Last updated: August 27, 2025
September in Kalmar, Sweden offers a captivating blend of mild temperatures and refreshing rain. With daily highs reaching up to 24°C (76°F) and an average temperature of 14°C (57°F), the month presents comfortable conditions for exploration. However, the weather can turn brisk with nighttime lows dipping to 2°C (36°F). Expect 55 mm (2.2 in) of rainfall over 9 days, contributing to the lush, vibrant scenery characteristic of this time of year. Humidity levels hover around 81%, adding to the soft, enveloping atmosphere of Kalmar in the early autumn months. Whether strolling through its historic streets or enjoying the coastal views, September is a delightful time to experience the charm of this seaside town.
As September arrives in Kalmar, Sweden, a noticeable transition in temperatures begins to unfold. With minimums dipping to around 2°C (36°F), the warmer summer days retreat, yet the average temperature hovers at a comfortable 14°C (57°F), providing a pleasant backdrop for outdoor activities. The month can still surprise with highs reaching up to 24°C (76°F), allowing for a final taste of summer warmth before the chill of autumn sets in. This gradual cooling trend is a departure from the balmy August, making September a delightful time to experience the natural beauty of Kalmar as the leaves begin to change and the landscape prepares for the cooler months ahead.
September in Kalmar, Sweden, sees a balance of precipitation as it garners 55 mm (2.2 in) of rain over nine days, making it one of the wetter months of the year. This amount is slightly less than the preceding month of August, which recorded 59 mm (2.3 in), yet more substantial than April's drier 25 mm (1.0 in). As summer transitions into autumn, September’s rain contributes to a gradual buildup in precipitation, heralding the wetter months to come. The consistent rainfall, coupled with diminishing temperatures, creates a refreshing yet moody atmosphere, characteristic of this beautiful coastal city.
In September, Kalmar, Sweden experiences a notable shift in humidity, averaging 81%. This figure marks a rise from the drier summer months of June and July, where humidity dipped to a comfortable 68%. As autumn approaches, the increasing moisture level signals a transition as the air begins to cool and the vibrant colors of the season emerge. Notably, September's humidity also hints at the return of the heavier, cloud-laden atmosphere typical of the region, before it escalates again to 87% by October. This trend highlights the cyclical nature of Kalmar’s climate, as summer warmth gives way to the briskness and depth of fall.
In September, Kalmar, Sweden experiences a UV Index of 5, which falls into the moderate exposure category. This indicates a shift from the high levels seen in the summer months, as both July and August peaked at a UV Index of 7. As the season transitions into autumn, residents and visitors should still take precautions with a burn time of 30 minutes for unprotected skin. This moderate exposure is a reminder of the changing sun strength as we move away from the summer sun, yet it emphasizes the importance of sun safety, especially during the clear and sunny days of early fall. For a comprehensive look at UV levels throughout the year, visit Kalmar UV Index.
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As summer fades and autumn begins, September in Kalmar, Sweden is a delightful transition marked by 305 hours of sunlight, offering a warm embrace before the darker months set in. Following the peak of summer, where the sun shone relentlessly with 458 hours in July, September reflects a noticeable drop yet remains bright compared to the early months of the year. While January barely graces the calendar with a mere 93 hours, the steady increase from winter through spring to summer illustrates a journey toward brightness that culminates in vibrant autumn hues. With sunlight still abundant in September, this month serves as a beautiful reminder that even as the days grow shorter, there’s still warmth to be found in Kalmar's rich, golden light.
In September, the chance of sunny weather in Kalmar, Sweden leans towards 31%, marking a decline from the summer's peak but still offering a respectable opportunity for clear skies. As the season transitions from the vibrant summer months—where June boasts the highest likelihood at 52%—the prospect of sunshine gradually dims, with sunny days becoming less frequent than in the preceding months of July and August. This trend reflects the inevitable shift towards autumn, where the cooler temperatures and reduced daylight hours contribute to fewer sunny spells. Nonetheless, for those yearning for a late-summer escape, September still possesses its charm, inviting sun seekers to relish the warmth while it lasts.
