Last updated: March 17, 2025
September in Helensburgh, United Kingdom, presents a vibrant tapestry of weather as summer transitions into autumn. With maximum temperatures reaching 25°C (77°F) and an average of 12°C (54°F), this month showcases a delightful variance in climate. However, residents and visitors should prepare for the possibility of rain, as 135 mm (5.3 in) of precipitation falls over 17 days, contributing to the area's lush greenery. High humidity levels at 88% add a refreshing twist to the air, making it an excellent time for outdoor exploration amidst scenic coastal views and historical charm.
As September unfolds in Helensburgh, temperatures begin to show a noticeable shift, heralding the approach of autumn. With minimums dipping to -3°C (27°F) and an average of 12°C (54°F), this month marks a transition from the warmer summer days, yet still offers a pleasant maximum of 25°C (77°F). This creates a unique atmosphere where the lingering warmth of late summer collides with the crispness of approaching fall, inviting both locals and visitors to enjoy outdoor activities amidst the changing scenery. The contrast in temperatures sets the stage for cozy sweaters and the stunning colors of autumn foliage, making September a wonderfully dynamic time in this charming part of the United Kingdom.
September in Helensburgh continues the trend of autumnal transitions, bringing 135 mm (5.3 in) of rain over 17 days. This moderate precipitation amount reflects a slight decrease from the previous month, August, which recorded a substantial 183 mm (7.2 in) across 22 days. As summer fades, September's wetness signifies the region’s shift toward wetter, cooler months, aligning closely with October's anticipated increase to 202 mm (7.9 in). This rhythmic pattern highlights Helensburgh's temperate maritime climate, where rainfall plays a vital role in the lush landscapes that define the region's charm.
In September, Helensburgh experiences a notable rise in humidity, peaking at 88%, a level reminiscent of the earlier winter months. This increase is part of a seasonal trend where humidity levels gradually decline from the start of the year but begin to creep back up as autumn approaches. Following the relatively stable humidity of July and August, September marks a transition, setting the stage for the wetter months ahead. As the year progresses, humidity levels are anticipated to climb again, reaching their highest points in November and December, reflecting the town's characteristic maritime climate.
As we transition from the warmth of summer to the crispness of autumn in September, Helensburgh experiences a moderate UV Index of 5, signaling a continued need for sun protection during outdoor activities. This marks a slight decrease from the peak levels of very high at 8 seen in July and June, but still requires caution, particularly during midday hours. With a burn time of around 30 minutes, residents and visitors should remember to apply sunblock and seek shade when necessary, maintaining awareness of their sun exposure. As the UV levels gradually drop heading into the cooler months, it's essential to stay informed about changing conditions. For detailed UV forecasts, visit Helensburgh UV Index.
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As summer gracefully transitions to autumn, September in Helensburgh offers a delightful blend of warmth and sunshine, with an impressive 272 hours of sunlight illuminating the days. This marks a gradual decline from the sun-drenched days of the summer months, which average around 389 hours in July. However, September still enjoys significantly more sunshine than the gloomy winter months, such as January and December, which only muster 66 hours each. The sun's rays linger longer in early autumn, inviting both locals and visitors to bask in the mild weather and stunning coastal views. The shift in daylight sets the stage for a picturesque fall, where each ray of sunshine draws community members outside to savor the lingering warmth before winter descends.
In Helensburgh, the prospect of sunny weather in September is relatively low, with only a 15% chance of sunshine. This represents a notable decline from the more promising 46% in April, suggesting a retreat into the cloudier days of autumn. As the summer months progress, the likelihood of sunshine hovers around the low twenties, with July and August offering slightly better prospects at 25% and 23% respectively. However, September is a month where blue skies become less common; the fading warmth of summer gives way to increased rainfall and cloud cover, making it one of the less sunny months of the year in this charming corner of the United Kingdom.
As summer fades into autumn, September in Helensburgh, United Kingdom, sees a notable shift in daylight duration. With approximately 12 hours of daylight, the month serves as a gentle transition from the long, sun-drenched days of June and July, which boast a peak of 17 hours, to the shorter, cooler days of October, where daylight dips to 10 hours. This gradual decline marks the approach of winter, following the vibrant 16 hours of sunshine in May and settling into a rhythm that characterizes the changing seasons. As nature prepares for rest, September encapsulates a balance of light—enough to savor those lingering evenings while hinting at the cozy days ahead.
