Last updated: March 17, 2025
In Dolgellau, United Kingdom, September brings a mix of mild and variable weather, with maximum temperatures reaching 27°C (82°F), contrasting sharply with a chilly minimum of 2°C (36°F). The month averages around 13°C (56°F), inviting a range of outdoor activities. However, visitors should prepare for the region’s characteristic wetness, as 130 mm (5.1 in) of rain falls over approximately 16 days, creating a humid environment with levels around 85%. This eclectic weather profile offers a glimpse into the region's charm, making September a uniquely captivating time to experience Dolgellau’s enchanting landscapes.
In September, Dolgellau experiences a delightful transition as summer meets autumn, with temperatures reflecting this shift. The minimum temperature hovers around a cool 2°C (36°F), providing a refreshing start to the month. With an average temperature of 13°C (56°F), the days remain pleasantly warm, often reaching up to a comfortable 27°C (82°F) during the peak. This rise in temperature signifies a lingering warmth from the summer months, yet the evenings tend to cool off, hinting at the cozy autumn ahead. This pattern of gradually lowering averages from the sizzling summer peaks demonstrates Dolgellau's unique climatic charm, making September a beautiful time to explore its stunning landscapes.
September in Dolgellau brings a substantial 130 mm (5.1 in) of precipitation, making it one of the wetter months of the year. With 16 days of rainfall, the weather hints at the transition into autumn, following a wet and bustling summer highlighted by August’s impressive 144 mm (5.7 in). As the early weeks of September unfold, the rainfall volumes decrease slightly compared to the peak of winter and late autumn months, yet still maintain a robust presence. This pattern signifies a gradual shift, with October expected to see an increase in precipitation, reaching 161 mm (6.3 in). The varying degrees of rainfall across the months reflect Dolgellau's dynamic climate, where each season contributes its unique character to the landscape.
In Dolgellau, United Kingdom, September marks a transition as the summer warmth begins to wane, bringing an average humidity of 85%—a noticeable increase from the drier months of July and August, which averaged around 78-79%. This uptick signifies the onset of autumn, a trend that continues into the following months. The humidity levels not only reflect the changing seasons but also foreshadow the wetter conditions of October through December, where humidity climbs to a peak of 91% in November. Overall, September serves as a bridge from warmer, more comfortable air to the cool, moisture-rich atmosphere characteristic of the fall season, inviting both locals and visitors to breathe in the crisp, refreshing air.
In September, Dolgellau experiences a UV Index of 5, indicating a moderate level of solar exposure. This marks a transition from the peak summer months, where UV levels reach a high of 8 in July and June, to a more manageable intensity. With a burn time of around 30 minutes, residents and visitors should still exercise caution, especially during midday hours. As we move into autumn, the UV levels gradually decrease, reflected in the forthcoming months where October sees a slight dip to an index of 4. For detailed insights and tips on protecting your skin throughout the year, check out the comprehensive guide on Dolgellau UV Index.
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As summer fades, September in Dolgellau continues to bask in a generous 313 hours of sunshine, marking a graceful transition from the vibrant warmth of August's 385 hours. This month, while still bright, shows a gentle decline, echoing the shifting seasons. Following the peak of July's impressive 420 hours, the sunlight begins to wane, but September still holds its own against the cooler months that follow. With October's arrival, the sunshine drops to 239 hours, a clear indication of the approach of autumn. The trend highlights a steady journey from the sun-drenched pleasures of late spring and summer into the cozy embrace of fall, inviting residents and visitors alike to relish the last of the golden rays before winter's chill settles in.
In September, Dolgellau, United Kingdom, experiences a 21% chance of sunny weather, which is relatively modest compared to the spring months, particularly April, where sunshine peaks at 47%. This month falls after the summer season and reflects a slight downturn in daylight and warm weather, mirroring the trend of decreasing sunshine that begins to take hold in October with just 15%. While September offers a bit more sunlight than the preceding months of August and July, which sit at 23% and 36%, respectively, it’s clear that as autumn approaches, sunshine becomes less of a guarantee, prompting locals and visitors alike to embrace the remaining sunny days.