As summer fades in Kalmar, Sweden, September brings a gentle reduction in daylight, offering around 12 hours of sunshine each day. Following the long, bright days of June and July, which enjoy 17 hours of daylight, September signals the transition towards autumn with a notable shift. Although daylight decreases, it still holds onto the warmth of summer’s tail end, outshining the shorter months that follow. As the year progresses, the steady decline in daylight hours— from a peak of 16 hours in May to a mere 7 hours by January—highlights the contrasting beauty of the seasons, inviting both reflection and anticipation for the changes ahead.
As September ushers in the transition from summer to autumn in Kalmar, Sweden, the average wind speed settles at a gentle 4.0 m/s (9 mph). This month marks a subtle shift from the summer's milder breezes, highlighted by a slight increase from July's average. Notably, the wind speeds during September are consistent with the autumnal trend, where the months ahead—October and November—experience a gradual uptick, hovering around 4.4 m/s (10 mph). Overall, the winds of September carry the promise of change, creating a refreshing prelude to the brisker gusts that define the approaching months.
Weather in Kalmar varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Kalmar, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is notably milder compared to January, with average temperatures reaching a comfortable 14°C (57°F) and highs of 24°C (76°F). The month experiences relatively moderate precipitation at 55 mm (2.2 in) over approximately 9 days, paired with a humidity level of 81%. In contrast, January brings much chillier conditions, with average temperatures plummeting to just 1°C (35°F) and lows dropping to -14°C (6°F). Precipitation decreases slightly to 40 mm (1.6 in) over 8 days, but the humidity rises to 90%, giving the air a crisp feel. For more details on the chilly winter season, check out Kalmar weather in January.
In September, the weather in Kalmar is significantly milder, with temperatures ranging from a minimum of 2°C (36°F) to a maximum of 24°C (76°F) and an average of 14°C (57°F). The month experiences about 55 mm (2.2 in) of precipitation over approximately 9 days, along with a humidity level of 81%. In contrast, February brings much colder conditions, with temperatures dropping to a minimum of -15°C (6°F) and averaging just 1°C (35°F). The maximum temperature can reach 14°C (57°F), but the overall chill is accompanied by 48 mm (1.9 in) of precipitation spread across 11 days, and a higher humidity of 89%. For a deeper look at the conditions during this winter month, check out Kalmar weather in February.
In comparing the weather between September and March, one can observe distinct differences in temperature and conditions. September features a milder climate with average temperatures ranging from 2°C (36°F) to a pleasant maximum of 24°C (76°F), alongside a lower precipitation level of 55 mm (2.2 in) over about 9 days. In contrast, March presents a sharper chill, characterized by minimum temperatures plummeting to -9°C (15°F), while the average hovers around 3°C (38°F), with a maximum of 17°C (63°F). Precipitation in March is slightly less at 49 mm (1.9 in), but it occurs over more days, approximately 12. Additionally, March experiences higher humidity levels at 88% compared to September's 81%. For a more detailed perspective on the weather, you can check out Kalmar weather in March.
September and April present distinct weather patterns, with September generally being milder and more stable. In September, temperatures range from a minimum of 2°C (36°F) to a maximum of 24°C (76°F), averaging around 14°C (57°F). The month sees an average precipitation of 55 mm (2.2 in) over about 9 days and maintains a humidity level of 81%. In contrast, April experiences cooler temperatures, with a minimum of -6°C (21°F) and a maximum of 20°C (69°F), resulting in an average of 6°C (43°F). It also has lower precipitation, totaling 25 mm (1.0 in) over 6 days, while the humidity is slightly higher at 82%. For more details on what to expect in April, check out Kalmar weather in April.
September and May present contrasting weather patterns. September generally enjoys milder temperatures, with a minimum of 2°C (36°F) and a maximum reaching 24°C (76°F), while May, despite its warmer maximum of 27°C (81°F), starts with cooler minimums down to -1°C (30°F). Precipitation levels are slightly higher in September at 55 mm (2.2 in) over about 9 days compared to May's 44 mm (1.7 in) over 10 days, and the humidity is notably higher in September at 81%, compared to 72% in May. For more detailed insights into May's weather, check out Kalmar weather in May.
