Last updated: March 17, 2025
September in Reykjanesbaer, Iceland is characterized by a mild yet unpredictable climate. With a maximum temperature reaching 13°C (56°F) and an average of 9°C (48°F), the weather remains cool, while the minimum dips to 1°C (34°F), heralding the onset of autumn. During this month, expect 171 mm (6.7 in) of precipitation spread over 21 days, contributing to the lush landscapes typical of the region. The high humidity level at 85% adds to the overall dampness, creating a distinct atmosphere. Whether you're exploring the stunning scenery or enjoying local culture, be prepared for the capricious weather that September brings to this unique part of Iceland.
As summer transitions into autumn, Reykjanesbaer, Iceland experiences a noticeable shift in September temperatures. The month begins with a brisk minimum of 1°C (34°F), hinting at the coolness ahead, while the average temperature settles around 9°C (48°F). Daytime highs reach a comfortable 13°C (56°F), offering a pleasant reprieve from the colder months that follow. Compared to August, where temperatures were slightly milder with averages nearing 11°C (52°F), September marks a clear descent into the chillier season, yet it still retains a cozy atmosphere perfect for enjoying the stunning landscapes. With each passing week, the landscape awakens to the vibrant colors of fall, reminding visitors of the beauty that accompanies the cooler temperatures.
September marks a significant peak in precipitation for Reykjanesbaer, Iceland, accumulating 171 mm (6.7 in) of rainfall over 21 days. This robust amount contrasts sharply with the drier summer months, where July and August recorded just 78 mm (3.1 in) and 89 mm (3.5 in), respectively. The transition into autumn brings a noticeable increase in both precipitation and rainy days, emphasizing a shift in weather patterns. As temperatures cool and daylight wanes, September serves as a precursor to the wetter fall months that follow, solidifying its reputation as one of the rainiest months in the region. Such climatic trends showcase Reykjanesbaer's dynamic weather, continuously shaped by its unique geographical position.
In September, Reykjanesbær experiences a slight dip in humidity, averaging around 85% after a summer peak of 88% in August. This month marks a transition as the warmth begins to recede, yet humidity remains high, consistent with late summer trends. It's fascinating to note that throughout the year, humidity levels in this coastal town fluctuate, peaking in July and August and gradually tapering off towards the colder months of October and November. Despite this decrease, September still holds onto significant moisture, making the air feel crisp yet familiar, a hallmark of Iceland’s unique climate.
As summer fades into autumn in Reykjanesbaer, Iceland, September offers a UV Index of 3, placing it in the moderate exposure category. This is a slight decrease from August, where the UV Index peaked at 4, highlighting the transition toward lower UV levels as the days grow shorter. Interestingly, September's burn time remains consistent at 30 minutes, ensuring that while the sun may be less intense than in the height of summer, precautions are still advisable for outdoor activities. The trend throughout the year shows a clear shift from low UV levels in winter to higher indices in summer, providing a fascinating glimpse into how one should adapt sun safety practices across the seasons. For further details and updates, check the Reykjanesbaer UV Index.
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In Reykjanesbær, Iceland, September brings a delightful transition from the vibrant summer months to the quieter fall season, gifting residents and visitors with 207 hours of sunshine. This marks a noticeable dip from the sun-drenched heights of May and June, which bask in excess of 340 hours. However, September still enjoys more sunshine than the drearier months of October and November, hinting at the lingering warmth of late summer. As the days shorten and the sun begins its retreat, September stands out as a beautiful bridge, offering a blend of waning light and early autumn charm, inviting people to explore its stunning landscapes before winter sets in.
In Reykjanesbaer, Iceland, the likelihood of sunny weather in September stands at a modest 15%, reflecting a trend of increasing sunshine from the depths of winter. While the summer months see their peak in sunshine with May at 49%, September experiences a significant drop, falling back into the lower percentages typical of the early autumn. Notably, both July and August exhibit even less promise with only 13% and 12% chance of sun, yet September’s chances begin to mirror those of the colder months ahead, such as October and November, which hover around 26% and 22% respectively. This pattern underscores the challenge of finding sunny days at this time of year, setting realistic expectations for anyone hoping to bask in the elusive Icelandic sun during a September visit.
