December Weather in Grand Marais, United States

Last updated: February 24, 2025

In December, Grand Marais, United States, experiences a winter wonderland characterized by chilly temperatures and significant humidity. The average temperature hovers around -6°C (21°F), with maximum highs reaching 9°C (48°F) and plunging to a frigid -27°C (-16°F) at times. This month also sees about 63 mm (2.5 in) of precipitation spread over 10 days, resulting in a damp atmosphere with an impressive 91% humidity. Whether you're looking to embrace the crisp air or enjoy winter sports, December in Grand Marais offers a unique and enchanting seasonal experience.

December Temperature in Grand Marais

December in Grand Marais, United States, ushers in the heart of winter with frigid temperatures that set the stage for picturesque snowy landscapes. With a minimum temperature of -27°C (-16°F), this month is marked by a stark chill, while the average temperature hovers around -6°C (21°F). Residents experience a moderate maximum of 9°C (48°F), but even the warmer days don’t escape the unmistakable winter feel. As the year draws to a close, the biting cold is a reminder of the extreme climate fluctuations seen throughout the seasons, particularly in comparison to the milder early months like May and June. December’s chilly embrace encapsulates the rugged beauty of the region, providing both challenges and enchanting winter scenes.

December Weather in Grand Marais: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Grand Marais, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec151426344452606256453121
Data source: Temperature data for Grand Marais generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Grand Marais

In December, Grand Marais experiences 63 mm (2.5 inches) of precipitation over an average of 10 days, signaling a notable shift as winter settles in. This amount fits within a broader trend of increasing precipitation during the late fall months, with November's 54 mm (2.1 inches) preceding it. December's totals are consistent with earlier colder months, yet they still contribute to the year's overall precipitation, which peaks in late summer and early fall. As the year wraps up, the steady rainfall transforms the landscape while hinting at the upcoming snowfall, leaving residents and visitors to embrace the tranquil charm of winter in this lakeside haven.

December Precipitation Trends in Grand Marais

The chart displays monthly precipitation patterns in Grand Marais, with values for each month alongside December's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec33404267676963781031025563
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Grand Marais

In December, Grand Marais experiences a notable shift in humidity, with levels averaging 91%. As the year progresses, humidity begins high in the winter months, peaking at 93% in both January and February before gradually declining toward spring. The transition to drier conditions continues through the summer, with July seeing the lowest average at 70%. However, as autumn approaches, humidity begins to rise once again, reaching 87% in November. This trend suggests a cyclical pattern where winter months are consistently humid, contributing to the overall charm of this lakeside community, especially as it envelops the town in a serene, misty atmosphere.

December Average Humidity in Grand Marais

This chart illustrates the average monthly humidity levels in Grand Marais, with December's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how December's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec93%93%89%85%76%71%70%71%73%82%88%91%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Grand Marais

In December, Grand Marais experiences a significant dip in the UV Index, registering at only 1, which falls into the low exposure category. This notable decrease reflects the shifting seasons, with burn times extending to a comfortable 45 minutes before sun exposure becomes concerning. As the year transitions from the highs of summer with UV indexes peaking at 9 in June and July, winter brings a more cautious approach to sun safety. During this month, outdoor enthusiasts can enjoy their time with minimal worry about UV-related risks. For those planning activities, it's reassuring to know that the rays are at their weakest. Stay informed and protect your skin by visiting Grand Marais UV Index.

Maximum UV Index Levels in Grand Marais for December

The chart shows the monthly maximum UV Index (UVI) for Grand Marais in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec245689987521
Data source: Grand Marais December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

December Sunshine in Grand Marais

In Grand Marais, December brings a gentle decline in sunshine, with 136 hours illuminating the winter days. While this is considerably less than the sun-drenched July, which boasts a remarkable 357 hours, the charm of December lies in its serene winterscapes and cozy atmospheres. The gradual decrease in daylight from the bustling summer months—where May and June shine with over 300 hours—culminates in the quiet beauty of late fall. As nature rests and prepares for spring, visitors can embrace the tranquility that accompanies the shorter days, making each ray of sunshine in December feel like a precious gift.

Monthly Sunshine Duration in Grand Marais: December Highlighted

The December sunshine duration represents the total number of hours Grand Marais experiences direct sunlight during the month of December, excluding cloudy or obstructed periods. This chart compares the sunshine duration of December with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec114h195h254h254h309h347h357h320h253h187h147h136h
Data source: Grand Marais December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Grand Marais During December

In December, Grand Marais, United States, experiences a notable decline in the likelihood of sunny weather, with a mere 17% chance of sunshine. This marks the lowest point of the year, following a gradual decrease from the summer months, when the sun was more frequently seen. Notably, the transition from late fall to winter is marked by diminishing daylight and increased cloud cover, with November showing a slightly higher 32% chance of sun. Overall, as the year progresses, the trend clearly indicates that visitors should be prepared for more overcast and wintry conditions in December, making those rare sunny days all the more special.

