Last updated: March 17, 2025
In September, Pwllheli, United Kingdom, experiences a delightful blend of warm days and cool evenings. With a maximum temperature reaching up to 24°C (76°F) and an average of 15°C (59°F), the month presents a comfortable climate ideal for outdoor activities. However, visitors should be prepared for rain, as precipitation amounts average 162 mm (6.4 in) over 18 days, alongside high humidity levels of 85%. This combination of mild temperatures and frequent showers creates a uniquely refreshing atmosphere, perfect for exploring the stunning coastal landscape.
In September, Pwllheli begins to transition from the warm embrace of summer to the cooler days of autumn. With temperatures ranging from a minimum of 9°C (49°F) to a maximum of 24°C (76°F), the month offers a pleasant average temperature of 15°C (59°F), providing a comfortable feel for outdoor activities. This gradual cool-down is marked by a steady decrease in nighttime temperatures compared to the summer months, yet it still retains the warmth that invites visitors to enjoy the scenic beauty of Wales. As September unfolds, these mild and pleasant conditions create an inviting atmosphere, perfect for savoring the last tastes of summer before the autumn chill sets in.
In September, Pwllheli experiences significant precipitation, recording 162 mm (or 6.4 inches) over the month, which makes it one of the wetter periods of the year. Rainfall is frequent, with 18 rainy days, contributing to the overall moisture that characterizes this coastal town. This marked increase in precipitation follows the trend from August, which receives 166 mm of rain, showcasing a pattern of higher rainfall as summer transitions into autumn. As the month progresses, the likelihood of rain increases, setting the stage for even wetter October, typically the rainiest month with 246 mm. September's weather, characterized by fluctuating showers, bridges the drier summer months and the more intense precipitation that follows, emphasizing Pwllheli’s dynamic climate.
In September, Pwllheli, United Kingdom, experiences a notable shift in humidity, averaging 85%. This reflects a slight increase from the summer months, where humidity hovered around 78-79% in July and August. As autumn approaches, the trend shows a gradual rise, signaling a return to the higher humidity levels typical of the fall season. Notably, this month serves as a precursor to the significantly more humid October and November, where averages soar to 90% and 91%, respectively. Overall, September acts as a bridge between the drier summer months and the wetter, more humid autumn, inviting a refreshing change in the coastal atmosphere.
As summer transitions into autumn, September in Pwllheli, United Kingdom brings a moderate UV Index of 5, indicating a lower risk of harm from unprotected sun exposure. This month marks a slight dip from the blistering highs of July and August, where the UV Index peaked at 8, signaling very high exposure levels. With a recommended burn time of 30 minutes, it's essential to enjoy the valuable sunlight while taking necessary precautions, such as wearing sunscreen and protective clothing. As the season changes, these UV trends highlight the importance of staying informed about sun safety. For more details, check out the Pwllheli UV Index.
UV Risk Categories
September in Pwllheli, United Kingdom, offers a delightful transition into autumn, basking in an average of 315 hours of sunshine. Following the sun-soaked summer months, particularly July with its peak of 421 hours, September still holds onto a generous supply of sunlight, outshining the lesser hours of October, which sees a decline to 238 hours. This month benefits from a blend of warmth and crispness, making it an ideal time for outdoor activities as daylight gradually wanes. As the year progresses, the trend clearly indicates a progression from longer summer days to the more subdued light of winter, yet September stands out as a lovely reminder of summer's lingering embrace.
September in Pwllheli, United Kingdom, typically sees a 24% chance of sunny weather, marking it as one of the less favorable months for sun-seekers. This likelihood is a slight dip from the peak of 48% in April, highlighting a trend where sunnier days generally play out in the spring and early summer months. As we transition from August's 28% chance of sunshine, the onset of autumn brings cooler temperatures and an increased likelihood of cloudy days. Overall, while September might not promise the best sun-soaked experiences, it offers a gentle farewell to summer as the region prepares for the cozy embrace of fall.
