Last updated: March 17, 2025
Discover the enchanting December weather in Mosfellsbær, Iceland, where temperatures fluctuate dramatically. The average temperature hovers around 0°C (32°F), with highs reaching 10°C (50°F) and plunging to -15°C (5°F). This month is characterized by substantial moisture, with 107 mm (4.2 in) of precipitation over 17 days, contributing to a notably humid climate of 95%. Embrace the crisp, wintry atmosphere as the beautiful Icelandic landscape is transformed by snow and rain, making it a magical time of year.
In December, Mosfellsbaer experiences a chilly yet somewhat moderate winter climate, with temperatures ranging from a minimum of -15°C (5°F) to a maximum of 10°C (50°F). The average temperature hovers around 0°C (32°F), signifying the onset of winter's embrace while staying above freezing during the day. Compared to the preceding months, December exhibits a slight warming trend in daytime highs, as the region transitions from the harsher conditions of November, which saw a minimal temperature drop to -12°C (11°F). The cold is palpable, yet the presence of milder afternoons invites a unique charm to the icy landscapes, making December an enchanting time to experience the beauty of Iceland.
December brings moderate precipitation to Mosfellsbær, Iceland, with an average of 107 mm (4.2 in) over 17 days. This showcases a slight increase compared to the preceding months, particularly November's 105 mm, indicating a steady winter pattern. The winter months generally see higher precipitation, with September standing out with its peak at 162 mm (6.4 in). As the year closes, December maintains a balance between the wetter conditions typical of autumn and the drier, colder January that follows, creating a dynamic transitional phase in this picturesque Icelandic region.
In Mosfellsbaer, Iceland, December marks the beginning of winter with humidity levels hovering around 95%, a slight increase from the preceding month. The trend for the year reveals a gradual decline in humidity from the high peaks of 96% in January to a seasonal low of 81% in June. As the summer months transition into autumn, humidity tends to rise again, culminating in the wetter conditions of late fall and early winter. Thus, December's humidity is consistent with this pattern, reflecting the island's cool, moist climate and setting the stage for the frosty days ahead.
In December, Mosfellsbær experiences a low UV Index of 1, maintaining the same level as seen in the preceding months of November and January. This consistent low exposure means that residents and visitors can enjoy up to 45 minutes in the sun without significant risk of sunburn. Following a notable rise in UV levels during the summer months of June and July, when the index peaked at 6, the trend shifts back to safer levels as winter sets in. Overall, the UV Index remains mild throughout the winter, encouraging outdoor activities while ensuring sun safety is easily manageable. For more details on UV exposure in this charming Icelandic town, check out the Mosfellsbaer UV Index.
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In Mosfellsbær, Iceland, the contrast between the long summer days and the dark winter months is striking, as illustrated by the sun hours throughout the year. While December only brings a mere 24 hours of sunshine, it marks the end of a seasonal decline that starts after the vibrant summer months, with sunlight peaking in May at 334 hours. As the year progresses into autumn, sunshine hours drop significantly, culminating in November's 67 hours. This sharp decrease leads into December's long nights, emphasizing the cozy charm of winter in this picturesque town. Despite the limited sunlight, December's brief hours remind residents and visitors alike of the stark yet beautiful transition of seasons in Iceland, creating an enchanting atmosphere during the darkest days of the year.
In December, Mosfellsbær, Iceland, experiences a relatively modest 17% chance of sunny weather, a slight decline from the previous months. As the year progresses towards winter, the likelihood of encountering clear skies dips, especially compared to the sunnier months of May, when the chance rises to an encouraging 44%. This trend reflects Iceland's characteristic winter climate, where shorter days and increased cloud cover dominate. December's sun probability, while not as bleak as the deeper winter months of January and February, still suggests that visitors should be prepared for a tapestry of gray skies and brisk weather rather than bright, sunny days.
In Mosfellsbær, Iceland, the daylight duration undergoes a dramatic transformation throughout the year, peaking in the summer months and dwindling significantly as winter approaches. Starting with a mere 4 hours of daylight in December, the winter solstice marks the year's shortest day, setting a stark contrast to the vibrant 20 hours of daylight experienced in June. As the seasons shift, daylight gradually increases from January's 5 hours, culminating in April when sunlight stretches to 15 hours. This trend continues into the lush days of May and June, where the extended daylight fosters a sense of vitality. Conversely, as autumn settles in, daylight gradually recedes, dropping to 9 hours in October and dwindling to 6 hours by November. This cyclical pattern of daylight serves not only to define the rhythm of life in Mosfellsbær but also highlights Iceland's unique seasonal contrasts, creating a landscape where the interplay of light and darkness paints the narrative of each passing month.