As summer fades and autumn approaches, September in Reykjanesbaer, Iceland, brings a noticeable transition in daylight. After enjoying a glorious 20 hours of sunlight in June, the days gradually shorten, with sunlight reducing to 12 hours by the end of September. This month serves as a bridge, offering a balance between the vibrant long days of summer and the crisp, shorter days of fall ahead. Notably, September sees a decline from August’s 16 hours, signaling the onset of darker evenings. As the year progresses, this trend continues, with October further reducing daylight to 9 hours, reminding inhabitants of the impending winter season. Embracing this shift, Reykjanesbaer becomes a canvas of autumn colors, where each sunset is a gentle farewell to the lingering warmth of summer.
As summer gives way to autumn, September in Reykjanesbær sees a resurgence in wind speed, averaging 7.2 m/s (16 mph)—a notable increase from the gentle breezes of August. This uptick marks a gradual reestablishment of stronger winds as the year progresses, with September’s conditions echoing January and November, which also boast the same wind speed. The month serves as a bridge, transitioning from the milder, calmer days of summer to the more robust gusts that characterize the approaching winter. Unlike the fluctuating winds of the earlier months, this stability in September's wind invites both adventure and contemplation, making it a perfect time for those exploring Iceland's stunning landscapes.
The weather in Reykjanesbaer 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 Reykjanesbaer and find detailed weather information for every month.
September and January present contrasting weather patterns. In September, temperatures range from a minimum of 1°C (34°F) to an average of 9°C (48°F) and a maximum of 13°C (56°F), with a significant amount of rainfall totaling 171 mm (6.7 in) over 21 days, contributing to a high humidity level of 85%. Conversely, January experiences colder conditions, with temperatures dipping to a minimum of -6°C (22°F) and averaging 2°C (36°F), peaking at 9°C (49°F). Precipitation is lower at 117 mm (4.6 in) over 17 days, and the humidity drops slightly to 80%. For more detailed insights into January weather, check Reykjanesbaer weather in January.
September and February in Reykjanesbaer present contrasting weather conditions. September experiences milder temperatures, with averages around 9°C (48°F), whereas February sees colder conditions, averaging only 2°C (36°F), and dipping as low as -9°C (16°F). Precipitation is also notable in both months, with September receiving 171 mm (6.7 in) over 21 days, while February records 126 mm (5.0 in) across 19 days. Additionally, September is characterized by higher humidity levels at 85% compared to February's 77%. For more details on February weather, you can visit Reykjanesbaer weather in February.
September and March present notable contrasts in weather conditions. In September, temperatures range from a minimum of 1°C (34°F) to a maximum of 13°C (56°F), with an average around 9°C (48°F). The month sees substantial precipitation, totaling 171 mm (6.7 in) over 21 days, and a high humidity level of 85%. In comparison, March experiences colder temperatures, dipping to a minimum of -6°C (21°F) and reaching an average of 2°C (37°F) with a max of 8°C (47°F). Precipitation amounts to 110 mm (4.3 in) across 18 days, while humidity remains slightly lower at 82%. For further details, you can check Reykjanesbaer weather in March.
When comparing the weather in September and April, notable differences arise in temperature and precipitation. September typically offers milder temperatures, with an average of 9°C (48°F), while April's average is cooler at 5°C (41°F). Additionally, September experiences more rainfall, accumulating 171 mm (6.7 in) over 21 days, compared to April's 133 mm (5.2 in) spread over 18 days. Humidity levels are slightly higher in September at 85%, while April maintains a lower humidity of 80%. For more insights on April weather, you can explore Reykjanesbaer weather in April.
In comparing the weather in September and May, both months display relatively cool temperatures, but September tends to be slightly warmer, with average temperatures ranging from 1°C to 13°C (34°F to 56°F) compared to May's range of 0°C to 12°C (33°F to 54°F). Precipitation is more pronounced in September, with 171 mm (6.7 in) over 21 days, while May experiences less rain at 115 mm (4.5 in) across 16 days. Despite the differences in rainfall and temperature, both months maintain high humidity levels of 85%. For a closer look at May weather conditions, you can visit Reykjanesbaer weather in May.
