Last updated: August 27, 2025
In Lysekil, Sweden, September brings a mix of mild temperatures and significant moisture, making it a unique month for visitors. The maximum temperature reaches 23°C (73°F), offering glimpses of warmth, while the average hovers around 14°C (57°F), perfect for outdoor exploration. However, early autumn also introduces cooler nights, with minimum lows dipping to 3°C (38°F). Rainfall is frequent, with 105 mm (4.1 in) accumulated over 15 days, contributing to a high humidity level of 86%. This combination of elements creates a vibrant yet variable atmosphere, inviting travelers to experience the stunning coastal scenery of Lysekil amidst the changing weather.
As September unfolds in Lysekil, Sweden, the transition from summer's warmth to autumn's crispness begins to take shape. With daily temperatures averaging around 14°C (57°F), there's a pleasant balance in the air, characterized by gentle breezes and sunny afternoons. The month sees a minimum of 3°C (38°F), signaling the arrival of cooler nights, while daytime highs can reach a comfortable 23°C (73°F). This marks a significant drop from the warm summer months, yet September retains a hint of lingering warmth, offering opportunities to enjoy the stunning coastal scenery before winter sets in. As the vibrant hues of fall begin to paint the landscape, the delightful weather makes Lysekil an ideal spot for outdoor adventures and cozy gatherings.
September marks a significant peak in precipitation for Lysekil, Sweden, with rainfall totaling 105 mm (4.1 in), matching August's totals and setting the stage for the wetter months ahead. This month experiences 15 days of rain, indicating a shift towards a more persistent wet weather pattern as autumn unfolds. Following a relatively dry April with only 34 mm (1.4 in), the precipitation begins to climb steadily, culminating in October's 120 mm (4.7 in), which showcases the region's transition into its rainiest season. The upward trend in both the total precipitation and the number of rainy days highlights the increasing moisture that characterizes the Swedish coastal climate as summer gives way to fall.
In September, humidity in Lysekil, Sweden experiences a noticeable increase, reaching 86% as summer transitions into autumn. This rise follows a relatively mild period during the summer months, where humidity levels hovered around the low 70s. As the days shorten and temperatures cool, the humidity tends to spike, reflecting the wet conditions characteristic of the approaching fall months. Notably, September’s humidity is a precursor to the higher levels that define the later months of the year, with October and November experiencing even greater moisture at 92% and 93%, respectively. This trend underscores the distinct seasonal shift, as the lush landscapes of Lysekil brace for the wetter weather of autumn.
As summer transitions to autumn in Lysekil, September brings a UV Index of 4, placing it in the moderate exposure category. This marks a gradual decline from the peak of 7 experienced in July and August, where sun-seekers needed to be mindful of quick burn times of just 25 minutes. In contrast, September allows for 30 minutes of sun exposure before the risk of skin damage increases, indicative of shorter days and waning sunlight. This trend underscores the importance of adjusting sun protection habits as we move into fall. For detailed insights on UV levels year-round, check out Lysekil UV Index.
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In Lysekil, Sweden, September ushers in a delightful transition, offering 307 hours of sunshine that gracefully bridges the vibrant summer months and the cool embrace of autumn. This solar bounty follows a peak in July with 477 hours, gradually tapering off as the days grow shorter. The sunny days of September not only extend the warmth of summer but also invite residents and visitors alike to indulge in the stunning coastal beauty. With the sun's prominence diminishing towards October, which sees 246 hours, September assumes the role of a golden period, a last flourish of brightness before the winter chill begins to settle in. Embracing a wealth of sunshine during this month, Lysekil stands as a charming locale where the hues of summer linger just a bit longer.
In Lysekil, Sweden, the likelihood of sunny weather in September trends downward, with just a 29% chance of sunshine. Following the vibrant summer months of June through August, where sunshine is more prevalent, September marks a subtle transition into autumn, characterized by diminishing daylight and cool breezes. This decline in sunny days reflects a broader seasonal pattern, as the chances of sun continue to decrease towards the year’s end, with October and November presenting even lower probabilities. Overall, while September may offer a few bright days, it's a time when nature begins to don its autumn cloak, making those rare sunny moments all the more precious.
