December Weather in Lake Arrowhead, United States

Last updated: February 24, 2025

In December, Lake Arrowhead experiences a dynamic winter climate characterized by a maximum temperature of 24°C (76°F) and an average of 9°C (49°F), while chilling down to a minimum of -4°C (25°F). This month typically sees around 56 mm (2.2 in) of precipitation over 5 days, contributing to the area's lush scenery and vibrant ecosystem. Coupled with a humidity level of 75%, the atmosphere is both crisp and refreshing, making it an ideal time for outdoor enthusiasts to enjoy the breathtaking winter landscapes and festive charm of this picturesque locale.

December Temperature in Lake Arrowhead

As December rolls into Lake Arrowhead, temperatures begin to dip, marking the onset of winter. The month features a minimum temperature of -4°C (25°F), creating opportunities for cozy fires and festive activities. With an average temperature hovering around 9°C (49°F) and a maximum reaching 24°C (76°F), December strikes a balance between chilly and mild days, making it an ideal time for outdoor adventures and holiday gatherings. This trend of cooler temperatures sets the stage for the colder months ahead, inviting locals and visitors alike to embrace the crisp air and stunning winter landscapes that define this enchanting lakeside retreat.

December Weather in Lake Arrowhead: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Lake Arrowhead, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec484952596373797974645748
Data source: Temperature data for Lake Arrowhead 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 Lake Arrowhead

In December, Lake Arrowhead experiences a notable uptick in precipitation, matching February with 56 mm (2.2 in) of rainfall over five days. This winter month serves as a critical transition, indicating that the region is emerging from the drier fall months where October and November recorded significantly lower rainfall at 8 mm and 19 mm, respectively. Compared to the scant precipitation in summer, with June and August receiving less than 12 mm, December's generous amounts herald the start of the wet season. This trend of increased precipitation not only contributes to the lake levels but also sets the stage for lush landscapes in the coming months.

December Precipitation Trends in Lake Arrowhead

The chart displays monthly precipitation patterns in Lake Arrowhead, 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.
JanFebMarAprMayJunJulAugSepOctNovDec515653241341211981956
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Lake Arrowhead

In December, Lake Arrowhead experiences a notable rise in humidity, reaching around 75%. This increase marks a return to the higher humidity levels seen at the beginning of the year, a stark contrast to the notably dry summer months when levels dipped to an arid 29% in July and 28% in August. As winter approaches, humidity begins to climb again, with November's 68% setting the stage for December's slight uptick. Overall, the data reveals a clear seasonal trend: as temperatures cool and winter sets in, humidity levels rise, contributing to the region's crisp, refreshing atmosphere that characterizes the holiday season.

December Average Humidity in Lake Arrowhead

This chart illustrates the average monthly humidity levels in Lake Arrowhead, 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.
JanFebMarAprMayJunJulAugSepOctNovDec76%80%69%57%45%34%29%28%42%54%68%75%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Lake Arrowhead

As winter settles in Lake Arrowhead, December brings a moderate UV Index of 4, mirroring the January levels. With a burn time of 30 minutes, outdoor enthusiasts can enjoy winter activities while still being mindful of UV exposure. This month marks a notable decline from the extreme levels seen in summer, particularly in June and July, where the UV Index peaked at 12. The transition from high and very high indices in the spring and early fall to December’s more forgiving levels highlights the seasonal variations in sun intensity. For more detailed insights into UV radiation and seasonal trends, visit Lake Arrowhead UV Index.

Maximum UV Index Levels in Lake Arrowhead for December

The chart shows the monthly maximum UV Index (UVI) for Lake Arrowhead 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.
JanFebMarAprMayJunJulAugSepOctNovDec469111112121110854
Data source: Lake Arrowhead 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 Lake Arrowhead

December in Lake Arrowhead sees 228 hours of sunshine, marking a reflective dip as the year draws to a close. This month contrasts sharply with the sun-drenched heights of summer, where July shines brightest at 383 hours. As the seasons transition, the winter chill sets in, leading to shorter daylight hours compared to the vibrant spring months like April and May, which offer 328 and 370 hours of sun, respectively. Despite the decline in brightness, December remains a cozy time to enjoy the serene beauty of the lake, hinting at the peacefulness that winter brings to this idyllic mountain retreat.

Monthly Sunshine Duration in Lake Arrowhead: December Highlighted

The December sunshine duration represents the total number of hours Lake Arrowhead 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.
JanFebMarAprMayJunJulAugSepOctNovDec190h244h295h328h370h379h383h363h322h299h258h228h
Data source: Lake Arrowhead December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Lake Arrowhead During December

In Lake Arrowhead, December brings a noticeable shift in sunny weather, with a 49% chance of clear skies, signaling the start of winter's embrace. This marks a significant decline from the sunny extravagance of earlier months, as the region enjoys peak sunshine in September and August with 87% and 82% likelihoods, respectively. Interestingly, the sun typically shines brightest in spring and early summer, peaking in May at 80% and hovering around the 70% mark through mid-year. As the year winds down, however, the chance of bright days dips, reminding residents and visitors alike that December is a time for cozy indoor gatherings rather than sun-soaked adventures.

