Last updated: March 17, 2025
In Selfoss, Iceland, December brings a chill to the air with maximum temperatures reaching around 9°C (49°F) and an average hovering at 0°C (33°F). As the month progresses, night temperatures can dip to a brisk -11°C (12°F). With 137 mm (5.4 in) of precipitation spread over 16 days, the landscape transforms into a winter wonderland, draped in snow and ice. The humidity levels sit at a high 84%, creating a crisp atmosphere that's ideal for enjoying the quiet beauty of Icelandic winter.
In Selfoss, Iceland, December brings a crisp chill to the air as temperatures reflect the deepening winter. With minimums averaging around -11°C (12°F) and a cold average of 0°C (33°F), the month is emblematic of Icelandic winter, offering a stark yet beautiful landscape. Maximums reach about 9°C (49°F), giving a brief respite from the frigid nights. This cold snap continues the trend of steadily declining temperatures from the previous months, where November's mild chill begins to give way to the heart of winter. As December progresses, the stark beauty of ice and snow transforms Selfoss into a winter wonderland, making it an enchanting time for visitors and locals alike to embrace the season.
In December, Selfoss, Iceland, experiences a notable shift towards winter with precipitation averaging 137 mm (5.4 in) over 16 days. This marks a slight decrease from the higher precipitation seen in the preceding months, particularly September, which recorded a significant 194 mm. As winter settles in, December’s precipitation reflects a consistent pattern of dampness typical for the region, maintaining the overall trend of moist conditions throughout the year. With 16 rainy days, the month balances between lingering autumnal drizzles and the onset of winter snows, illustrating the transition in climate as the year draws to a close.
The humidity levels in Selfoss, Iceland, exhibit a notable consistency throughout the year, with December maintaining a relatively high reading of 84%. This trend is typical for the winter months, as humidity tends to hover around the low to mid-80s. From January to March, humidity peaks slightly, hitting 85%, before gradually easing in April to 81%. As summer approaches, humidity ascends again, reaching its peak in July at 86% and August at 87%. Following this summer spike, the humidity remains elevated, averaging around 85-88% into the late fall and early winter months. December's 84% humidity showcases the lingering atmospheric moisture characteristic of Iceland’s winter climate, contributing to its enchanting yet chilly allure.
In December, Selfoss, Iceland experiences a low UV Index of 1, consistent with the trend seen since November. This low level implies minimal risk of harm from unprotected sun exposure, allowing for a generous burn time of 45 minutes for most skin types. Following a seasonal pattern, the UV Index gradually increases from January's low exposure category, peaking at a notable 6 during the summer months of June and July. As winter sets in, the focus shifts back to protective measures, making December an ideal time for outdoor activities without the concern of sunburn. For a deeper look into UV levels throughout the year, visit Selfoss UV Index.
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In Selfoss, Iceland, December brings a stark contrast to the vibrant sunshine of the summer months, as the town experiences only 29 hours of sunlight. Following a gradual decline from the crisp brightness of October, with 142 hours, the days grow increasingly short as winter settles in. This pattern is emblematic of the region, where sunlight peaks in the lush days of May and June, boasting over 330 hours, and then fades to a mere whisper by the close of the year. The shift from the long, sun-drenched days of summer to the dim light of December serves as a reminder of Iceland's unique and captivating seasonal cycles, where each month offers its own distinct charm in the dance of light and shadow.
In Selfoss, Iceland, December's weather ushers in a unique challenge for those seeking sunny skies, with only a 17% chance of sunshine. This reflects a trend seen throughout the colder months, as sunlight becomes increasingly elusive from autumn into winter. Notably, the highest probability of sun occurs in May at 42%, while winter months like January and February are even less promising, dropping to 33% and 15%, respectively. As the year winds down, the lingering cloud cover and shorter days make December one of the cloudiest months, showing that sunlight is a rare gift to behold during this time.
