Last updated: March 17, 2025
In September, Southwold presents a delightful transition into autumn, characterized by an average temperature of 16°C (61°F). Daytime highs can reach a comfortable 21°C (70°F), while evenings cool down to a brisk 10°C (51°F). However, this month is not without its share of rain, with 67 mm (2.6 in) of precipitation spread over approximately 11 days, contributing to the region's lush scenery. Expect the air to be quite humid, averaging around 84%, which adds to the coastal charm of this picturesque seaside town. Enjoy the vibrant atmosphere and refreshing coastal breezes as summer gradually gives way to fall.
As September rolls into Southwold, the warmth of summer begins to gently fade, offering a delightful transitional month. With nighttime temperatures averaging a comfortable 10°C (51°F) and daytime highs reaching up to 21°C (70°F), the weather is perfect for outdoor adventures along the coast. The average temperature settles at a pleasant 16°C (61°F), providing a mild climate that invites locals and visitors to bask in the beauty of the changing season. Compared to the peak summer months of July and August, where maximum temperatures hover in the mid-20s, September maintains a refreshing warmth, marking a lovely balance of summer's lingering embrace and the anticipation of autumn. It's a time when the beaches are still inviting, yet the crowds have thinned, making it the ideal moment to enjoy the scenic charm of this picturesque seaside town.
September in Southwold, United Kingdom, is marked by moderate rainfall as the summer begins to wane. With an average precipitation of 67 mm (2.6 in) over 11 days, this month typically experiences a balance of wet and dry spells, keeping the landscape lush and green. While slightly lower than the 83 mm (3.2 in) recorded in August, the rainfall remains significant, hinting at the approach of autumn. This transition is also highlighted by an increase in rainy days in the following months, with October notably seeing a surge to 107 mm (4.2 in) across 15 days, setting the stage for the more persistent rains of the fall season.
September brings a refreshing transition in Southwold, United Kingdom, as humidity levels settle at 84%. This month marks a noticeable shift from the drier summer months of July and August, which recorded 79% and 78% respectively. Although September's humidity is an increased embrace compared to late summer, it remains lower than the chillier months of late autumn and winter—October's 88% and the end-of-year averages hovering around 89%. This slight uptick in moisture signals the approach of the wetter autumn, offering a hint of cozy indoor comfort as the lush landscapes prepare for the upcoming seasonal changes.
As September arrives in Southwold, the UV Index reflects a shift towards more moderate sun exposure, registering at 5—a notable decline from the peak 8 encountered in the summer months. This seasonal transition indicates a moderate risk of harm from unprotected sun exposure, allowing for a burn time of approximately 30 minutes. Compared to the high levels seen in May through August, September invites a slight relaxation in sun safety without losing awareness. As autumn settles in, it's a perfect time to enjoy the outdoors while remaining mindful of UV protection. For more detailed information on UV levels throughout the year, check out Southwold UV Index.
UV Risk Categories
In Southwold, the transition from summer to autumn in September is marked by a delightful 315 hours of sunshine, a charming tapering off from the sun-drenched heights of mid-summer. While July boasts the peak with 422 hours, September still holds onto the warmth, offering a substantial amount of daylight ideal for leisurely strolls along the beach or enjoying the local cafés. As the year progresses, the hours of sunshine gradually decline, with October slipping to 240 hours and November further down to 156 hours. This gentle decrease in sunlight heralds the coming autumn, yet September’s pleasant glow lingers, inviting visitors to relish the last traces of summer in a picturesque coastal setting.
As summer transitions into autumn, September in Southwold, United Kingdom, showcases a 34% chance of sunny weather, mirroring the somewhat modest expectations set earlier in the season. This slight dip from the peak sunny days of July (41%) and August (35%) marks a continuation of a trend where the likelihood of sunshine begins to recede. Interestingly, September maintains a balance reminiscent of the springtime conditions in March (34%) and serves as a gentle nod to the cooler months ahead. While the sun may not shine as brightly as in the height of summer, its occasional glow in September invites visitors to enjoy the coastal charm before the much wetter days of autumn set in.
