Last updated: March 17, 2025
In Lerwick, United Kingdom, September ushers in a transition towards autumn, characterized by mild temperatures and significant rainfall. With a maximum temperature peaking at 15°C (59°F) and an average of 12°C (54°F), residents can expect cool and crisp days. However, the month also brings substantial precipitation, totaling 115 mm (4.5 in) over approximately 18 days, resulting in a humidity level of 87%. This blend of conditions creates a lush atmosphere, perfect for enjoying the stunning natural landscapes, albeit with an umbrella nearby.
In September, Lerwick experiences a gentle transition toward autumn, with temperatures that reflect a comforting mildness. Minimums hover around 8°C (46°F), while averages reach 12°C (54°F) and maximums strike a warm note at 15°C (59°F). This slight dip from the warmer summer months shows a gradual cooling trend, yet the early days of September still carry a hint of the lingering summer warmth. As the month progresses, the inviting conditions encourage locals and visitors alike to enjoy the vibrant landscapes, while the sea breezes provide a refreshing touch, making it a perfect time for exploration.
In September, Lerwick experiences a notable surge in precipitation, with an average of 115 mm (4.5 in) spread over 18 days. This marks a significant increase compared to the summer months, reflecting the transition into the wetter autumn season. As the warmth of summer fades, the city prepares for an impending deluge, with October typically bringing even heavier rainfall at 146 mm (5.8 in) over 23 days. The rising trend in precipitation underscores Lerwick's characteristic climate, highlighting a shift from the relatively drier months of April and May, which record only 51 mm (2.0 in) and 47 mm (1.8 in), respectively. This pattern illustrates the dramatic changes in weather that define life in this coastal town.
In September, Lerwick experiences a humidity level of 87%, which aligns with the relatively high humidity trend observed throughout the summer months. This month marks the tail end of the warm season, as humidity peaks in July at 89% and remains elevated in both August and September. Following this late-summer peak, the levels begin to stabilize, continuing at 87% into October, before gradually declining through the autumn months. The overall trend showcases Lerwick's maritime climate, characterized by persistently high humidity, particularly during the summer, ensuring that the air remains rich and invigorating even as autumn approaches.
In September, Lerwick experiences a moderate UV Index of 4, indicating that while the sun's rays can be stronger than in the earlier months, they are still manageable with appropriate precautions. This is a slight decrease from the high levels seen in the peak summer months of June and July, where the UV Index soared to 6 and 7 respectively. As the seasons transition, individuals can expect a safe burn time of 30 minutes before needing protection. Overall, as we move from summer to autumn, September marks the tail end of the more intense UV exposure, making it a great time to enjoy outdoor activities, especially when armed with knowledge on sun safety. For more details on UV exposure in Lerwick, visit the Lerwick UV Index.
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In September, Lerwick enjoys a transition of light, with approximately 285 hours of sunshine illuminating the vibrant landscape as summer wanes. This is a noticeable decline from the sun-drenched months of July and June, which bask in over 420 hours of sunlight, yet still offers a warm embrace before autumn takes hold. As the days shorten, sunshine begins to recede dramatically in October to 202 hours, leading into the darker months of the year. However, September's lingering warmth and light create a beautiful backdrop for the town's rich maritime culture and stunning coastal scenery, making it a captivating time to visit.
In Lerwick, United Kingdom, the likelihood of sunny weather in September remains modest, with a mere 14% chance of sun—a figure reflective of the trend observed throughout much of the late summer and early autumn. This month is part of a series marked by typically low percentages of sunny days, particularly in the surrounding months of July and August, which also struggle to reach beyond 17% and 14%, respectively. As the skies begin to cloud over more frequently with the arrival of October, it becomes clear that September's brief bursts of sunshine are a fleeting echo of the brighter summer days, making the prospect of sunny weather increasingly rare as the year progresses.