Percentage of Sunny Days in December in Grand Marais

The chart illustrates the percentage of sunny days in Grand Marais throughout the year, with December highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Grand Marais experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec26%25%45%33%44%44%64%56%49%31%32%17%
Data source: Grand Marais December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Grand Marais in December

In Grand Marais, United States, December marks the return of shorter days, with daylight duration tapering to a mere 8 hours. This trend mirrors the gradual decline in daylight we see from the long, sun-drenched days of summer, where June, July, and August bask in 15 hours of sunlight. As autumn descends, the days progressively shorten, with November providing only 9 hours before December's stark drop. The unmistakable rhythm of the seasons paints a picture of nature's ebb and flow, reminding us that even as daylight wanes, the beauty of winter nights brings its own kind of magic.

Average Daylight Hours in Grand Marais for December

The chart illustrates the variation in daylight duration in Grand Marais throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 53m10h 15m11h 56m13h 40m15h 10m15h 55m15h 30m14h 10m12h 30m10h 46m9h 15m8h 27m
Data source: Grand Marais daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Grand Marais

As December unfolds in Grand Marais, the wind picks up, reaching an average speed of 6.0 m/s (13 mph)—the highest of the year. This brisk increase signals a shift from the milder breezes of summer, which hovered around 3.3 m/s (7 mph) in July, to the more robust gusts of late autumn. Notably, November already marked a jump to 5.7 m/s (13 mph), indicating a trend towards stronger winds as winter approaches. December's winds, which often whistle across the shores and through the pines, evoke the enchanting chill of the season, reminding residents and visitors alike of the fierce beauty that characterizes this coastal gem in the heart of winter. The steady increase from early fall to winter emphasizes Grand Marais' transformation, where the winds not only announce the changing seasons but also energize the scenic winter landscape.

Average December Wind Speed in Grand Marais

The chart displays monthly wind speed patterns in Grand Marais, with values for each month shown alongside December's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how December's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec4.85.15.24.53.73.43.34.44.04.35.76.0 m/s
Data source: Grand Marais December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Grand Marais Compares to Other Months

The weather in Grand Marais 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 Grand Marais and find detailed weather information for every month.

In comparing the weather between December and January, January generally experiences slightly colder temperatures, with an average of -9°C (15°F) compared to December’s -6°C (21°F). The minimum temperatures drop to -28°C (-19°F) in January, while December sees a milder low of -27°C (-16°F). Precipitation is also reduced in January, with only 33 mm (1.3 in) over 7 days, compared to December’s 63 mm (2.5 in) across 10 days. Humidity remains high in both months, with January at 93% and December at 91%. For more detailed information on January conditions, check out Grand Marais weather in January.

In comparing the weather between December and February, December typically experiences milder temperatures, with an average of -6°C (21°F) compared to February's colder average of -10°C (14°F). December also has a slightly higher maximum temperature of 9°C (48°F), while February peaks at 7°C (44°F). Precipitation is more common in December, with 63 mm (2.5 in) falling over about 10 days, versus February's 40 mm (1.6 in) over 9 days. Both months have high humidity, though February's levels are marginally higher at 93%. For more detailed information, you can check Grand Marais weather in February.

In December, temperatures in Grand Marais range from a chilling minimum of -27°C (-16°F) to a maximum of 9°C (48°F), with an average of -6°C (21°F). The month typically experiences around 63 mm (2.5 in) of precipitation over about 10 days, coupled with high humidity at 91%. In contrast, March shows a slight warming trend, with temperatures dipping from a minimum of -23°C (-10°F) to a maximum of 8°C (47°F), averaging -4°C (26°F). Precipitation decreases significantly to 42 mm (1.6 in) over just 6 days, and humidity hovers around 89%. For a deeper look into March conditions, check out Grand Marais weather in March.

December and April present distinct contrasts in weather, reflecting the transition from winter to spring. In December, temperatures can plunge to a minimum of -27°C (-16°F), with an average around -6°C (21°F) and a maximum of 9°C (48°F). This month also sees significant humidity at 91% and approximately 63 mm (2.5 in) of precipitation over 10 days, typically in the form of snow. In contrast, April brings milder conditions with minimum temperatures of -11°C (12°F) and an average of 1°C (34°F), peaking at 12°C (54°F). Precipitation remains similar at 67 mm (2.6 in) over just 9 days, but the humidity drops to 85%. For a detailed look at what to expect in April, check the full forecast here: Grand Marais weather in April.