As December arrives in Mosfellsbær, Iceland, the wind begins to whisper its cool, gentle tones, with an average speed of 3.3 m/s (7 mph). This marks a subtle decline from the slightly brisker winds of autumn, with November recording 3.4 m/s. Reflecting a broader trend throughout the year, winter months generally experience milder winds compared to the peak breezes of early fall, particularly September’s robust 4.0 m/s. Interestingly, while December's winds are softer, they still carry the crisp promise of Iceland's stunning winter landscape, inviting locals and explorers alike to embrace the serene beauty that this time of year brings.
The weather in Mosfellsbaer 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 Mosfellsbaer and find detailed weather information for every month.
December and January exhibit similar cold conditions, but January tends to be slightly colder overall. In December, temperatures range from a minimum of -15°C (5°F) to a maximum of 10°C (50°F), with an average temperature of 0°C (32°F). In comparison, January experiences even lower temperatures, with a minimum of -16°C (3°F) and an average of -1°C (30°F), while still reaching a maximum of 10°C. Both months see significant precipitation, with December recording 107 mm over 17 days and January slightly higher at 118 mm over 16 days. Humidity remains high in both months, averaging 95% in December and 96% in January, contributing to the chilly atmosphere. For a more detailed look at the weather specifics, you can refer to Mosfellsbaer weather in January.
December and February both experience cold temperatures, but February tends to be slightly chillier overall. In December, temperatures range from a minimum of -15°C (5°F) to a maximum of 10°C (50°F), with an average of 0°C (32°F). On the other hand, February sees even lower temperatures, with a minimum of -22°C (-7°F) and an average of -1°C (31°F), despite having similar maximum temperatures of 8°C (47°F). Precipitation is slightly higher in February, totaling 131 mm (5.1 in) compared to December's 107 mm (4.2 in), with both months seeing rainfall on about 17 days. Remarkably, humidity remains constant at 95% for both months, contributing to the overall wintry feel. For a more detailed look at February weather, check out Mosfellsbaer weather in February.
December and March share some similarities in weather, yet they also exhibit notable differences. Both months experience chilly temperatures, with December having a minimum of -15°C (5°F), an average of 0°C (32°F), and a maximum of 10°C (50°F). In contrast, March sees slightly milder conditions with a minimum of -15°C (5°F), an average of 1°C (33°F), and a maximum of 9°C (49°F). Precipitation levels remain comparable, with December receiving 107 mm (4.2 in) and March just slightly less at 106 mm (4.2 in), both over 17 days. Humidity is also quite high, with December at 95% and March slightly lower at 94%. For a more detailed look at the weather conditions, you can check out Mosfellsbaer weather in March.
December and April present contrasting weather patterns, showcasing the transition from winter to spring. In December, temperatures can drop to a chilling -15°C (5°F) at night, with an average of 0°C (32°F) and daytime highs reaching 10°C (50°F). The month experiences significant precipitation, totaling 107 mm (4.2 in) over 17 days, alongside high humidity levels of 95%. In contrast, April brings milder conditions, with temperatures ranging from a minimum of -10°C (15°F) to an average of 4°C (39°F) and highs of 14°C (58°F). Precipitation increases slightly to 123 mm (4.8 in) over the same number of rainy days, while humidity decreases to 87%. For more details on the weather specifics, check out Mosfellsbaer weather in April.
December and May weather displays significant contrasts in temperature and humidity. In December, temperatures can plunge as low as -15°C (5°F), with an average temperature around 0°C (32°F) and highs reaching only up to 10°C (50°F). The month experiences substantial precipitation with 107 mm (4.2 in) spread over 17 days and a high humidity level of 95%. In contrast, May sees milder conditions, where the temperature ranges from a minimum of -4°C (25°F) to a pleasant average of 7°C (44°F), peaking at 16°C (62°F). It also has slightly increased precipitation at 118 mm (4.6 in) over 18 days, but the humidity is lower at 85%. For more details on May weather, you can check out Mosfellsbaer weather in May.
