both months share a maximum temperature of 27°C (80°F). Precipitation in September totals 103 mm (4.1 in) over 13 days, which is less than August's 111 mm (4.4 in) spread over 18 days. Additionally, September exhibits higher humidity at 79%, compared to August's 73%. For more detailed weather information, you can check Porthcawl weather in August.
September and October present a notable shift in weather conditions. In September, temperatures range from a minimum of 5°C (42°F) to a comfortable maximum of 26°C (80°F), with an average of 15°C (59°F). This month experiences 103 mm (4.1 in) of precipitation over 13 days, maintaining a humidity level of 79%. In contrast, October brings cooler temperatures, with a minimum of 1°C (34°F) and a maximum of 21°C (69°F), averaging 12°C (54°F). The month is wetter, with precipitation totaling 155 mm (6.1 in) over 17 days and a rise in humidity to 89%. For a detailed overview of October's conditions, check out Porthcawl weather in October.
In September, temperatures range from a mild 5°C (42°F) at night to a pleasant 26°C (80°F) during the day, with an average of 15°C (59°F). The humidity stands at 79%, and the month experiences 103 mm (4.1 in) of precipitation over about 13 days. In contrast, November brings cooler temperatures, with minimums dropping to -1°C (31°F) and an average of 9°C (48°F). The maximum temperature reaches only 16°C (60°F), while humidity rises to 90%. November is also wetter, with precipitation of 122 mm (4.8 in) across 16 days. For more detailed information, you can check this link: Porthcawl weather in November.
In September, the weather generally offers milder conditions with temperatures ranging from a minimum of 5°C (42°F) to a maximum of 26°C (80°F), and an average around 15°C (59°F). Precipitation is moderate at 103 mm (4.1 in), occurring on about 13 days, while humidity remains at a comfortable 79%. In contrast, December brings much cooler weather, with temperatures dropping to a minimum of -1°C (30°F) and a maximum of only 13°C (55°F), averaging around 8°C (46°F). The month sees increased precipitation at 159 mm (6.3 in) over 19 days, and humidity levels rise to 89%, creating a much chillier and wetter atmosphere. For a more detailed look at the December weather patterns, you can check Porthcawl weather in December.
As September unfolds in Porthcawl, it marks a distinct transition from the warmth of summer to the cooler embrace of autumn. With a maximum temperature touching 26°C, the month can still bask in pleasantly warm days, yet it also brings a noticeable dip towards the average lows of 15°C and even cooler nights that can plunge to 5°C. The notable humidity of 79% along with 103 mm of rain spread over 13 days reflects the increasingly changeable weather, making September a month rich in variability. This shift sets the stage for the crisp air and the vibrant hues of autumn to emerge, offering a unique experience for those who visit. To explore more about Porthcawl’s seasonal nuances, check out Porthcawl Climate.