Last updated: March 17, 2025
In September, Hveragerdi, Iceland, experiences a distinct shift as autumn takes hold. With maximum temperatures reaching 16°C (61°F) and average conditions around 8°C (47°F), the landscape transforms under cooler skies. Nighttime lows can dip to a brisk -2°C (29°F), making warm layers essential for evening outings. This month also brings significant rainfall, amassing 188 mm (7.4 in) over 21 days, resulting in heightened humidity levels averaging around 87%. The combination of chill and moisture creates a lush environment, perfect for enjoying Hveragerdi's renowned geothermal features and vibrant natural surroundings.
In Hveragerdi, Iceland, September marks the transition into autumn, with temperatures reflecting this seasonal shift. On average, temperatures range from a chilly -2°C (29°F) at night to a comfortable 16°C (61°F) during the day, providing a pleasant mix ideal for outdoor exploration. As days shorten and the warmth of summer fades, September's average of 8°C (47°F) is a gentle reminder of the coming colder months, yet still significantly milder than the depths of winter. This month's temperatures herald a gradual drop leading into October, underscoring a steady cooling trend as Hveragerdi prepares for its chilly, scenic winter days.
In September, Hveragerdi, Iceland experiences a notable surge in precipitation, with an average of 188 mm (7.4 in), making it the wettest month of the year. This uptick corresponds with 21 rainy days, marking a significant increase from the drier summer months of June and July. As fall sets in, the amount of rain not only exceeds the monthly averages of the preceding months but also highlights a shift in seasonal weather patterns. This transition into more humid and wetter conditions is characteristic of the region, setting the stage for the cooler, crisp days ahead. The combination of increased rainfall and frequency of precipitation days underscores the dynamic climate of Hveragerdi during this time of year.
In September, Hveragerdi experiences a notable consistency in humidity, maintaining a level of 87%, which echoes the heightened moisture levels seen in the preceding months of August and July. This trend suggests a sustained embrace of the lush, vibrant atmosphere characteristic of the region as summer transitions to fall. While the humidity peaks this month, it gradually builds from the more variable levels earlier in the year, such as 81% in April and 82% in June. As October approaches, Hveragerdi is poised to experience a slight increase in humidity, yet September holds a special place with its balance of warmth and moisture, creating an enchanting environment as the foliage begins to change.
In September, Hveragerdi, Iceland, experiences a gradual transition in its UV Index, registering a moderate level of 3. This indicates a slight decrease from the peak summer months of June and July, where the index reached a high of 6. As the days shorten and temperatures begin to cool, residents and visitors should be aware that the burn time remains at 30 minutes, urging a mindful approach to sun exposure. While the UV Index is manageable, it's always wise to stay informed. For more detailed information, visit the Hveragerdi UV Index page.
UV Risk Categories
In Hveragerdi, Iceland, September offers a delightful transition into autumn, showcasing approximately 194 hours of sunshine—a notable dip from the vibrant summer months but still a significant amount of daylight. As the year progresses, sunshine hours trend upwards from a low of just 39 hours in January, steadily rising to a peak in May with 334 hours. The summer months maintain plentiful sunshine, with June and July also basking in over 300 hours. However, as September rolls in, daylight begins to wane, hinting at the long, darker days of winter ahead, yet still providing enough warmth and light to embrace the changing season. This gradual decline continues through October, before plummeting in the last few months of the year, where the stark contrast serves as a reminder of the enchanting yet challenging Icelandic winters.
In Hveragerdi, Iceland, the likelihood of sunny weather peaks in May with a 41% chance, gradually tapering down as summer gives way to autumn. By the time September arrives, residents and visitors can expect only a 13% chance of sunshine, a figure that reflects the month’s transition from the vibrant warmth of summer to the cooler embrace of fall. This decline, alongside similarly low probabilities in July and August, suggests that while Hveragerdi is charming year-round, September is not particularly known for its sunny days. Instead, travelers should prepare for the serene yet overcast ambiance that often defines this time of year.