As summer transitions into autumn in Lysekil, Sweden, September brings a gentle decline in daylight, with the sun gracing the skies for approximately 12 hours each day. This marks a notable shift from the long, sun-soaked days of June and July, which enjoy up to 18 hours of daylight. While this reduction signals the fading warmth of summer, September still retains a pleasant balance with more daylight than the shorter months ahead. As the vibrant hues of fall begin to paint the landscape, Lysekil experiences a gradual dimming, paving the way for the crisp autumn days that follow in October, which offers just 10 hours of daylight.
As September rolls into Lysekil, Sweden, a gentle breeze begins to weave through the coastal town, with an average wind speed of 4.2 m/s (9 mph). This marks a transition from the calmer breezes of the summer months, where July and August both recorded lower winds of 3.7 m/s (8 mph). Interestingly, September's winds mirror January's, suggesting a rhythmic ebb and flow in the coastal climate as the seasons shift. The steady winds hint at a gradual increase heading into October, where averages rise to 5.7 m/s (13 mph), setting the stage for a more robust wind that characterizes the fall months. Overall, September serves as a gentle reminder of nature’s cycles, blending the warmth of late summer with the inviting promise of autumn's arrival.
Weather in Lysekil varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Lysekil, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present starkly contrasting weather conditions. In September, temperatures range from a mild 3°C (38°F) at night to a pleasant 23°C (73°F) during the day, with an average of 14°C (57°F). The month is characterized by higher precipitation, totaling 105 mm (4.1 in) over 15 days, alongside a humidity level of 86%. In contrast, January experiences a significant drop in temperatures, with nighttime lows plunging to -11°C (12°F) and daytime highs only reaching 9°C (49°F), resulting in an average temperature of just 2°C (36°F). Additionally, January sees less precipitation at 58 mm (2.3 in) over 10 days, but the humidity rises slightly to 94%. For a more detailed look at weather conditions during this winter month, check out Lysekil weather in January.
In September, the weather is significantly milder compared to February, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 23°C (73°F) and an average of 14°C (57°F). This month typically experiences about 105 mm (4.1 in) of precipitation over 15 days, coupled with a humidity level of 86%. In contrast, February is much colder, with temperatures dropping to a minimum of -14°C (8°F) and averaging just 1°C (35°F), peaking at 11°C (51°F). February sees less precipitation at around 70 mm (2.7 in) over 11 days, along with a higher humidity of 92%. For more details on February weather in this region, you can check Lysekil weather in February.
When comparing the weather in September and March, noticeable differences emerge in both temperature and precipitation. September experiences a milder climate with average temperatures hovering around 14°C (57°F) and a maximum of 23°C (73°F), while March is significantly colder, with average temperatures at just 3°C (38°F) and a maximum of 12°C (53°F). In terms of precipitation, September receives more rainfall at 105 mm (4.1 in) over 15 days, compared to March, which has 67 mm (2.6 in) over 11 days. Both months display high humidity, with September at 86% and March slightly higher at 89%. For a more detailed look at weather patterns specific to March, visit Lysekil weather in March.
In comparing the weather between September and April, it's evident that September is generally warmer, with average temperatures ranging from 14°C (57°F) to a high of 23°C (73°F), compared to April's cooler range of 7°C (44°F) on average, with maximum temperatures reaching 20°C (68°F). September also experiences significantly more precipitation, totaling 105 mm (4.1 in) over about 15 days, whereas April sees only 34 mm (1.4 in) across just 7 days. Despite this, both months share a relatively high humidity level, with September at 86% and April at 82%. For more detailed information on April weather specifically, you can check Lysekil weather in April.
In September, temperatures typically range from a minimum of 3°C (38°F) to a maximum of 23°C (73°F), with an average of 14°C (57°F). The month also sees considerable precipitation, averaging 105 mm (4.1 in) over about 15 days, coupled with relatively high humidity at 86%. In contrast, May features slightly cooler temperatures, with a minimum of 1°C (34°F) and a maximum of 28°C (83°F), resulting in an average of 11°C (53°F). May experiences less precipitation, around 60 mm (2.4 in) over 11 days, and enjoys lower humidity levels at 73%. For a detailed look at the weather specifics in May, you can check Lysekil weather in May.
