Last updated: March 17, 2025
Experience the captivating September weather in Harlech, United Kingdom, where temperatures range from a delightful maximum of 27°C (82°F) to a cooler minimum of 2°C (36°F), presenting an average of 13°C (56°F). This month, the landscape is nourished by 130 mm (5.1 in) of rainfall spread across 16 days, contributing to the lush greenery characteristic of this region. With humidity levels soaring at 85%, visitors can expect a mix of refreshing breezes and occasional showers, making September an enchanting time to explore the historic charm of Harlech.
September in Harlech marks a delightful transition as summer gently gives way to autumn. With minimum temperatures hovering around 2°C (36°F) and averaging a comfortable 13°C (56°F), the month still boasts pleasant highs reaching up to 27°C (82°F). This gradual cooling trend is notable, as it follows the warmer months of July and August, where temperatures peaked at 29°C (84°F) and 27°C (80°F), respectively. As the days begin to shorten, the crispness in the air becomes more pronounced, signaling the approach of cooler weather, yet the remnants of summer linger, offering the perfect backdrop for outdoor activities and explorations in this stunning corner of Wales.
September in Harlech, United Kingdom, showcases a shift towards the wetter months, with 130 mm (5.1 in) of precipitation recorded over 16 days. This is a notable increase from the preceding drier summer months, where rainfall was moderate but less frequent. With September's rain, the landscape transitions into a vibrant tapestry of autumn hues. Although the amount of rainfall is less than in October—typically the wettest month at 161 mm (6.3 in)—September's totals still indicate a significant uptick from the drier spring months, culminating in increased moisture that supports local flora and prepares the region for the chillier, wetter days ahead. As Harlech steps deeper into fall, the consistent precipitation sets the stage for the lush, green surroundings that characterize the upcoming months.
As summer fades into autumn, September in Harlech witnesses a shift in humidity levels, with an average of 85%. This marks a slight increase from the drier months of July and August, which had humidity levels of 78% and 79% respectively. As the leaves begin to turn, the air becomes noticeably more humid, paving the way for the more moisture-laden months ahead. October and November follow suit, bringing even higher humidity levels of 90% and 91%. Overall, the trend highlights a gradual rise in humidity as the year progresses towards winter, with January and December remaining among the most humid months at 89%.
As September rolls into Harlech, the UV Index reflects a notable transition, settling at a moderate 5. This marks a slight decline from the peak summer months, where levels soared to 8 in both June and July, prompting caution for sun exposure. With a recommended burn time of 30 minutes, it’s a perfect reminder to stay protected during outdoor activities while enjoying the milder autumn sun. This gradual shift continues into October, with the index dipping to 4, but still retains a similar burn time. Keep an eye on the weather and sun levels this month to enjoy your time outdoors safely. For more detailed information, visit Harlech UV Index.
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As September unfolds in Harlech, **sunshine bathes the landscape with a generous 313 hours of sunlight, providing a delightful send-off to summer. This month, while still abundant in bright days, marks a gradual decline from the peak of 420 hours in July, signaling the shift toward autumn. The warm glow of September sun not only nurtures the lingering blooms but also invites locals and visitors alike to revel in the last moments of outdoor leisure before the days shorten further. With sunlight steadily tapering after the lively summer months, September becomes a vibrant transition, blending warm hues with the crispness of approaching fall.
As summer wanes, September in Harlech, United Kingdom, displays a modest 21% chance of sunny weather, highlighting a slight decrease from the previous month’s 23%. This trend reflects a common pattern as the days become shorter and temperatures begin to cool. Interestingly, April boasts the highest likelihood of sunshine at 47%, setting it apart from the later months where chances tend to fluctuate but remain lower, particularly leading into the autumn months. Overall, while September offers some sunny moments, it's clear that the brilliance of summer gradually fades, paving the way for the cloudier days ahead.