As summer fades into autumn in Hveragerði, Iceland, September marks a transition from extended daylight to shorter days. With 12 hours of daylight, the month showcases a vibrant balance, offering visitors a generous opportunity to embrace the waning warmth and beauty of the season. While June and July bask in almost 20 hours of sunlight, September signifies the gradual decline, yet still allows for plenty of exploration and adventure. This trend continues into October, where daylight is reduced to 9 hours, emphasizing the fleeting nature of summer. As the months progress towards winter, the increasingly shorter days invite a cozy atmosphere, perfect for reflecting on the rich, expansive daylight of the warmer months.
As summer gracefully transitions into autumn, September winds in Hveragerdi, Iceland, pick up their pace, boasting an average speed of 4.2 m/s (9 mph). This gentle increase from the sleepy summer months, where winds dipped to a calm 2.8 m/s (6 mph) in August, ushers in a refreshing breath of change. It's a reminder of nature's cycles, as the winds stay relatively mild yet invigorate the landscape. The fluctuations experienced throughout the year reveal a trend of gradually increasing wind speeds as the seasons shift, with September standing out as a pivotal moment that hints at the brisk conditions of October and beyond. This shift not only enhances the beauty of the surrounding vistas but also invigorates the spirit of those who embrace the outdoors during this enchanting time of year.
The weather in Hveragerdi 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 Hveragerdi and find detailed weather information for every month.
September and January present stark contrasts in weather conditions. In September, temperatures range from a minimum of -2°C (29°F) to a maximum of 16°C (61°F), with an average of 8°C (47°F). This month experiences significant precipitation, totaling 188 mm (7.4 inches) spread over 21 days, and a high humidity level of 87%. In contrast, January is marked by much colder temperatures, with a minimum of -14°C (7°F), an average of -1°C (31°F), and a maximum of 9°C (49°F). Precipitation is generally lower in January at 136 mm (5.4 inches) over 15 days, accompanied by a similar humidity level of 84%. For more specific weather insights, you can check Hveragerdi weather in January.
September and February exhibit stark contrasts in weather conditions. In September, temperatures range from a chilly -2°C (29°F) to a comfortable max of 16°C (61°F), with an average of 8°C (47°F). The month sees considerable precipitation, totaling 188 mm (7.4 in) over 21 days, alongside a high humidity level of 87%. In contrast, February brings much colder temperatures, with a minimum of -18°C (-1°F) and an average of 0°C (32°F), peaking at 8°C (47°F). Although precipitation is slightly less at 154 mm (6.1 in) over 19 days, the humidity remains relatively high at 82%. For more specific details about February weather, you can refer to Hveragerdi weather in February.
September weather in Hveragerdi typically features milder temperatures, with averages around 8°C (47°F) and maximums reaching 16°C (61°F). In contrast, March is significantly colder, with daily averages plummeting to around 1°C (34°F) and maximums peaking at only 9°C (49°F). While September experiences more precipitation, totaling 188 mm (7.4 in) over 21 days, March has a lower total of 119 mm (4.7 in) across 18 days. Humidity levels between the two months are somewhat comparable, with September at 87% and March slightly lower at 85%. For more information on March weather conditions, you can check Hveragerdi weather in March.
When comparing the weather in September and April, several notable differences emerge. September experiences milder temperatures, with an average of 8°C (47°F) and a maximum of 16°C (61°F), whereas April is generally cooler, averaging 4°C (39°F) and reaching a maximum of 13°C (56°F). Precipitation levels are higher in September, with 188 mm (7.4 in) over 21 days, compared to April's 145 mm (5.7 in) across 18 days. Additionally, September has a slightly higher humidity level at 87%, while April sits at 81%. For more specific details on April conditions, you can refer to the following link: Hveragerdi weather in April.
In comparing the weather between September and May, we see that both months experience similar maximum temperatures, peaking around 16°C (60°F). However, September tends to be slightly warmer on average at 8°C (47°F), while May has a lower average of 6°C (44°F). Interestingly, May records a slightly colder minimum temperature of -3°C (27°F) compared to September's -2°C (29°F). When it comes to precipitation, September is noticeably wetter, with 188 mm (7.4 in) of rain over 21 days, whereas May sees only 134 mm (5.3 in) over 18 days. The humidity levels are also comparable, with September at 87% and May at 83%. For more detailed insights on the weather in May, you can check Hveragerdi weather in May.