As summer transitions into autumn, September in Pwllheli unveils a noticeable shift in daylight, offering approximately 12 hours of sunlight each day. This reduction follows the peak summer months of June and July, where daylight reached its zenith at 16 hours, casting long, bright evenings perfect for seaside strolls. As the days grow shorter, September retains a comfortable amount of daylight, making it an ideal time for outdoor activities before the bright golden hues begin to fade into October's 10 hours. The gradual decline from the vibrant summer light highlights the region's seasonal rhythm, inviting residents and visitors alike to savor these fleeting moments of daylight amidst the stunning coastal scenery.
As summer fades and autumn approaches, September winds in Pwllheli bring a gentle calm, with an average wind speed of 4.6 m/s (10 mph). This marks a noticeable decline from the breezier months of July and August, where gusts reached 4.0 m/s (9 mph) and 5.5 m/s (12 mph), respectively. The trend highlights a transitional phase as the region prepares for the upcoming months, where wind speeds tend to increase again. Following September, October introduces a brisk 8.2 m/s (18 mph), setting the stage for the more blustery conditions that characterize the fall and winter seasons. Overall, September offers a serene reprieve, inviting locals and visitors alike to enjoy the waning warmth before the winds pick up once more.
The weather in Pwllheli 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 Pwllheli and find detailed weather information for every month.
In September, temperatures range from a minimum of 9°C (49°F) to a pleasant maximum of 24°C (76°F), with an average around 15°C (59°F). This month sees considerable rainfall, with 162 mm (6.4 in) of precipitation spread over 18 days, and humidity levels at a high 85%. In contrast, January offers a colder climate, with temperatures dipping to a minimum of 1°C (35°F) and peaking at only 13°C (56°F), giving an average temperature of 7°C (45°F). The precipitation in January is slightly lower at 137 mm (5.4 in), occurring over 16 days, while humidity remains high at 89%. For more detailed insights into January weather, you can visit Pwllheli weather in January.
September and February present contrasting weather conditions. In September, temperatures range from a minimum of 9°C (49°F) to a maximum of 24°C (76°F), with an average of 15°C (59°F). This month experiences substantial precipitation, totaling 162 mm (6.4 in) over 18 days, while maintaining a humidity level of 85%. In contrast, February feels much colder, with temperatures dipping to a minimum of -1°C (31°F) and averaging 7°C (45°F), peaking at a maximum of 13°C (56°F). It also has a slightly higher precipitation level of 172 mm (6.8 in) spread over 19 days, accompanied by an increased humidity of 88%. For more specific insights on February weather, you can refer to Pwllheli weather in February.
September and March exhibit contrasting weather patterns. In September, temperatures range from a minimum of 9°C (49°F) to an average of 15°C (59°F), peaking at a comfortable 24°C (76°F). This month sees significant precipitation, with about 162 mm (6.4 in) spread across 18 days and humidity consistently high at 85%. Conversely, March experiences colder temperatures, with a minimum of -3°C (26°F), an average of 7°C (45°F), and a maximum of 14°C (58°F). Despite a similar amount of rainfall at 160 mm (6.3 in), it occurs over an additional day, making the month slightly wetter with a humidity level of 86%. For a more detailed look at the weather in March, check out Pwllheli weather in March.
When comparing the weather in September to April, it's clear that September is significantly warmer, with average temperatures ranging from a minimum of 9°C (49°F) to a maximum of 24°C (76°F), while April has cooler temperatures that range from 3°C (38°F) to 16°C (62°F). September also experiences much higher precipitation levels, with 162 mm (6.4 in) over 18 days, compared to April's 59 mm (2.3 in) spread over just 10 days. Despite both months having similar humidity levels (85% in September and 84% in April), the overall climate in September feels much more temperate and humid, making it a contrast to the chillier and drier conditions of April. For a closer look at April's weather, you can check Pwllheli weather in April.
September and May exhibit distinct weather patterns, with September generally being warmer and more humid. In September, temperatures range from a minimum of 9°C (49°F) to a maximum of 24°C (76°F), while May sees cooler temperatures, with a range of 4°C (40°F) to 19°C (66°F). Additionally, September experiences significantly higher precipitation at 162 mm (6.4 in) over 18 days compared to May’s 83 mm (3.3 in) over 12 days. Humidity levels are also higher in September at 85%, compared to 79% in May, reflecting the transitional nature of early autumn as opposed to late spring. For detailed information, you can check Pwllheli weather in May.