In September, Lerwick experiences a delightful transition as daylight begins to recede, offering about 12 hours of light each day. This marks a significant shift from the sun-drenched months of June and July, where the duration peaks at a remarkable 18 hours. Following the vibrant long days of summer, September's daylight creates a more balanced atmosphere, bridging the gap toward autumnal shorter days. With 12 hours of daylight, it’s an ideal time for outdoor activities, as the warmth of summer lingers just a bit longer before the days gradually dwindle into October's 10 hours and the stark 5 hours of December. As the seasons shift, Lerwick’s daylight patterns reflect the natural rhythms of change, inviting residents and visitors alike to savor the enchanting experience of early autumn.
As September unfolds in Lerwick, the winds begin to pick up after a summer lull, with an average speed of 7.6 m/s (17 mph). This marks a gentle increase from the calmer summer months, where July and August saw averages of 5.3 m/s (12 mph) and 5.9 m/s (13 mph), respectively. The transition signals a shift toward the blustery conditions typical of autumn, setting the stage for the gustier months ahead. Notably, the wind speeds begin to rise again in October, reaching 9.4 m/s (21 mph), while November peaks at 10.7 m/s (24 mph), showcasing Lerwick's evolving maritime character as summer gives way to the more tempestuous seasons. The overall trend reflects a rhythmic pattern of seasonal change, where the winds dance and dictate the tempo of life in this vibrant coastal town.
The weather in Lerwick 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 Lerwick and find detailed weather information for every month.
In September, weather conditions tend to be milder, with average temperatures ranging from a minimum of 8°C (46°F) to a maximum of 15°C (59°F), while January experiences consistently cooler temperatures, with averages between 2°C (35°F) and 11°C (52°F). Additionally, September sees higher precipitation levels, totaling 115 mm (4.5 in) across 18 days, compared to January’s 96 mm (3.8 in) over the same number of days. Humidity levels are also higher in September at 87%, whereas January's humidity is comparatively lower at 79%. For a detailed look at January weather specifically, you can check this link: Lerwick weather in January.
September and February exhibit notable differences in weather patterns. In September, temperatures range from a minimum of 8°C (46°F) to a maximum of 15°C (59°F), averaging around 12°C (54°F). The month sees considerable precipitation, accumulating 115 mm (4.5 in) over 18 days, accompanied by high humidity levels at 87%. In contrast, February has cooler temperatures with a minimum of 0°C (33°F), an average of 6°C (43°F), and a maximum of 10°C (51°F). While precipitation in February is slightly lower at 97 mm (3.8 in) over 19 days, humidity is also reduced to 79%. For more detailed insights on February weather, you can check out Lerwick weather in February.
In comparison to March, September in Lerwick boasts milder temperatures, with average highs reaching up to 15°C (59°F) compared to March's maximum of 9°C (49°F). Although both months experience significant rainfall, September tends to be wetter, with 115 mm (4.5 in) of precipitation over 18 days, while March sees 103 mm (4.1 in) spread over 20 days. Humidity levels are also slightly higher in September at 87%, compared to March's 81%. For further details on the weather in March, you can visit Lerwick weather in March.
When comparing the weather in September and April, notable differences emerge. September typically experiences milder temperatures, with averages around 12°C (54°F) and highs reaching 15°C (59°F), while April is cooler, with an average temperature of just 6°C (44°F) and maximums of 10°C (51°F). Additionally, September is significantly wetter, receiving 115 mm (4.5 in) of precipitation over 18 days, compared to April's 51 mm (2.0 in) spread over 13 days. Humidity levels are also slightly higher in September at 87%, compared to 82% in April, making mid to late fall feel more oppressive than early spring. For more detailed information, you can visit Lerwick weather in April.
In September, temperatures range from a minimum of 8°C (46°F) to a maximum of 15°C (59°F), with an average of 12°C (54°F). The month experiences significant precipitation, with 115 mm (4.5 in) falling over 18 days, contributing to a high humidity level of 87%. In contrast, May showcases milder conditions with a minimum temperature of 2°C (36°F) and a maximum of 12°C (54°F), averaging at 8°C (47°F). Additionally, May is drier, as it receives only 47 mm (1.8 in) of rain across 13 days and maintains a slightly lower humidity of 84%. For more detailed insights about the weather in Lerwick during this time, check Lerwick weather in May.