As the vibrant hues of autumn begin to paint Helensburgh in September, the gentle September winds blow at an average speed of 2.9 m/s (6 mph), a slight uptick from the languid breezes of summer. This transition reflects a broader trend, as wind speeds begin to gradually rise after the peaks of November and March, which boast higher averages at 4.0 m/s (9 mph) and 3.9 m/s (9 mph), respectively. In contrast, the summer months present the calmest conditions, with July and August featuring the lowest winds at just 2.1 m/s (5 mph) and 2.4 m/s (5 mph). As September unfolds, the invigorating shift in wind signals the approach of more spirited autumn days, inviting locals and visitors alike to revel in the beauty of the changing season.
The weather in Helensburgh 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 Helensburgh and find detailed weather information for every month.
September and January present distinct weather patterns, showcasing the transition from late summer to winter. In September, temperatures range from a minimum of -3°C (27°F) to a comfortable maximum of 25°C (77°F), with an average of 12°C (54°F). This month sees a significant amount of precipitation, totaling 135 mm (5.3 in) over approximately 17 days, accompanied by high humidity at 88%. In contrast, January experiences colder temperatures, with a minimum of -7°C (20°F) and a maximum of 13°C (55°F), averaging around 4°C (40°F). While January has slightly less precipitation at 117 mm (4.6 in) over 14 days, it maintains an even higher humidity level of 90%. For more information on January weather in Helensburgh, you can visit Helensburgh weather in January.
September and February present contrasting weather patterns that reflect the transition from late summer to early winter. In September, temperatures range from a chilly minimum of -3°C (27°F) to a pleasant maximum of 25°C (77°F), with an average of 12°C (54°F). The month sees about 135 mm (5.3 in) of precipitation over 17 days, accompanied by high humidity at 88%. In contrast, February introduces colder conditions with temperatures dropping as low as -8°C (18°F) and peaking at 13°C (56°F), averaging only 5°C (40°F). This month experiences increased precipitation at 195 mm (7.7 in) over 19 days, maintaining the same high humidity level of 88%. For more detailed information, see Helensburgh weather in February.
September and March present contrasting weather patterns that reflect the transition between seasons. In September, temperatures range from a minimum of -3°C (27°F) to a pleasant average of 12°C (54°F), with maximums reaching 25°C (77°F). The month experiences around 135 mm (5.3 in) of precipitation over 17 days and maintains a high humidity level of 88%. Conversely, March is cooler, with temperatures dipping to a minimum of -7°C (19°F) and a lower average of 6°C (42°F), peaking at 16°C (62°F). It also is slightly wetter, receiving 152 mm (6.0 in) of precipitation across 19 days, while humidity hovers around 86%. For more detailed insights into March weather, you can refer to Helensburgh weather in March.
When comparing the weather in September and April, September tends to be milder, with average temperatures around 12°C (54°F) and maximums reaching up to 25°C (77°F). This month also sees heavier precipitation, averaging 135 mm (5.3 in) over 17 days, contributing to a higher humidity of 88%. In contrast, April experiences cooler temperatures, with averages of 7°C (46°F) and maximums of 22°C (72°F). Additionally, precipitation is notably lower at 63 mm (2.5 in) over 13 days, paired with a slightly lower humidity of 85%. For more detailed information about April weather, you can visit Helensburgh weather in April.
In September, the weather tends to be milder with average temperatures ranging from -3°C (27°F) to a maximum of 25°C (77°F) and an overall average of 12°C (54°F). The month also experiences considerable precipitation, accumulating 135 mm (5.3 in) over 17 days, coupled with high humidity levels at 88%. In contrast, May sees slightly cooler temperatures, with a minimum of -1°C (30°F) and an average temperature of 10°C (51°F), while still reaching a maximum of 25°C (77°F). Precipitation during May is lower at 87 mm (3.4 in) over 14 days, and humidity is somewhat less at 80%. For more detailed insights, you can explore Helensburgh weather in May.
In comparing the weather patterns of September and June, we see notable differences despite their proximity in the calendar year. September experiences a wider range of temperatures, with minimums dipping to -3°C (27°F) and maximums reaching up to 25°C (77°F), resulting in an average temperature of 12°C (54°F). This month also sees considerable precipitation, totaling 135 mm (5.3 in) over 17 days, coupled with high humidity at 88%.