When comparing the weather in September and June, notable differences emerge in both temperature and precipitation. September tends to be cooler, with average temperatures ranging from a minimum of 3°C (38°F) to a maximum of 23°C (73°F), while June boasts warmer averages of 8°C (47°F) to 28°C (83°F). Additionally, September experiences higher humidity levels at 86%, compared to June's more comfortable 71%. Precipitation is also more frequent in September, with 105 mm (4.1 in) over 15 days, contrasted to June's 66 mm (2.6 in) over 11 days. For a closer look at June weather specifics, you can check Lysekil weather in June.
In September, the weather cools significantly compared to July, with minimum temperatures dropping to 3°C (38°F) and average highs reaching only 23°C (73°F), contrasting with July's warmer temperatures, where minimums are around 9°C (48°F) and maximums can soar to 30°C (86°F). Precipitation also increases in September, averaging 105 mm (4.1 in) across 15 days, compared to July's 79 mm (3.1 in) over just 10 days. Additionally, September experiences higher humidity levels at 86%, while July maintains a more comfortable 72%. For more specifics on July weather, you can check Lysekil weather in July.
In comparing the weather of September and August, we notice a significant drop in temperature. September experiences a minimum of 3°C (38°F) and averages around 14°C (57°F), while August remains warmer, with minimums around 8°C (47°F) and an average of 17°C (62°F). Moreover, August can reach maximum temperatures of 30°C (87°F), far surpassing September's maximum of 23°C (73°F). Both months receive similar levels of precipitation, with September slightly higher at 105 mm (4.1 in) compared to 104 mm (4.1 in) in August, but they both share 15 days of rainfall. Additionally, the humidity in September is notably higher at 86%, compared to 77% in August. For more detailed insights, you can check out Lysekil weather in August.
September and October exhibit a noticeable shift in weather patterns. In September, temperatures range from a minimum of 3°C (38°F) to a maximum of 23°C (73°F), with an average of 14°C (57°F) and 105 mm (4.1 in) of precipitation occurring over 15 days. Humidity sits at a relatively high 86%. In contrast, October brings cooler temperatures, with a minimum of -2°C (30°F), an average of 10°C (50°F), and a maximum of 19°C (66°F). Precipitation increases slightly to 120 mm (4.7 in) over 17 days, and humidity rises to 92%. This transition marks October as a month of further cooling and increased dampness. For more detailed weather observations, check out Lysekil weather in October.
In September, the weather is relatively mild, with temperatures ranging from a minimum of 3°C (38°F) to a pleasant average of 14°C (57°F) and reaching a maximum of 23°C (73°F). During this month, the area experiences about 105 mm (4.1 in) of precipitation over 15 days, with humidity levels averaging 86%. In contrast, November ushers in colder temperatures, with a minimum of -9°C (16°F), an average of 6°C (43°F), and a maximum reaching only 15°C (59°F). While precipitation decreases slightly to 91 mm (3.6 in) over the same number of rainy days, humidity rises to 93%. For a more detailed look at November weather, visit Lysekil weather in November.
September presents a much milder climate compared to December, with average temperatures ranging from 3°C (38°F) to a comfortable 23°C (73°F), while December sees averages drop significantly to between -9°C (15°F) and 10°C (51°F). The autumn month experiences a higher average temperature of 14°C (57°F) and about 105 mm (4.1 in) of precipitation over 15 days, contributing to a humidity level of 86%. In contrast, December, although slightly drier with 80 mm (3.2 in) of rain, has a higher humidity at 93%, indicating a distinct shift towards colder and wetter conditions. For more specific insights, you can check the Lysekil weather in December.
As September rolls in, Lysekil transitions from the warmth of summer toward the crispness of autumn. This month typically showcases a pleasing mix of mild temperatures with a maximum reaching around 23°C (73°F), yet often accompanied by cooler breezes and an average of 14°C (57°F). While the days can still feel warm, evenings start to bring a chill, reminding us that fall is on its way. Rainfall increases, contributing to a humid atmosphere that lingers around 86%. With about half the month experiencing precipitation, it’s a time when one should be prepared for spontaneous showers. This seasonal shift can be both refreshing and unpredictable, marking a unique period in Lysekil’s climate that sets the stage for the beauty of autumn to unfold. For a deeper dive into how Lysekil's weather varies throughout the year, explore the detailed insights at Lysekil Climate.