As September unfolds in Harlech, the days begin to shorten, bringing 12 hours of daylight—a delightful balance after the sun-drenched summer months, where daylight peaked at an impressive 16 hours in June and July. This gradual decline in daylight duration, following a steady ascent from just 8 hours in January, signals the shift toward autumn as the long, sunlit evenings of May and June give way to the crisp, cool air of fall. Although September offers fewer daylight hours than its summer predecessors, it still retains a warm glow, making it an ideal time for outdoor adventures and enjoying the stunning coastal scenery before the days continue to wane into the darker months ahead.
As September sweeps into Harlech, the winds begin to whisper of change, with an average speed of 2.9 m/s (6 mph). This marks a subtle dip compared to the summer months, where July's gentle breezes at 2.5 m/s (5 mph) brought a tranquil calm, and August’s increase to 3.4 m/s (8 mph) hinted at the transition to autumn. Interestingly, September's winds remain softer than the blustery gusts of October, which typically pick up to 4.6 m/s (10 mph) as the season deepens. Overall, the month stands as a gentle interlude, bridging the calm warmth of summer with the invigorating breezes that herald the fall, showcasing nature's rhythm in this coastal haven.
The weather in Harlech 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 Harlech and find detailed weather information for every month.
September and January exhibit significantly different weather patterns. 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) and relatively high humidity at 85%. The month also sees considerable precipitation, with about 130 mm (5.1 in) over 16 days. In contrast, January experiences much colder conditions, with temperatures ranging from -3°C (26°F) to a maximum of 13°C (56°F) and an average of 5°C (42°F). Precipitation decreases slightly to 105 mm (4.2 in) over 14 days, and humidity rises to 89%. For more details on January weather, you can visit Harlech weather in January.
When comparing the weather in September and February, notable differences emerge. September offers a wider temperature range, with minimums of 2°C (36°F) and maximums reaching 27°C (82°F), creating a pleasant average of 13°C (56°F). In contrast, February is generally colder, featuring minimums of -5°C (24°F) and maximums of 18°C (65°F), resulting in a cooler average of 6°C (43°F). Rainfall is significant in both months, with September receiving 130 mm (5.1 in) over 16 days and February slightly wetter with 145 mm (5.7 in) over 17 days. While humidity levels are relatively high in both months, February's 88% slightly surpasses September's 85%, creating a chilly atmosphere. For further details, you can refer to Harlech weather in February.
Comparing the weather in September and March reveals distinct seasonal characteristics. In September, temperatures range from a minimum of 2°C (36°F) to a maximum of 27°C (82°F), averaging 13°C (56°F), while March sees cooler conditions with a low of -6°C (21°F) and a high of up to 18°C (65°F), averaging just 7°C (44°F). Additionally, both months experience significant precipitation, with September receiving about 130 mm (5.1 in) over 16 days, compared to March's slightly higher 138 mm (5.5 in) over 18 days. Humidity levels are similar, hovering around 85% in September and slightly higher at 86% in March. For more detailed information, check out Harlech weather in March.
When comparing the weather in September and April, notable differences emerge. September boasts a milder average temperature of 13°C (56°F) with highs reaching up to 27°C (82°F), whereas April's temperatures are cooler, averaging 9°C (48°F) with a maximum of 22°C (72°F). In terms of precipitation, September experiences significantly more rain, totaling 130 mm (5.1 in) over 16 days, while April has a much lighter rainfall of 58 mm (2.3 in) spread across 12 days. Humidity levels are quite similar in both months, with September at 85% and April slightly lower at 84%. For a closer look at April weather specifics, you can refer to Harlech weather in April.
When comparing the weather in September and May, several notable differences emerge. September boasts a wider temperature range, with minimums around 2°C (36°F) and maximums reaching 27°C (82°F), while May has a slightly cooler minimum of 0°C (32°F) but similar maximums of 27°C (80°F). Precipitation levels are also higher in September, with 130 mm (5.1 in) accumulating over 16 days, compared to May's 85 mm (3.3 in) across 13 days. Additionally, September tends to be more humid at 85%, whereas May's humidity is slightly lower at 79%. For more detailed insights into May's weather specifically, you can check Harlech weather in May.