Percentage of Sunny Days in December in Lake Arrowhead

The chart illustrates the percentage of sunny days in Lake Arrowhead 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 Lake Arrowhead experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec61%71%66%67%80%75%63%82%87%71%77%49%
Data source: Lake Arrowhead December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Lake Arrowhead in December

As December arrives in Lake Arrowhead, daylight begins to wane, offering only nine hours of light compared to the longer days earlier in the year. Following a steady increase from ten hours in January and November, daylight peaks in June and July at fourteen hours each, providing ample time for outdoor activities. The transition from summer to winter is marked by a gradual decline, with the hours of daylight decreasing significantly in the fall and culminating in December's shorter days. This seasonal shift not only influences the local landscape but also sets a cozy, reflective tone as the community embraces the winter months.

Average Daylight Hours in Lake Arrowhead for December

The chart illustrates the variation in daylight duration in Lake Arrowhead throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 8m10h 57m11h 59m13h 3m13h 57m14h 23m14h 9m13h 21m12h 20m11h 16m10h 21m9h 53m
Data source: Lake Arrowhead daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Lake Arrowhead

As December sweeps into Lake Arrowhead, the average wind speed settles at a gentle 2.1 m/s (5 mph), reflecting a consistent trend seen throughout the year. This marks a gradual decrease from the slightly more energetic breezes of the early months, which hovered around 2.4 m/s in January through April. As the seasons shift, wind speeds tend to decline, reaching their annual low in December. Despite this subtle drop, the refreshing air continues to embrace the winter landscape, creating a serene atmosphere that invites both locals and visitors to appreciate the tranquil beauty of the lake during this quiet yet picturesque month.

Average December Wind Speed in Lake Arrowhead

The chart displays monthly wind speed patterns in Lake Arrowhead, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.42.22.32.42.32.22.12.22.02.12.12.1 m/s
Data source: Lake Arrowhead December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Lake Arrowhead Compares to Other Months

The weather in Lake Arrowhead 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 Lake Arrowhead and find detailed weather information for every month.

In December, the weather features a minimum temperature of -4°C (25°F) and an average of 9°C (49°F), while January sees a slightly cooler minimum of -5°C (24°F), yet maintains the same average temperature of 9°C (49°F) and maximum of 24°C (76°F). Precipitation in December totals 56 mm (2.2 in) over 5 days, while January experiences slightly less at 51 mm (2.0 in) across 6 days. Humidity remains fairly constant, with December at 75% and January marginally higher at 76%. For more details on what to expect, you can check out Lake Arrowhead weather in January.

When comparing the weather in December and February, we see some interesting similarities and slight variations. Both months experience a minimum temperature of around -4°C (25°F) and an average temperature of approximately 9°C (49°F). The maximum temperatures in December peak at 24°C (76°F), while in February they slightly rise to 25°C (77°F). Precipitation levels remain consistent, with both months averaging 56 mm (2.2 in), although February experiences one additional rainy day, totaling six days of precipitation. Notably, February tends to be a bit more humid, with humidity levels at 80% compared to December's 75%. For a detailed overview of weather conditions during February, you can check Lake Arrowhead weather in February.

When comparing the weather in December and March, December experiences cooler temperatures, with a minimum of -4°C (25°F) and an average of 9°C (49°F), while March shows a slight increase with temperatures ranging from a minimum of -2°C (29°F) to an average of 11°C (52°F). December also reaches a maximum of 24°C (76°F), but March peaks at a warmer 29°C (84°F). Precipitation in December totals 56 mm (2.2 in) over approximately 5 days, while March has slightly less precipitation at 52 mm (2.1 in) but occurs over more days, totaling 9. Additionally, humidity levels are slightly higher in December at 75%, compared to 69% in March. For more details, you can check Lake Arrowhead weather in March.

December and April present contrasting weather patterns. In December, temperatures range from a chilly minimum of -4°C (25°F) to a comfortable average of 9°C (49°F), with maximums reaching 24°C (76°F). The month sees about 56 mm (2.2 in) of precipitation over five days, accompanied by high humidity levels at 75%. In contrast, April boasts milder conditions with a minimum of 3°C (37°F) and an average temperature of 15°C (60°F), peaking at a warm 32°C (89°F). Precipitation drops significantly to 24 mm (0.9 in) over just two days and the humidity is lower at 57%. For more detailed information, you can check out Lake Arrowhead weather in April.