September weather tends to be cooler than June, with temperatures ranging from a minimum of 2°C (36°F) to a maximum of 24°C (76°F), compared to June's range of 6°C (43°F) to 29°C (84°F). The average temperature in September is 14°C (57°F), while June enjoys a more moderate average of 17°C (63°F). Humidity is higher in September at 81%, compared to 68% in June, contributing to a more crisp and brisk feel. Additionally, September receives slightly more precipitation (55 mm over 9 days) than June, which averages 41 mm over 8 days. For a detailed look at the weather in June, visit Kalmar weather in June.
In comparing the weather between July and September, we notice a significant decline in temperatures as summer transitions into autumn. July experiences a warmer climate, with average temperatures around 18°C (65°F) and maximums reaching up to 29°C (85°F), making it the warmest month. In contrast, September showcases a cooler average of 14°C (57°F) and maximums of 24°C (76°F), with the minimum dropping to 2°C (36°F). Both months experience similar amounts of precipitation, with July receiving 48 mm (1.9 in) over 9 days and September slightly wetter at 55 mm (2.2 in) over the same number of days. Additionally, humidity levels are higher in September at 81%, compared to 68% in July. For a deeper understanding of July's climate, you can check Kalmar weather in July.
September weather presents a notable contrast to August, with cooler temperatures overall. The minimum temperature in September drops to 2°C (36°F), compared to a more mild minimum of 8°C (47°F) in August. While the average temperature in September is 14°C (57°F), August boasts a higher average of 18°C (64°F), peaking at a warm 31°C (87°F) compared to September's maximum of 24°C (76°F). Precipitation is slightly less in September at 55 mm (2.2 in) over 9 days, while August sees 59 mm (2.3 in) over 11 days, though humidity rises in September to 81%, contrasting with August's 73%. For more detailed insights on weather conditions in August, visit Kalmar weather in August.
September and October offer distinct weather shifts, marking the transition into autumn. In September, temperatures range from a minimum of 2°C (36°F) to a maximum of 24°C (76°F), with an average of 14°C (57°F), accompanied by 55 mm (2.2 in) of precipitation over 9 days and a humidity level of 81%. However, as October arrives, the temperature drops slightly, with a minimum of -1°C (30°F) and a maximum of 19°C (66°F), resulting in an average of 10°C (50°F). Additionally, October experiences increased rainfall, totaling 67 mm (2.6 in) across 12 days, alongside a rise in humidity to 87%. For more details on weather patterns during this month, you can visit Kalmar weather in October.
In September, the weather presents a mild climate with temperatures ranging from a minimum of 2°C (36°F) to a pleasant maximum of 24°C (76°F). This month sees an average temperature of 14°C (57°F) and experiences around 55 mm (2.2 in) of precipitation over about 9 days, accompanied by a humidity level of 81%.
In contrast, November ushers in much colder conditions, with temperatures dropping significantly to a minimum of -6°C (22°F), while the maximum reaches only 16°C (61°F), resulting in an average temperature of 6°C (43°F). Precipitation is similar at 51 mm (2.0 in), but it occurs on 11 days, and humidity increases to 89%. Overall, November's chill and dampness mark a notable transition from the milder September weather. For more details, check out Kalmar 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 24°C (76°F) and an average of 14°C (57°F). There is also a moderate level of precipitation, totaling 55 mm (2.2 in) over about 9 days, accompanied by a humidity level of 81%. In contrast, December brings much colder conditions, with temperatures dipping to a minimum of -9°C (16°F) and peaking at just 10°C (51°F), averaging around 3°C (37°F). The precipitation slightly increases to 60 mm (2.4 in) spread over 15 days, and humidity rises to 88%. For a more detailed look at December's weather, you can visit Kalmar weather in December.
As September unfolds in Kalmar, the weather begins to transition from the warmth of summer to the crispness of autumn. With an average temperature that hovers around a refreshing 14°C (57°F), days can still be pleasantly warm with the occasional peak of 24°C (76°F). However, as evening approaches, a chill creeps in, reminding us that winter is on the horizon with nighttime lows dipping to 2°C (36°F). While September brings about a notable increase in humidity levels, which can feel quite pronounced at 81%, it also sees a fair share of rain, with precipitation occurring on roughly one-third of the month. This blend of warmth and moisture marks September as a unique month in Kalmar's climate, a time when the vibrant hues of fall begin to emerge. For a deeper dive into the climatic patterns that shape this beautiful locale, visit Kalmar Climate.