When comparing the weather in September and June, we observe some notable differences. September experiences a broader temperature range with minimums dropping to 2°C (36°F) and maximums reaching 27°C (82°F), while June's temperatures are slightly warmer, ranging from a minimum of 5°C (42°F) to a maximum of 28°C (83°F). In terms of precipitation, September sees a higher total of 130 mm (5.1 in) over 16 days compared to June's 96 mm (3.8 in) over the same number of days, indicating that September tends to be wetter. Additionally, September has a slightly higher humidity level at 85%, compared to June's 81%. For more detailed insights, you can check Harlech weather in June.
When comparing the weather of September and July, we observe notable differences in temperature and precipitation. September boasts a broader temperature range, with minimums dropping to 2°C (36°F) and maximums reaching up to 27°C (82°F), while July maintains slightly warmer conditions, with minimums of 6°C (44°F) and maximums of 29°C (84°F). Additionally, September tends to be wetter, receiving 130 mm (5.1 in) of precipitation over 16 days, compared to July's 91 mm (3.6 in) over 14 days. Humidity levels are also higher in September at 85%, compared to July's 78%. For more detailed information on July conditions, you can check Harlech weather in July.
In comparing the weather between August and September, we can see notable differences in temperature and precipitation. September tends to be cooler, with a minimum temperature of 2°C (36°F), compared to August's warmer minimum of 7°C (45°F). The average temperatures are also slightly lower in September at 13°C (56°F) compared to 15°C (60°F) in August. Interestingly, both months share a maximum temperature of 27°C (82°F) in September and 27°C (80°F) in August, indicating there can still be quite warm days in both months.
However, September experiences more rain, with a total precipitation of 130 mm (5.1 in) over 16 days, while August has higher precipitation of 144 mm (5.7 in) across 20 days. The humidity is also higher in September at 85%, compared to August's 79%. For a detailed look at the weather conditions, you can check Harlech weather in August.
September and October present a notable transition in weather patterns. In September, temperatures range from a mild minimum of 2°C (36°F) to a maximum of 27°C (82°F), with an average of 13°C (56°F). This month experiences 130 mm (5.1 in) of precipitation over 16 days, accompanied by a humidity level of 85%. In contrast, October sees cooler temperatures, with lows dipping to -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, and humidity rises slightly to 90%. For more specifics on October weather, you can check out Harlech weather in October.
September and November exhibit notable differences in weather patterns. In September, temperatures range from a mild minimum of 2°C (36°F) to a warm maximum of 27°C (82°F), with an average of 13°C (56°F). The month experiences significant precipitation, totaling 130 mm (5.1 in) over approximately 16 rainy days, and the humidity sits at a comfortable 85%.
In contrast, November sees cooler temperatures, with a minimum of -1°C (30°F) and a maximum of 15°C (59°F), resulting in an average temperature of 8°C (47°F). This month is slightly wetter, receiving 138 mm (5.4 in) of rainfall over 19 days, and experiences increased humidity levels at 91%. To learn more about specific weather patterns, you can check Harlech weather in November.
In September, the weather 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). This month sees about 130 mm (5.1 in) of precipitation over 16 days, with humidity levels around 85%. In contrast, December brings much colder conditions, with temperatures dipping as low as -3°C (26°F) and peaking at 13°C (55°F), averaging only 6°C (44°F). Additionally, December experiences increased precipitation at 170 mm (6.7 in) across 20 days, accompanied by slightly higher humidity at 89%. For more specific insights into December weather, check this link: Harlech weather in December.
As September unfolds in Harlech, the weather paints a vibrant transition from summer's warmth to autumn's crispiness. Visitors can experience a pleasant mix of temperatures, with daytime highs inviting the lingering sun, while cooler evenings remind us that fall is on the horizon. This month is characterized by a noticeable increase in precipitation, with rainy days more frequent than in the preceding summer months, contributing to the lush landscapes typical of the region. Alongside the elevated humidity, September offers a unique blend of both mild and brisk days, making it a captivating time for those exploring the beauty of Harlech. For more insights into what to expect throughout the year, check out Harlech Climate.