In Selfoss, Iceland, the daylight duration experiences a remarkable transformation throughout the year. Starting with merely 4 hours in December, the days begin to lengthen gradually as winter gives way to spring. By March, residents can enjoy 11 hours of daylight, a significant boost that continues to climb until June reaches its peak with an impressive 20 hours of daylight. The summer months are blissfully bright, but as autumn sets in, daylight begins to wane once again, dropping to 16 hours in August and gradually tapering to 5 hours by January. This rhythmic cycle of light and dark not only shapes the landscape but also influences the lifestyle in Selfoss, where the joy of the long summer days starkly contrasts with the introspective beauty of the winter months.
As December unfolds in Selfoss, Iceland, the average wind speed settles at 3.5 m/s (8 mph), creating a crisp atmosphere that echoes the transition into winter. Notably, this month sees a slight drop from the windy conditions of early autumn, with September peaking at 4.1 m/s (9 mph). Throughout the year, wind speeds exhibit a gentle decline from the early fall months, suggesting a calming shift as layers of frost begin to embrace the landscape. The trend of gradually lowering winds continues into December, hinting at a tranquil season ahead, where the biting chill is met with the serene beauty of Iceland's winter scenes. This subtle shift not only marks the end of the year but also invites a cozy atmosphere perfect for reflection and warmth against the backdrop of nature's breath.
The weather in Selfoss changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of December's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Selfoss and find detailed weather information for every month.
December and January share a similar average temperature of around 0°C (32°F), but January tends to be slightly colder with a minimum temperature dropping to -14°C (7°F) compared to December’s -11°C (12°F). Both months experience significant precipitation, with January slightly edging out December with 142 mm (5.6 in) over 15 days, while December records 137 mm (5.4 in) over 16 days. Humidity levels remain consistent at 84% for both months, creating a damp and chilly atmosphere. For more details about the weather conditions in January, you can check out Selfoss weather in January.
In comparing the weather of December and February, it's noteworthy that December experiences slightly milder temperatures, with a minimum of -11°C (12°F) and a maximum of 9°C (49°F), while February can be harsher, reaching a minimum of -16°C (3°F). Both months have an average temperature around freezing, but February tends to be a bit colder overall. Additionally, February records more precipitation, with 158 mm (6.2 in) over 19 days compared to December's 137 mm (5.4 in) across 16 days, indicating wetter conditions as winter deepens. Humidity levels are similar, with December at 84% and February slightly lower at 82%. For more specific details on February weather, check Selfoss weather in February.
In December, the weather is characterized by milder temperatures, with an average of 0°C (33°F) and maximums reaching 9°C (49°F), while March sees slightly cooler conditions with an average temperature of 1°C (34°F) and a minimum of -15°C (5°F). Precipitation is abundant in both months, with December receiving 137 mm (5.4 in) over 16 days, and March not far behind with 121 mm (4.8 in) across 18 days. Additionally, humidity levels remain high in both months, hovering around 84% in December and 85% in March. For detailed insights on the weather conditions during March, you can refer to Selfoss weather in March.
In December, temperatures typically range from a minimum of -11°C (12°F) to a maximum of 9°C (49°F), with an average around 0°C (33°F). The month experiences significant precipitation, totaling 137 mm (5.4 in) over approximately 16 days, contributing to a relatively high humidity level of 84%. In contrast, April offers slightly milder weather, with temperatures ranging from a minimum of -12°C (11°F) to a maximum of 13°C (56°F) and an average temperature of 4°C (39°F). Although precipitation is slightly higher at 140 mm (5.5 in), it occurs over a few more days (18), resulting in a slightly lower humidity of 81%. For more details on April weather, you can visit Selfoss weather in April.
December and May present stark contrasts in weather conditions. In December, temperatures can dip as low as -11°C (12°F) with an average around 0°C (33°F), while reaching a maximum of 9°C (49°F). The month experiences considerable precipitation, totaling 137 mm (5.4 in) over 16 days, and the humidity remains high at 84%. In comparison, May sees milder temperatures with a minimum of -3°C (27°F), an average of 7°C (44°F), and a maximum of 16°C (61°F). Precipitation in May is slightly lower at 128 mm (5.0 in), occurring over 18 days, and humidity is also a touch lower at 83%. For more detailed insights on weather during this month, check out Selfoss weather in May.