As summer transitions into autumn, September in Dolgellau marks a gentle decline in daylight hours, averaging around 12 hours of sunlight. This reduction follows the peak of 16 hours enjoyed in the height of summer, illustrating the natural ebb and flow of light throughout the year. While September offers significantly more daylight than the approaching months of October and November, where daylight dips to 10 and 8 hours respectively, it serves as a beautiful bridge to the cozy evenings of fall. The softening daylight creates a serene atmosphere, perfect for embracing the changing seasons.
As September arrives in Dolgellau, the gentle breeze signals a transition into the crispness of autumn. With an average wind speed of 2.9 m/s (6 mph), the winds begin to calm compared to the summer months, marking a notable reduction from July's low of 2.5 m/s (5 mph) and a slight dip from August's 3.4 m/s (8 mph). This pattern hints at the tranquil yet invigorating air that characterizes the early fall, creating an inviting atmosphere for outdoor activities. Looking ahead, October typically ushers in a resurgence of winds, averaging 4.6 m/s (10 mph), suggesting that September serves as a gentle prelude before the breezier days of autumn take hold.
The weather in Dolgellau 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 Dolgellau and find detailed weather information for every month.
In September, the weather in Dolgellau is generally milder, with temperatures ranging from a minimum of 2°C (36°F) to a maximum of 27°C (82°F) and an average of 13°C (56°F). The month experiences significant rainfall, totaling around 130 mm (5.1 in) over 16 days, with humidity averaging 85%. In contrast, January presents a colder climate, where temperatures drop to a minimum of -3°C (26°F) and peak at 13°C (56°F), with an average temperature of 5°C (42°F). Precipitation is slightly lower at 105 mm (4.2 in) over 14 days, while humidity increases to 89%. For more details, you can check out Dolgellau weather in January.
September and February present notably different weather patterns. In September, temperatures range from a chilly 2°C (36°F) to a warm 27°C (82°F), with an average of 13°C (56°F), while February experiences colder conditions, with temperatures dipping from -5°C (24°F) to a maximum of 18°C (65°F) and an average of 6°C (43°F). Precipitation levels are relatively high in both months, with September receiving 130 mm (5.1 in) over 16 days and February slightly wetter at 145 mm (5.7 in) across 17 days. Humidity is also higher in February at 88%, compared to 85% in September. For more detailed information on February weather conditions, you can visit Dolgellau weather in February.
September and March present contrasting weather patterns, with September showcasing a milder range of temperatures. In September, temperatures typically fluctuate from a minimum of 2°C (36°F) to a comfortable maximum of 27°C (82°F), averaging around 13°C (56°F). The month sees significant rainfall, with around 130 mm (5.1 in) spread over 16 days and a humidity of 85%. In contrast, March experiences cooler temperatures with lows dipping to -6°C (21°F) and highs reaching up to 18°C (65°F), averaging at 7°C (44°F). Precipitation is slightly higher at 138 mm (5.5 in), occurring over 18 days, and humidity remains relatively high at 86%. For those curious about specifics, you can explore Dolgellau weather in March.
When comparing the weather in September and April, notable differences emerge in both temperature and precipitation patterns. September typically enjoys a more varied temperature range, with minimums around 2°C (36°F) and maximums reaching up to 27°C (82°F), averaging 13°C (56°F). In contrast, April starts chillier with minimum temperatures as low as -3°C (28°F) and maximums peaking at 22°C (72°F), averaging just 9°C (48°F). While September experiences heavier rainfall, totaling 130 mm (5.1 inches) over 16 days, April sees significantly less precipitation at 58 mm (2.3 inches) across 12 days. Both months maintain high humidity levels, with September slightly higher at 85% compared to April's 84%. For more specifics, you can check Dolgellau weather in April.
In comparing the weather between September and May, we see some notable differences. September tends to be warmer with average temperatures reaching 13°C (56°F), peaking at a maximum of 27°C (82°F), while May has a cooler average of 11°C (53°F) and also a maximum of 27°C (80°F). Precipitation levels are higher in September, with 130 mm (5.1 in) over 16 days compared to May's 85 mm (3.3 in) over 13 days. Humidity in September is slightly higher at 85%, whereas May's humidity is at 79%, indicating that September feels a bit more muggy. For a more detailed look at specific conditions during May, you can check Dolgellau weather in May.