In December, temperatures plunge significantly, with minimums reaching as low as -15°C (5°F) and an average temperature of around 0°C (32°F), while precipitation totals 107 mm (4.2 in) over 17 days. This chilly month is characterized by high humidity levels of 95%, creating a frosty and damp atmosphere. In contrast, June brings milder weather, showcasing a notable rise in temperatures with minimums of 2°C (35°F) and average temperatures of 9°C (49°F), peaking at 20°C (68°F). Although June experiences slightly less precipitation at 94 mm (3.7 in) over 15 days and a lower humidity of 81%, the overall climate is much more pleasant. For a detailed look at the weather in Mosfellsbaer during June, you can refer to Mosfellsbaer weather in June.
The weather in December and July contrasts sharply, reflecting the distinct seasons. December experiences frigid temperatures, with a minimum of -15°C (5°F) and an average of 0°C (32°F), while July boasts much milder conditions, with a minimum of 3°C (38°F) and an average of 11°C (53°F). Precipitation also varies between the two months; December sees 107 mm (4.2 in) over 17 days, compared to July’s 76 mm (3.0 in) spread across 16 days. Additionally, December's humidity reaches a peak of 95%, making it feel even colder, while July's humidity is lower at 86%. For more information on July's weather, check out Mosfellsbaer weather in July.
When comparing the weather in December and August, it's clear that the two months are vastly different. December experiences much colder temperatures, ranging from a minimum of -15°C (5°F) to a maximum of 10°C (50°F), with an average temperature of 0°C (32°F). The humidity is notably high at 95%, and precipitation occurs on about 17 days, totaling 107 mm (4.2 in). In contrast, August offers milder conditions, with temperatures ranging from a minimum of 4°C (39°F) to a maximum of 20°C (69°F) and an average of 11°C (52°F). The humidity is lower at 88%, and while it also sees frequent rain, the total precipitation of 83 mm (3.3 in) over 15 days is less than that of December. For a closer look at August’s weather, you can check Mosfellsbaer weather in August.
December and September exhibit quite distinct weather patterns. In December, temperatures can dip as low as -15°C (5°F), with an average of around 0°C (32°F) and a maximum of 10°C (50°F). This month experiences significant precipitation, totaling 107 mm (4.2 in) over 17 days, coupled with high humidity at 95%. In contrast, September boasts milder temperatures, with a minimum of -3°C (27°F), an average of 8°C (47°F), and a maximum of 16°C (61°F). It also has more rainfall, with 162 mm (6.4 in) spread across 20 days, and a slightly lower humidity level of 92%. To learn more about the specific climate conditions in September, you can visit Mosfellsbaer weather in September.
In comparing December and October weather, December tends to be significantly colder, with average temperatures hovering around 0°C (32°F), compared to October's milder average of 5°C (41°F). The minimum temperature in December can drop to a chilling -15°C (5°F), while in October, it rarely falls below -6°C (22°F). Precipitation levels are also notable, with December receiving 107 mm (4.2 in) over 17 days, compared to October's 94 mm (3.7 in) across 16 days. Humidity remains high in both months, staying at 95% in December and 93% in October. For a more detailed look at the October weather, you can visit Mosfellsbaer weather in October.
December weather tends to be colder than November, with minimum temperatures dropping to -15°C (5°F) compared to November's minimum of -12°C (11°F). While both months have similar average maximum temperatures, December's overall average is lower at 0°C (32°F) versus November's 1°C (34°F). In terms of precipitation, December sees slightly more rainfall at 107 mm (4.2 in) over 17 days, compared to November's 105 mm (4.1 in) over 15 days. Humidity levels are slightly higher in December at 95%, compared to 94% in November. For more detailed insights, you can check Mosfellsbaer weather in November.
As December casts its chilly spell over Mosfellsbær, the weather starkly contrasts with the milder months before. This is the time when the temperature can plunge to a brisk -15°C (5°F), while the average hovers around the freezing point. With significant precipitation amounting to 107 mm (4.2 in) over 17 days, the month is characterized by a whimsical mix of frost and rain, shrouded in clouds and a notably high humidity of 95%. Visitors and locals alike can expect a serene yet moody atmosphere, making it a uniquely beautiful prelude to the winter season. For a deeper understanding of the weather patterns throughout the year, check out the detailed insights at Mosfellsbaer Climate.