In contrast, June presents a milder climate with minimum temperatures starting at 4°C (39°F) and highs peaking at 28°C (82°F), leading to an average of 13°C (56°F). While June has slightly higher precipitation at 142 mm (5.6 in) over 18 days, it enjoys lower humidity at 83%. For more detailed weather information about June in Helensburgh, you can visit Helensburgh weather in June.
When comparing the weather in September and July, notable differences emerge. September experiences cooler temperatures, with a minimum of -3°C (27°F) and an average of 12°C (54°F), while July is warmer, with a minimum of 7°C (44°F) and an average of 15°C (59°F). Both months feature similar maximum temperatures, around 25°C (77°F) in September and 27°C (81°F) in July. Precipitation levels are slightly higher in September at 135 mm (5.3 in) over 17 days, compared to July's 123 mm (4.9 in) over 16 days. Additionally, humidity is more pronounced in September at 88%, versus 82% in July. For more details, you can check Helensburgh weather in July.
In comparing the weather of September and August, September experiences slightly cooler temperatures, with a minimum of -3°C (27°F) and an average of 12°C (54°F), while August has a milder minimum of 6°C (43°F) and an average of 14°C (58°F). Both months peak at 25°C (77°F), indicating that the hottest days remain consistent. September sees more precipitation, totaling 135 mm (5.3 in) over 17 days, compared to August's 183 mm (7.2 in) across 22 days. Interestingly, September also has a higher humidity level at 88%, compared to August's 82%. For more detailed insights on August's weather, you can check Helensburgh weather in August.
In September, the weather in Helensburgh features a wider temperature range, with minimums dipping to -3°C (27°F) and maximums reaching a pleasant 25°C (77°F). The month averages 12°C (54°F) and experiences about 135 mm (5.3 in) of rainfall over 17 days, alongside a humidity level of 88%. In contrast, October brings cooler temperatures, with average highs of only 19°C (67°F) and lows remaining at -3°C (27°F). The month sees increased rainfall, totaling 202 mm (7.9 in) over 21 days, and a slight rise in humidity to 90%. For more details on October weather in Helensburgh, check out Helensburgh weather in October.
September tends to have a milder climate compared to November, with average temperatures around 12°C (54°F) and maximums reaching up to 25°C (77°F). In contrast, November experiences cooler temperatures, with an average of 6°C (44°F) and a maximum of only 14°C (57°F). Precipitation is also notable in both months, with September receiving 135 mm (5.3 in) over 17 days, while November sees increased rainfall of 161 mm (6.3 in) across 18 days. Additionally, humidity levels rise slightly from 88% in September to 92% in November, contributing to a more damp and chilly atmosphere during the latter month. For more details, you can check Helensburgh weather in November.
September and December in Helensburgh present notable differences in weather patterns. September showcases a more generous temperature range, with minimums around -3°C (27°F) and maximums reaching up to 25°C (77°F), combined with an average of 12°C (54°F). In contrast, December brings cooler conditions, with temperatures dipping lower to a minimum of -6°C (21°F) and an average of just 5°C (41°F), while the maximum only reaches 12°C (54°F).
Precipitation also varies between the two months: September experiences about 135 mm (5.3 in) of rain over 17 days, whereas December sees increased rainfall at 161 mm (6.3 in) spread across 19 days. Humidity remains relatively high in both months, hovering around 88% in September and slightly increasing to 89% in December. For more specific details, you can refer to Helensburgh weather in December.
As September unfolds in Helensburgh, it brings a remarkable transition from the warm summer days to the cool embrace of autumn. With a maximum temperature that can reach up to a pleasant 25°C (77°F), the month offers a balmy farewell to summer. However, the average temperature dips to a cooler 12°C (54°F), while nighttime can bring a brisk chill, sometimes falling to -3°C (27°F). The frequency of precipitation, with 17 rainy days accumulating 135 mm (5.3 in), sets it apart from the drier summer months, contributing to the lush greenery that characterizes the local landscape. Coupled with a high humidity of 88%, September can feel distinctly damp compared to the preceding months. Embrace the beauty of this transition and explore more about the changing seasons in Helensburgh through our detailed Helensburgh Climate page.