As September unfolds in Southwold, United Kingdom, daylight begins to gently wane, offering approximately 12 hours of light each day. This marks a noticeable transition from the bright, sun-drenched days of June and July, which boast a peak of 16 hours. While the daylight starts to decrease, September still bathes the town in a warm glow, bridging the vibrant summer months with the cooler autumn season. As the leaves start to change and the air turns crisp, the gradual reduction in sunlight serves as a reminder of the seasonal shift, leading into the cozy embrace of fall and the 10 hours of daylight expected in October.
As September breezes into Southwold, the average wind speed settles at a gentle 5.7 m/s (13 mph), offering a slight reprieve from the more vigorous gusts that characterize the earlier months. This marks a notable dip from May’s 6.2 m/s and August’s 6.6 m/s, suggesting that summer's energetic winds begin to wane as autumn approaches. The mild conditions of September create a perfect backdrop for leisurely coastal strolls, contrasting with the brisk winds of both October and the chilly January through March, where speeds peak at 7.9 m/s (18 mph). As the year progresses, the wind patterns reflect the seasonal shifts, making each month’s experience in Southwold uniquely enchanting.
The weather in Southwold 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 Southwold and find detailed weather information for every month.
September and January present distinct weather patterns, reflecting the transition from late summer to winter. In September, temperatures range from a minimum of 10°C (51°F) to a maximum of 21°C (70°F), with an average of 16°C (61°F). The month sees around 67 mm (2.6 in) of precipitation over 11 days, accompanied by a relatively high humidity level of 84%. In contrast, January is notably colder, with temperatures dipping to a minimum of 0°C (32°F) and peaking at 12°C (54°F), averaging just 6°C (43°F). The precipitation is slightly lower at 64 mm (2.5 in) over the same number of days, and humidity rises to 89%. For a more detailed look at January’s weather, check out Southwold weather in January.
September and February present strikingly different weather patterns. In September, temperatures range from a mild 10°C (51°F) to a comfortable maximum of 21°C (70°F), making it a pleasant month. The average temperature hovers around 16°C (61°F), with humidity levels at 84% and a total precipitation of 67 mm (2.6 in) spread over 11 days. In contrast, February experiences much colder conditions, with temperatures dipping to a minimum of -2°C (29°F) and only reaching a maximum of 12°C (54°F). The average temperature is significantly lower at 6°C (43°F), with precipitation slightly higher at 69 mm (2.7 in) over 13 days and humidity at 87%. For more detailed weather insights, check out Southwold weather in February.
In comparing the weather between September and March, we see notable differences in temperature and conditions. September enjoys milder temperatures, with an average of 16°C (61°F) and maximums reaching 21°C (70°F), making it a more pleasant month overall. In contrast, March is significantly cooler, with average temperatures around 7°C (45°F) and highs of only 12°C (54°F), alongside occasional frosty nights. Precipitation levels are somewhat similar, with September receiving 67 mm (2.6 in) over 11 days and March experiencing slightly less at 58 mm (2.3 in) across 13 days. Humidity remains high in both months, with March at 86% and September at 84%. For a detailed look at March's weather specifics, you can visit Southwold weather in March.
In comparing the weather of September and April, it becomes clear that September is significantly warmer and wetter. The average temperature in September reaches 16°C (61°F), with highs of 21°C (70°F), while April's average is much cooler at 8°C (47°F), peaking at 14°C (58°F). Additionally, September experiences more precipitation, with 67 mm (2.6 in) across 11 days, compared to April's 24 mm (1.0 in) over just 6 days. Both months exhibit high humidity, with only a slight difference: September at 84% and April at 85%. For a more detailed look at April weather patterns, you can check Southwold weather in April.
September weather is generally milder compared to May, with average temperatures reaching up to 16°C (61°F) and maximums of 21°C (70°F), while May's averages only peak at 11°C (52°F). September also experiences slightly more rainfall, accumulating 67 mm (2.6 in) over about 11 days, compared to May's 51 mm (2.0 in) across 9 days. Humidity levels in both months are similar, hovering around 84% in September and 83% in May, making both months feel relatively damp. For a detailed look at May weather, you can check Southwold weather in May.