December and May present contrasting weather patterns. In December, temperatures can range from a chilly minimum of -4°C (25°F) to a pleasant maximum of 24°C (76°F), with an average temperature of 9°C (49°F). This month experiences higher humidity at 75% and greater precipitation, totaling 56 mm (2.2 in) over an average of 5 days. In contrast, May offers a more temperate climate, with minimum temperatures starting at 3°C (37°F) and peaking at a warm 34°C (94°F), averaging 17°C (64°F). Precipitation is significantly lower in May, with only 13 mm (0.5 in) spread over just 3 days and humidity dropping to 45%. For a detailed look at the weather specifics, visit Lake Arrowhead weather in May.

In December, the weather in Lake Arrowhead is quite chilly, with temperatures ranging from a minimum of -4°C (25°F) to a maximum of 24°C (76°F) and an average of 9°C (49°F). The month typically sees about 56 mm (2.2 in) of precipitation over approximately five days, contributing to a relatively high humidity of 75%. In contrast, June boasts much warmer weather, with temperatures ranging from a minimum of 9°C (48°F) to a scorching maximum of 39°C (103°F) and an average of 23°C (73°F). Precipitation significantly decreases to just 4 mm (0.1 in) over one day, and the humidity drops to a comfortable 34%. For more detailed information on the June weather, check out Lake Arrowhead weather in June.

December and July present contrasting weather patterns. December features cooler temperatures, with a minimum of -4°C (25°F) and an average of 9°C (49°F), peaking at 24°C (76°F). This month also experiences a moderate amount of precipitation, totaling 56 mm (2.2 in) over about five days, coupled with a humidity level of 75%. In stark contrast, July is much warmer, with a minimum temperature of 13°C (55°F) and an average of 26°C (79°F), soaring to a maximum of 41°C (106°F). Precipitation is minimal at 12 mm (0.5 in) and occurs on only two days, with humidity dropping significantly to 29%. For a closer look at the summer conditions, check out Lake Arrowhead weather in July.

In December, the weather is significantly cooler, with temperatures ranging from a minimum of -4°C (25°F) to a maximum of 24°C (76°F) and an average of 9°C (49°F). The month also experiences more precipitation, with about 56 mm (2.2 in) falling over five days, contributing to a higher humidity level of 75%. In contrast, August brings much warmer conditions, with temperatures ranging from a minimum of 14°C (57°F) to a scorching maximum of 39°C (103°F), and an average of 26°C (79°F). Precipitation is minimal during this month, totaling only 11 mm (0.4 in) over just two days, resulting in a much lower humidity level of 28%. For more detailed insights, check Lake Arrowhead weather in August.

December weather in Lake Arrowhead contrasts sharply with September. While December sees a chilly range of temperatures from a minimum of -4°C (25°F) to a maximum of 24°C (76°F), September boasts milder temperatures, averaging 23°C (74°F) and reaching highs of up to 42°C (108°F). In December, the area experiences significant precipitation of 56 mm (2.2 in) over about 5 days, coupled with high humidity at 75%. In contrast, September is relatively dry, with only 9 mm (0.4 in) of rainfall over just 2 days and a lower humidity level of 41%. For a detailed look at September's weather patterns, you can visit Lake Arrowhead weather in September.

When comparing the weather of December and October, notable differences emerge. December experiences much cooler temperatures, with a minimum of -4°C (25°F) and an average of 9°C (49°F), while October boasts a much warmer range, with minimums around 3°C (38°F) and an impressive maximum of 36°C (97°F), leading to an average of 18°C (65°F). Additionally, December sees increased precipitation, with 56 mm (2.2 in) over five days, compared to October's relatively dry conditions, which only logs 8 mm (0.3 in) in a single day. Humidity levels also differ, sitting at 75% in December versus a more comfortable 54% in October. For further insights, you can explore more about the climate at Lake Arrowhead weather in October.

When comparing the weather in December and November, December tends to be colder with a minimum temperature of -4°C (25°F) and an average of 9°C (49°F), while November has a milder minimum of -1°C (31°F) and an average of 14°C (57°F). Additionally, December experiences more precipitation, recording 56 mm (2.2 in) over 5 days, compared to November's 19 mm (0.8 in) over just 2 days. Humidity levels also rise slightly in December at 75%, compared to November's 68%. For more details on November weather patterns, you can check Lake Arrowhead weather in November.

Compare Lake Arrowhead's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Lake Arrowhead

December in Lake Arrowhead introduces a cooler climate as winter settles in, marked by a significant drop in temperatures compared to the preceding months. The crisp air brings an average temperature of around 9°C (49°F), with nighttime lows dipping to -4°C (25°F). While daytime highs can reach a pleasant 24°C (76°F), the overall ambiance shifts towards the refreshingly brisk, enhancing the charm of the picturesque landscape. This month also sees an increase in precipitation, with about 56 mm (2.2 in) of rain spread over five days, adding to the region's winter wonderland feel. The humidity lingers at 75%, leaving a palpable chill in the air. Embrace the unique beauty of December by exploring the local scenery, and for a deeper understanding of what to expect throughout the year, check out Lake Arrowhead Climate.