In comparing the weather in September and June, both months exhibit similar temperature ranges, with September having an average of 15°C (59°F) and June at 14°C (57°F). However, September tends to be slightly warmer overall, boasting higher maximum temperatures of 24°C (76°F) for both months. September also experiences more rainfall, with 162 mm (6.4 in) over 18 days, compared to June's 109 mm (4.3 in) across 15 days. This increased precipitation in September, coupled with a higher humidity level of 85%, makes it feel a bit more damp than June, which has an 81% humidity level. For a more detailed look at June weather, you can visit Pwllheli weather in June.
When comparing the weather in September and July, there are notable differences in temperature and precipitation. September experiences slightly cooler temperatures, with a minimum of 9°C (49°F) and an average of 15°C (59°F), while July boasts a minimum of 12°C (53°F) and an average of 16°C (60°F). Although July's maximum temperature peaks at 25°C (77°F), September can reach up to 24°C (76°F). Precipitation is considerably higher in September, with 162 mm (6.4 in) over 18 days, compared to July's 108 mm (4.3 in) over just 13 days. Additionally, humidity levels are higher in September at 85%, compared to 78% in July. For more detailed insights into July's weather, you can check Pwllheli weather in July.
In comparing the weather between August and September, we see notable differences in temperature and precipitation patterns. September typically experiences a wider temperature range, with minimums dropping to 9°C and maximums reaching 24°C, compared to August's milder minimum of 12°C and maximum of 21°C. Despite similar average temperatures, September’s increased rainfall of 162 mm over 18 days, compared to August’s 166 mm over 22 days, contributes to higher humidity at 85% versus August’s 79%. For a more comprehensive look at weather conditions in August, you can visit Pwllheli weather in August.
September and October present notable shifts in weather patterns. September typically experiences a milder range of temperatures, with minimums around 9°C (49°F) and maximums reaching 24°C (76°F), while October cools down with minimums of 4°C (39°F) and maximums of only 19°C (66°F). Additionally, October brings more rainfall, with an increase in precipitation to 246 mm (9.7 in) over 23 days compared to September's 162 mm (6.4 in) over 18 days. Humidity also rises slightly, reaching 90% in October compared to 85% in September. For more detailed information, you can visit Pwllheli weather in October.
September and November present a notable contrast in weather conditions. In September, temperatures range from a minimum of 9°C (49°F) to a maximum of 24°C (76°F), with an average of 15°C (59°F). The month experiences a considerable amount of rainfall, totaling 162 mm (6.4 in) over 18 days, and humidity levels are relatively high at 85%. In contrast, November sees a drop in temperatures, with a minimum of 4°C (39°F) and a maximum of 15°C (59°F), averaging around 10°C (50°F). The precipitation increases to 215 mm (8.5 in) over 22 days, accompanied by even higher humidity at 91%. For a closer look at November conditions, you can check Pwllheli weather in November.
September and December present strikingly different weather conditions. In September, temperatures are more moderate, with averages around 15°C (59°F) and highs reaching up to 24°C (76°F), making it feel much warmer. However, this month also features significant rainfall, totaling 162 mm (6.4 in) over 18 days, along with high humidity at 85%. In contrast, December brings much colder temperatures, with an average of 8°C (47°F) and a maximum of just 12°C (54°F). Rainfall increases in this winter month, amounting to 238 mm (9.4 in) across 25 days, and humidity rises slightly to 89%. For more detailed information on December weather, you can visit Pwllheli weather in December.
As September rolls in, Pwllheli experiences a notable shift in weather compared to the balmy summer months. Average temperatures dip, creating a comfortable ambience, while the region sees an increase in moisture, resulting in frequent rain showers across 18 days of the month. This heightened humidity, often reaching around 85%, adds to the coolness of the air, making for a fresh yet occasionally drizzly experience. While the days are still warm, the chances of encountering more variable and unpredictable weather patterns remind us that autumn is just around the corner. For a deeper dive into how this month fits into the overall climate of Pwllheli, check out Pwllheli Climate.