In comparing the weather of September to that of June, both months experience similar average temperatures around 9°C (48°F) but showcase distinct differences in their climatic conditions. September tends to be cooler at its minimum, dipping to 1°C (34°F), while June has a slightly higher minimum of 4°C (39°F). Precipitation levels also vary significantly: September receives 171 mm (6.7 in) across 21 rainy days, making it considerably wetter than June, which sees only 87 mm (3.4 in) across 15 rainy days. Both months share a high humidity level of 85%, contributing to a generally damp feel, but it’s clear that June offers a more pleasant experience overall. For more insights into the weather during this time, you can check Reykjanesbaer weather in June.
The weather in September is considerably cooler than in July, with average temperatures dropping to 9°C (48°F) compared to July's 11°C (52°F). In September, the minimum temperature can plummet to 1°C (34°F), while July experiences milder lows at 6°C (43°F). Additionally, September sees significantly higher precipitation, totaling 171 mm (6.7 in) over 21 days, contrasted with July's 78 mm (3.1 in) over 18 days. Humidity levels are relatively similar, with September at 85% and July at 87%. For a more detailed comparison, check out Reykjanesbaer weather in July.
In comparison, the weather in September is notably cooler than in August, with temperatures ranging from a low of 1°C (34°F) to a high of 13°C (56°F), while August experiences milder temperatures between 7°C (45°F) and 16°C (62°F). Additionally, September sees a significant increase in precipitation, totaling 171 mm (6.7 in) over 21 days, compared to August's 89 mm (3.5 in) over just 13 days. Humidity levels remain relatively high in both months, with September at 85% and August slightly higher at 88%. For more details about the conditions in August, you can visit Reykjanesbaer weather in August.
In comparing the weather between September and October, we observe a slight drop in temperatures, with October recording a minimum temperature of -1°C (30°F) compared to September's minimum of 1°C (34°F). The average temperature also decreases from 9°C (48°F) in September to 6°C (44°F) in October, while the maximum temperature remains relatively stable at 13°C (56°F) for September and 12°C (53°F) for October. Precipitation levels are lower in October, with 119 mm (4.7 in) over 18 days, compared to September's 171 mm (6.7 in) over 21 days. Despite these changes, humidity remains consistent at 85% in both months. For more detailed information about the weather, you can visit Reykjanesbaer weather in October.
In September, temperatures in Reykjanesbaer generally range from a chilly 1°C (34°F) at night to a moderate 13°C (56°F) during the day, with an average of 9°C (48°F). The month experiences considerable rainfall, with 171 mm (6.7 in) spread over 21 days, contributing to a high humidity level of 85%. In contrast, November brings cooler weather with minimum temperatures dropping to -4°C (25°F) and a maximum of 10°C (51°F), averaging around 4°C (39°F). Precipitation decreases to 119 mm (4.7 in) over 18 days, and humidity slightly lowers to 81%. Overall, November is noticeably colder and less rainy than September, marking a clear transition into the colder months. For more details, check out Reykjanesbaer weather in November.
In comparing the weather of September to December, we see notable differences in temperature and precipitation. September experiences milder temperatures, ranging from a minimum of 1°C (34°F) to a maximum of 13°C (56°F), with an average of 9°C (48°F). It also boasts higher precipitation levels at 171 mm (6.7 in) over 21 days, accompanied by a humidity level of 85%. In contrast, December is colder, with temperatures dipping down to a minimum of -6°C (21°F) and an average of 2°C (37°F). The maximum temperature in December reaches 9°C (49°F), while precipitation is lower at 119 mm (4.7 in) over 18 days, and the humidity is slightly reduced at 80%. For more specific insights into December weather, you can refer to Reykjanesbaer weather in December.
September in Reykjanesbaer marks a notable transition into the cooler embrace of autumn, where temperatures begin to dip and the frequency of rain increases. With the average temperature hovering around 9°C, the month brings a refreshing chill that contrasts sharply with the milder summer months. This period is characterized by a significant uptick in precipitation, with rain gracing the skies on nearly two-thirds of the days, which adds a lush vibrancy to the landscape but also demands an umbrella for those venturing outdoors. The heightened humidity creates a distinctly crisp atmosphere, enhancing the rich colors of the fall foliage. For more insights on the shifting weather patterns in this captivating region, visit Reykjanesbaer Climate.