December and June present stark contrasts in weather conditions. In December, temperatures can dip as low as -11°C (12°F), with an average of 0°C (33°F) and a maximum of only 9°C (49°F). The month is characterized by significant precipitation, totaling 137 mm (5.4 in) over 16 days, accompanied by high humidity at 84%. In contrast, June brings milder conditions, starting at a minimum of 2°C (37°F) and reaching an average of 9°C (49°F), peaking at 19°C (67°F). With a total precipitation of 89 mm (3.5 in) over just 15 days, June maintains a slightly lower humidity level of 82%. For more detailed insights, you can check Selfoss weather in June.
December and July present stark contrasts in weather. In December, temperatures can drop as low as -11°C (12°F), with an average of 0°C (33°F) and a maximum of 9°C (49°F). This month also sees considerable precipitation, measuring 137 mm (5.4 in) over 16 days, alongside high humidity levels of 84%. Conversely, July experiences notably milder conditions, with temperatures ranging from a minimum of 4°C (39°F) to a maximum of 24°C (76°F), averaging 11°C (53°F). Precipitation in July is lower at 86 mm (3.4 in), occurring over 15 days, while humidity remains steady at 86%. For more details on July weather, you can refer to Selfoss weather in July.
In December, temperatures can plunge to a chilling minimum of -11°C (12°F) and only rise to an average of 0°C (33°F), with a maximum of 9°C (49°F). The weather is often damp, with significant precipitation totaling 137 mm (5.4 in) over 16 days, contributing to the high humidity of 84%. In contrast, August offers a much milder climate, with minimum temperatures around 5°C (41°F) and an average of 11°C (52°F), peaking at 19°C (66°F). This month experiences less precipitation at 96 mm (3.8 in) over 13 days and a slightly higher humidity of 87%. For more detailed insights into the weather during this summer month, check Selfoss weather in August.
December weather is characterized by colder temperatures, with minimums dropping to -11°C (12°F) and an average of 0°C (33°F), while September enjoys a milder climate with minimums around -2°C (29°F) and an average of 8°C (47°F). Precipitation levels are notable in both months, with December receiving 137 mm (5.4 in) over 16 days, compared to September's 194 mm (7.7 in) across 21 days, indicating a wetter month for September. Humidity remains high in both months, with December at 84% and September slightly higher at 87%. For a detailed view of weather patterns during this transitional period, visit Selfoss weather in September.
December weather in Selfoss is significantly colder than in October, with average temperatures hovering around 0°C (33°F), while October enjoys a milder average of 5°C (42°F). The minimum temperatures in December can plunge to a frigid -11°C (12°F), compared to -5°C (23°F) in October. Although both months experience precipitation on about 16 days, December sees a higher total with 137 mm (5.4 in) compared to October's 113 mm (4.4 in). Additionally, December's humidity level is slightly lower at 84% compared to October's 88%. For more detailed information on October weather, visit Selfoss weather in October.
In comparing the weather of December and November, December generally experiences colder temperatures, with a minimum of -11°C (12°F) and an average of 0°C (33°F), while November has slightly milder conditions, ranging from a minimum of -8°C (17°F) to an average of 2°C (35°F). Additionally, December sees more precipitation, with a total of 137 mm (5.4 in) over 16 days, compared to November's 128 mm (5.0 in) across 15 days. Humidity levels remain quite similar, with December at 84% and November slightly higher at 85%. For more details on November’s weather, visit Selfoss weather in November.
As December descends upon Selfoss, the weather takes on a distinctive chill that sets it apart from other months. With temperatures plummeting to a minimum of -11°C (12°F), the average dips to 0°C (33°F), creating a stark contrast to the milder months of autumn. This month also sees an increase in precipitation, with rain and snow combining for a total of 137 mm (5.4 in) over 16 days, leading to a heightened sense of winter's embrace. The high humidity at 84% underscores the cold, making the atmosphere feel even brisker. For a deeper insight into the year-round conditions, visit Selfoss Climate.