In December, the weather is characterized by frigid temperatures, with a minimum of -27°C (-16°F) and an average of -6°C (21°F), while the maximum reaches a mild 9°C (48°F). The month sees substantial humidity at 91% and experiences about 63 mm (2.5 in) of precipitation over 10 days. In contrast, May offers a more temperate climate, with temperatures ranging from a minimum of -4°C (26°F) to an average of 7°C (44°F), and peaking at 17°C (63°F). Although precipitation slightly increases to 67 mm (2.6 in) over the same number of days, the humidity drops to a more comfortable 76%. For more details on May conditions, check out Grand Marais weather in May.

December and June exhibit contrasting weather patterns, showcasing the dramatic seasonal shifts. In December, temperatures can plummet as low as -27°C (-16°F), with an average of -6°C (21°F) and a maximum reaching 9°C (48°F). The month is characterized by higher humidity at 91% and approximately 63 mm (2.5 inches) of precipitation over 10 days. In stark contrast, June welcomes milder temperatures, ranging from a minimum of 3°C (37°F) to an average of 11°C (53°F), and peaking at 21°C (71°F). Though June has slightly more precipitation at 69 mm (2.7 inches) over 11 days, the significantly lower humidity at 71% contributes to a more comfortable atmosphere. For those curious about June's weather specifics, check out Grand Marais weather in June.

December and July present starkly contrasting weather conditions. In December, temperatures plunge dramatically, with an average of -6°C (21°F) and lows reaching as low as -27°C (-16°F), making it one of the coldest months of the year. The month is characterized by high humidity at 91% and about 63 mm (2.5 in) of precipitation over approximately 10 days, creating a chilly and often damp environment.

In contrast, July offers a much warmer climate, with average temperatures around 16°C (60°F) and highs reaching 25°C (77°F). The humidity is significantly lower at 70%, and while the total precipitation remains the same at 63 mm (2.5 in), it occurs over just 8 days, leading to more pleasant conditions suitable for outdoor activities. For more insights on summer weather, you can check Grand Marais weather in July.

December and August present starkly contrasting weather experiences. December is characterized by frigid temperatures, with average lows dropping to -6°C (21°F) and a chilling minimum of -27°C (-16°F), making it a month where winter dominates. Precipitation occurs over 10 days, contributing to the crisp air and high humidity of 91%. In contrast, August brings a warm and inviting atmosphere, with average temperatures ranging from a mild 10°C (50°F) at night to a pleasant maximum of 25°C (77°F) during the day. The month also sees a bit more precipitation, totaling 78 mm (3.1 in) over 10 days, but with a lower humidity level of 71%. For more insights into August weather, visit Grand Marais weather in August.

In December, temperatures in Grand Marais can plummet to a chilling minimum of -27°C (-16°F), with an average temperature around -6°C (21°F) and a maximum reaching just 9°C (48°F). The month is characterized by high humidity at 91% and receives about 63 mm (2.5 in) of precipitation over approximately 10 days. In stark contrast, September enjoys much milder weather with minimum temperatures around 2°C (36°F), an average of 13°C (56°F), and a pleasant maximum of 23°C (73°F). This month tends to be wetter, with 103 mm (4.1 in) of precipitation spread over 12 days and a lower humidity level of 73%. For a closer look at the weather conditions during September, check out Grand Marais weather in September.

When comparing the weather in December and October, it’s clear that December is significantly colder. Average temperatures in December hover around -6°C (21°F), with lows plunging to -27°C (-16°F), while October sees more moderate conditions with an average of 7°C (45°F) and a maximum of 18°C (64°F). Precipitation is also noteworthy; December experiences 63 mm (2.5 in) of precipitation over approximately 10 days, whereas October has more rain, totaling 101 mm (4.0 in) over 12 days. Additionally, December's humidity is higher at 91%, compared to October's 81%. For more detailed information, you can check Grand Marais weather in October.

December's weather in Grand Marais is significantly colder than in November, with average temperatures hovering around -6°C (21°F) compared to November's -1°C (31°F). The minimum temperatures in December can plunge to -27°C (-16°F), while November's minimum dips to a milder -14°C (7°F). Additionally, December experiences slightly more precipitation, with 63 mm (2.5 in) over about 10 days, compared to November's 54 mm (2.1 in) across 9 days. Humidity levels are also higher in December, reaching 91%, compared to November's 87%. For a more detailed look at the weather patterns during this month, check out Grand Marais weather in November.

Compare Grand Marais's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Grand Marais

As December settles over Grand Marais, the weather takes a notable turn, characterized by chillier temperatures and increased humidity. With the average temperature plunging to a brisk -6°C, the month showcases a stark contrast to the milder conditions seen in previous months. Precipitation also makes its presence felt; nearly a third of the month's days experience rainfall or snow, adding a moist element to the wintry scene. As the landscape transforms into a snow-dusted wonderland, the atmosphere is thick with cozy charm, making December a truly unique month in the annual weather cycle. For a deeper dive into the climatic trends, visit Grand Marais Climate.