September weather is generally cooler and wetter than June, with average temperatures ranging from a minimum of -2°C (29°F) to a maximum of 16°C (61°F). In contrast, June typically has slightly milder temperatures, with lows around 2°C (36°F) and highs reaching 18°C (65°F). Precipitation is more frequent in September, with rainfall occurring on 21 days and totaling 188 mm (7.4 in), compared to 97 mm (3.8 in) over 15 days in June. Humidity levels are also higher in September at 87%, compared to 82% in June, making September feel markedly more humid despite its cooler temperatures. For a detailed look at June’s weather in Hveragerdi, check this link: Hveragerdi weather in June.
In comparing the weather of September and July, September presents cooler temperatures, with an average of 8°C (47°F) and a maximum of 16°C (61°F), compared to July's warmer average of 11°C (53°F) and maximum of 24°C (76°F). Moreover, September experiences significantly higher precipitation at 188 mm (7.4 in) over 21 days, while July sees only 88 mm (3.5 in) across 16 days. Humidity levels remain quite similar, with September at 87% and July slightly lower at 86%. For more detailed information on July weather, you can check out Hveragerdi weather in July.
In comparing the weather between August and September, we see a notable shift towards cooler temperatures in September, with minimums dropping to -2°C (29°F) compared to August's 4°C (40°F). The average temperature in September is 8°C (47°F), which is significantly lower than August’s average of 11°C (52°F). Maximum temperatures also decrease, reaching only 16°C (61°F) in September versus 19°C (66°F) in August. Additionally, September experiences considerably more rainfall, with a total precipitation of 188 mm (7.4 in) over 21 days, compared to August's 99 mm (3.9 in) over 14 days. Despite similar humidity levels at 87% for both months, September's wetter conditions and cooler temperatures mark a clear transition into autumn. For a more detailed look into August, you can visit Hveragerdi weather in August.
September and October present a noticeable shift in weather conditions. In September, temperatures range from a minimum of -2°C (29°F) to a maximum of 16°C (61°F), with an average temperature of 8°C (47°F). This month sees substantial precipitation at 188 mm (7.4 in) over 21 days, accompanied by high humidity levels of 87%.
In contrast, October brings cooler temperatures, with a minimum of -6°C (22°F), an average of 5°C (41°F), and a maximum of 12°C (54°F). Although average temperatures drop, October experiences less rainfall, totaling 114 mm (4.5 in) over 16 days, and a slightly increased humidity level of 88%. For more details on October weather specifics, you can check Hveragerdi weather in October.
September and November display contrasting weather patterns as the seasons shift. In September, temperatures range from a minimum of -2°C (29°F) to a maximum of 16°C (61°F), with an average of 8°C (47°F). This month experiences considerable rainfall, accumulating 188 mm (7.4 in) over 21 days, accompanied by high humidity levels at 87%. In contrast, November sees colder temperatures, with a minimum of -9°C (17°F) and an average of just 1°C (35°F), peaking at 11°C (52°F). Precipitation is lower at 124 mm (4.9 in) over 15 days, and humidity remains somewhat stable at 85%. For more information, you can visit Hveragerdi weather in November.
In September, temperatures in Hveragerdi range from a chilly -2°C (29°F) to a mild 16°C (61°F), with an average of 8°C (47°F). The month is quite wet, with substantial precipitation of 188 mm (7.4 in) over 21 days and high humidity at 87%. In contrast, December brings colder conditions, with temperatures falling between -11°C (12°F) and a maximum of 9°C (49°F), resulting in a frigid average of 0°C (32°F). Precipitation decreases to 131 mm (5.2 in) spread over 17 days, and humidity slightly drops to 84%. For a deeper understanding of the December climate, you can read more about Hveragerdi weather in December.
As September rolls into Hveragerdi, the weather shifts noticeably, stepping away from the warmer summer months. Temperatures begin to dip, with an average chill that encourages cozy layers and hot beverages. The increased precipitation, with rain gracing the area on more than two-thirds of the month, highlights the transition to autumn, fostering lush landscapes amidst the cooler air. Additionally, the high humidity, averaging around 87%, contributes to a brisk, refreshing atmosphere that invigorates your senses. This blend of cooler temperatures and frequent rain sets September apart, making it a unique time to experience the evolving beauty of Hveragerdi. For a deeper dive into what to expect throughout the year, check out Hveragerdi Climate.