In comparing the weather of September and June, both months exhibit similar maximum temperatures, reaching up to 21°C (70°F). However, September typically has a slightly warmer average temperature of 16°C (61°F) compared to June's 15°C (59°F). Precipitation levels are also comparable, with September receiving about 67 mm (2.6 in) over 11 days and June experiencing 60 mm (2.4 in) across 8 days. Humidity is marginally higher in September at 84%, versus 83% in June. For a detailed look at June's weather in Southwold, you can visit Southwold weather in June.
In comparing the weather of September and July, September tends to be cooler with a minimum temperature of 10°C (51°F), an average of 16°C (61°F), and a maximum of 21°C (70°F), while July boasts slightly warmer conditions with a minimum of 13°C (55°F), an average of 17°C (63°F), and a maximum of 24°C (75°F). Precipitation levels are fairly similar, with September receiving 67 mm (2.6 in) across 11 days and July slightly lower at 62 mm (2.5 in) also over 11 days. Humidity is higher in September at 84%, compared to July's 79%. For a closer look at July's weather specifics, you can visit Southwold weather in July.
In comparing the weather of September and August, September tends to be cooler, with average temperatures ranging from a minimum of 10°C (51°F) to a maximum of 21°C (70°F), while August features slightly warmer temperatures, with a minimum of 12°C (54°F) and a maximum of 23°C (73°F). Additionally, September experiences more humid conditions, averaging 84% humidity compared to August's 78%. Precipitation levels are also notable; September receives about 67 mm (2.6 in) over 11 days, while August sees a higher total of 83 mm (3.2 in) across 12 days. For a closer look at August's weather specifics, you can visit Southwold weather in August.
September and October weather exhibit noticeable differences. In September, the temperatures are milder, with a minimum of 10°C (51°F) and an average of 16°C (61°F), peaking at a maximum of 21°C (70°F). However, as October arrives, temperatures drop slightly, with a minimum of 7°C (46°F) and an average of 14°C (57°F), reaching a maximum of 19°C (67°F). Precipitation also increases from 67 mm (2.6 in) over 11 days in September to 107 mm (4.2 in) over 15 days in October, revealing a trend towards wetter weather. Humidity rises as well, from 84% in September to 88% in October. For a detailed look at the conditions, you can check Southwold weather in October.
In comparing the weather between September and November, a distinct drop in temperatures is evident. September boasts warmer conditions with a minimum temperature of 10°C (51°F) and an average of 16°C (61°F), while November sees a further decline, with a minimum of just 3°C (38°F) and an average of 10°C (50°F). Despite both months receiving the same amount of precipitation at 67 mm (2.6 in), November has slightly more rainy days, averaging 13 compared to September's 11. Additionally, humidity levels rise in November, reaching 89% compared to September's 84%. For more detailed insights into November’s weather specifics, visit Southwold weather in November.
September and December present quite contrasting weather conditions. In September, temperatures typically range from a pleasant 10°C (51°F) at night to a comfortable high of 21°C (70°F) during the day, with an average of 16°C (61°F). The month experiences 67 mm (2.6 in) of precipitation over approximately 11 days and a relatively high humidity of 84%. In contrast, December brings cooler temperatures, with nighttime lows dropping to around 2°C (36°F) and daytime highs peaking at 13°C (55°F), averaging just 8°C (46°F). The month sees increased rainfall, totaling 114 mm (4.5 in) over 18 days, and a slight increase in humidity to 88%. For more detailed information, you can check Southwold weather in December.
As September unfolds in Southwold, the weather begins to transition, offering a blend of mild temperatures and increased precipitation compared to the summer months. With an average warmth hovering around a comfortable 16°C (61°F), outdoor enthusiasts can still enjoy the scenic beauty, albeit with a notable uptick in rainfall—approximately 67 mm over 11 days. The high humidity of 84% adds a subtle edge to the crispness in the air, signaling the shift towards autumn. This month stands out for its refreshing breezes and occasional showers, making it a unique time to explore the charm of Southwold. For a deeper dive into the region's climate, visit Southwold Climate.