When comparing the weather in September and June, notable differences emerge in temperature, precipitation, and humidity. September generally experiences slightly warmer temperatures, with an average of 12°C (54°F) compared to June's average of 10°C (51°F). The maximum temperature in September reaches up to 15°C (59°F), while June's highest is 14°C (58°F). However, September is significantly wetter, with 115 mm (4.5 in) of precipitation over 18 days, as opposed to June's 53 mm (2.1 in) over just 12 days. Humidity levels also remain slightly higher in September at 87%, compared to June's 84%. For more detailed information, you can visit Lerwick weather in June.
When comparing the weather in September and July, we observe that September tends to be cooler, with average temperatures hovering around 12°C (54°F), while July has a slightly warmer average of 12°C (54°F) as well, but with a maximum of 17°C (63°F). Precipitation in September is significantly higher, with 115 mm (4.5 in) over 18 days, compared to July's 69 mm (2.7 in) over 12 days, making September noticeably wetter. Humidity is fairly consistent, with September at 87% and July slightly higher at 89%. For more specific details on July weather, you can check Lerwick weather in July.
In September, the weather tends to be slightly cooler than in August, with average temperatures ranging from a minimum of 8°C (46°F) to a maximum of 15°C (59°F). In contrast, August typically sees temperatures with a minimum of 10°C (50°F) and a similar maximum of 15°C (60°F). September also experiences increased precipitation, totaling 115 mm (4.5 inches) over 18 days, compared to August's 74 mm (2.9 inches) over 15 days. Despite the differences in temperature and rainfall, both months maintain a constant humidity level of 87%. For more details on August weather, you can check Lerwick weather in August.
September and October present a noticeable shift in weather patterns. In September, temperatures range from a mild 8°C (46°F) at night to a comfortable 15°C (59°F) during the day, with an average of 12°C (54°F). The month experiences significant rainfall, with 115 mm (4.5 in) spread over 18 days and consistent humidity at 87%. In contrast, October sees a slight drop in temperatures, with nighttime lows of 5°C (42°F) and daytime highs averaging 14°C (57°F), resulting in an overall average of 10°C (51°F). Rainfall increases to 146 mm (5.8 in) over 23 days, maintaining the same high humidity levels. For a more detailed look, check out Lerwick weather in October.
In September, the weather tends to be milder, with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 15°C (59°F), while the average temperature sits at around 12°C (54°F). This month also experiences considerable precipitation, with 115 mm (4.5 in) falling over 18 days, accompanied by high humidity at 87%.
In contrast, November sees a drop in temperatures, with a minimum of 3°C (38°F) and a maximum of 12°C (54°F), resulting in a lower average temperature of 8°C (47°F). The rainfall increases slightly to 133 mm (5.2 in) over 23 days, and humidity remains relatively stable at 85%. For more detailed information, you can refer to Lerwick weather in November.
Comparing the weather in September and December reveals notable differences. In September, temperatures range from a minimum of 8°C (46°F) to a maximum of 15°C (59°F), with an average of 12°C (54°F). The month experiences considerable precipitation, totaling 115 mm (4.5 in) over 18 days and a high humidity level of 87%. In contrast, December sees cooler temperatures, with a minimum of 3°C (37°F) and a maximum of 11°C (52°F), averaging at 7°C (45°F). Precipitation increases slightly to 137 mm (5.4 in) over 25 days, while humidity drops to 78%. For more details on the month, check out Lerwick weather in December.
As September unfolds in Lerwick, the weather transitions into a distinctly cooler and damper chapter of the year. With average temperatures hovering around a mild 12°C (54°F), this month marks a significant drop from the warmth of summer, inviting brisk breezes and an occasional chilling rain. Expect about 18 days of rainfall, contributing to the month's high humidity levels of 87%. This blend of cool temperatures and frequent precipitation offers a refreshing change, making September a month where nature prepares for the vibrant colors of autumn. For those seeking detailed insights into Lerwick's changing seasons, visit Lerwick Climate.