In comparing the weather between September and June, September experiences a wider range of temperatures, with a minimum of 2°C (36°F) and a maximum of 27°C (82°F), while June has slightly warmer averages, ranging from a minimum of 5°C (42°F) to a maximum of 28°C (83°F). Both months see about 16 days of precipitation, but September receives more rainfall overall, totaling 130 mm (5.1 in) compared to June's 96 mm (3.8 in). Humidity is slightly higher in September at 85%, as opposed to June’s 81%. For more detailed information on June weather, you can visit Dolgellau weather in June.
Comparing September and July weather, September tends to be cooler with minimum temperatures dropping to 2°C (36°F), while July's minimum is noticeably higher at 6°C (44°F). The average temperature in September is about 13°C (56°F), compared to July's warmer average of 16°C (61°F). Although both months experience humidity, September's level is slightly higher at 85% compared to July's 78%, contributing to a more damp atmosphere. Additionally, September sees more precipitation, with 130 mm (5.1 in) over 16 days, compared to July's 91 mm (3.6 in) over 14 days. For more detailed insights, you can check Dolgellau weather in July.
In comparing the weather of September to August, September tends to start cooler with minimum temperatures dropping to 2°C (36°F) compared to August's warmer 7°C (45°F). Both months share a maximum temperature of 27°C (82°F), but September has a lower average temperature of 13°C (56°F) versus August's 15°C (60°F). Additionally, September experiences slightly higher precipitation, totaling 130 mm (5.1 in) over 16 days, while August records 144 mm (5.7 in) across 20 days. Humidity levels are higher in September at 85%, compared to August's 79%. For a detailed look at August weather, you can check Dolgellau weather in August.
In September, temperatures in Dolgellau range from a chilly 2°C (36°F) at night to a warm 27°C (82°F) during the day, with an average of 13°C (56°F). The month experiences around 130 mm (5.1 in) of precipitation over 16 days, coupled with a humidity level of 85%. In contrast, October brings cooler temperatures, with a minimum of -2°C (28°F) and a maximum of 21°C (70°F), averaging 11°C (52°F). Precipitation increases to 161 mm (6.3 in) over 19 days, while humidity also rises to 90%. For more details on October weather, visit Dolgellau weather in October.
In September, temperatures range from a minimum of 2°C (36°F) to a maximum of 27°C (82°F), with an average of 13°C (56°F). The month sees about 130 mm (5.1 in) of precipitation over 16 days, accompanied by a humidity level of 85%. In contrast, November brings cooler weather with temperatures ranging from a minimum of -1°C (30°F) to a maximum of 15°C (59°F), averaging 8°C (47°F). Rainfall increases slightly to 138 mm (5.4 in) and occurs over 19 days, while humidity rises to 91%. For more details, you can check out Dolgellau weather in November.
In September, temperatures range from a cool 2°C (36°F) at night to a warm 27°C (82°F) during the day, with an average of 13°C (56°F). The month experiences 130 mm (5.1 in) of precipitation over 16 days, contributing to a humidity level of 85%. In contrast, December sees much colder conditions, with temperatures dropping to a minimum of -3°C (26°F) and peaking at 13°C (55°F), averaging just 6°C (44°F). Rainfall increases to 170 mm (6.7 in) over 20 days, resulting in slightly higher humidity at 89%. This drastic shift underscores the transition from the relatively mild early autumn to the chillier winter months. For more information, visit Dolgellau weather in December.
As summer fades into autumn, September in Dolgellau presents a unique blend of warmth and refreshment. With temperatures fluctuating more dramatically than in the peak summer months, the average cools down, inviting cozy layers while still allowing for occasional sunny days. However, expect increased rain, with over half the month seeing precipitation, leading to an invigorating humidity of 85%. This transitional period offers a refreshing contrast to the muggy summer heat and prepares the landscape for the vibrant fall colors. For more details on the weather patterns throughout the year, visit Dolgellau Climate.