Last updated: February 24, 2025
In December, Friday Harbor experiences a cool and wet climate characterized by an average temperature of 7°C (45°F), with daily highs reaching up to 12°C (54°F) and lows plunging as low as -7°C (20°F). The region sees significant precipitation, totaling 161 mm (6.3 in) across 18 days, contributing to a high humidity level of 87%. This combination of cooler temperatures and frequent rainfall creates a unique winter atmosphere, perfect for those who appreciate the enchanting charm of the Pacific Northwest during the holiday season.
December in Friday Harbor marks a notable transition in temperatures as winter sets in. The month opens with minimum temperatures dipping down to -7°C (20°F), showcasing a distinct chill compared to the milder conditions of the preceding months. While the average temperature holds steady at a crisp 7°C (45°F), it reflects the cooler climate typical of late fall and early winter. Daytime highs reach up to 12°C (54°F), contributing to a chilly yet vibrant atmosphere as the community prepares for the holidays. This trend of cooling down not only signals a time for cozy indoor activities but also beautifully contrasts the warmer temperatures of earlier months, making December a unique month in the seasonal cycle of Friday Harbor.
In December, Friday Harbor experiences a notable uptick in precipitation, with 161 mm (6.3 in) falling across 18 days. This increase follows November's significant rainfall of 194 mm (7.6 in), showcasing a trend of heightened moisture as the year draws to a close. Comparatively, December's precipitation is higher than that of many months earlier in the year, underscoring its position as one of the wetter times in the region. As winter settles in, the combination of rainfall and cooler temperatures sets the stage for a tranquil but damp atmosphere, characteristic of the season in this picturesque coastal locale.
In December, Friday Harbor experiences a humidity level of 87%, maintaining its trend of elevated moisture as the year winds down. The data reveals a notable consistency in humidity throughout the colder months, with readings hovering around 86% from January to April. As spring approaches, humidity gradually dips, reaching its lowest point in August at 77%. However, the onset of fall sees a rebound in moisture levels, peaking again in October at 88%. December’s relatively high humidity reflects the region's characteristic dampness during winter, contributing to the enchanting, misty ambiance typical of this picturesque locale.
In December, Friday Harbor experiences a notably low UV Index of 1, reflecting a steady decline from the higher values seen during the summer months. This low exposure category indicates a minimal risk of harm from unprotected sun exposure, with a safe burn time of 45 minutes. As the year draws to a close, residents and visitors can enjoy outdoor activities with little concern for sun damage, a refreshing contrast to the very high UV levels of June and July. For more detailed information on UV exposure throughout the year, check out Friday Harbor UV Index.
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In Friday Harbor, December is characterized by a gentle decline in sunshine hours, offering 101 hours of light as the year winds down. This marks a noticeable dip from the vibrant summer months, where sunshine peaked at 390 hours in July. As autumn settled in, September and October still boasted plenty of bright days, with 265 and 200 hours respectively, but November's sharp drop to 130 hours hinted at the shorter, chillier days ahead. Despite the limited daylight in December, the festive spirit and the serene beauty of falling snow can still bring warmth to this charming coastal community, making for a cozy end to the year.
In Friday Harbor, the likelihood of sunny weather in December stands at a modest 21%, mirroring the trends seen in both January and November. As the year winds down, the opportunities for sunshine remain quite limited, reflecting a steady decline from the brighter months of April and June, when the chances peak at 55% and 58% respectively. The gradual transition from summer's abundant sunlight in July—which boasts a 77% chance—to the gloomier winters illustrates a clear seasonal pattern. As December approaches, residents and visitors alike can expect to see more overcast skies, with sunshine playing a fleeting role in the Pacific Northwest backdrop.
In December, Friday Harbor experiences a return to shorter days, with a modest daylight duration of 8 hours. This trend marks the culmination of a gradual decline from the lengthy summer days of 16 hours in June and 15 hours in July. As the year progresses into the colder months, daylight steadily decreases, reaching its lowest point just before winter solstice. The contrast is striking when compared to the longer days of April through May, which showcase the lush vibrancy of spring and early summer. Despite the brevity of December sunlight, each hour serves as a reminder of the cyclical nature of the seasons, setting the stage for the eventual return of longer days as winter fades into spring.
As December rolls into Friday Harbor, the average wind speed picks up to 6.7 m/s (15 mph), making it one of the breeziest months of the year. This uptick reflects a broader trend of increasing wind speeds as winter approaches, with January and November also showcasing similar gusty conditions at 6.3 m/s (14 mph) and 6.4 m/s (14 mph) respectively. The year begins with a steady breeze that gradually tapers off in the spring and summer months, hitting a low of 3.9 m/s (9 mph) in April. However, as autumn arrives, the winds regain their momentum, leading into the gustier winter months, emphasizing a seasonal cycle of calming summer breezes giving way to invigorating winter winds. December serves as a reminder of this rhythm, ushering in the holiday season with a refreshing gust that invigorates the coastal charm of Friday Harbor.
The weather in Friday Harbor 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 Friday Harbor and find detailed weather information for every month.
December and January weather show some similarities but also notable differences. In December, temperatures range from a chilly minimum of -7°C (20°F) to a mild maximum of 12°C (54°F), with an average around 7°C (45°F). This month experiences more precipitation, totaling 161 mm (6.3 in) over about 18 days, accompanied by a high humidity level of 87%. In contrast, January sees slightly warmer temperatures, with a minimum of -3°C (27°F) and a maximum of 11°C (52°F); the average remains almost the same at 7°C (44°F). Precipitation decreases to 143 mm (5.6 in) over 16 days, and humidity slightly drops to 86%. For more detailed information, check out Friday Harbor weather in January.
In comparing the weather of December and February, December typically experiences colder temperatures, with a minimum of -7°C (20°F) and an average of 7°C (45°F), whereas February sees slightly milder conditions, with a minimum of -3°C (27°F) and an average of 6°C (42°F). Precipitation is also notable in both months, with December receiving 161 mm (6.3 in) over 18 days, compared to February's 126 mm (5.0 in) over 17 days. Humidity levels are slightly higher in December at 87%, compared to 85% in February, making December feel a bit more damp as the year winds down. For more detailed weather patterns, you can check the Friday Harbor weather in February.
December and March offer distinct differences in weather, despite having similar average temperatures. In December, temperatures can dip as low as -7°C (20°F), with an average high of 12°C (54°F). The month is characterized by higher precipitation, with 161 mm (6.3 in) over 18 days, and humidity levels at 87%. Conversely, March sees milder conditions, with a minimum temperature of 2°C (35°F) and average highs remaining the same at 12°C (55°F). Precipitation decreases significantly to 84 mm (3.3 in), recorded over 14 days, while humidity slightly lowers to 86%. For a more detailed overview, you can check Friday Harbor weather in March.
In December, the weather is significantly colder, with average temperatures ranging from a minimum of -7°C (20°F) to a maximum of 12°C (54°F). The month is also quite wet, receiving approximately 161 mm (6.3 in) of precipitation over 18 days, accompanied by high humidity levels of 87%. In contrast, April sees milder temperatures, with averages fluctuating between 4°C (39°F) and 14°C (57°F). The precipitation drops to about 65 mm (2.6 in) across 13 days, paired with a slightly lower humidity of 86%. For more detailed information, check out Friday Harbor weather in April.
December and May exhibit striking differences in weather patterns. In December, temperatures can plunge as low as -7°C (20°F), with an average of 7°C (45°F) and a maximum of 12°C (54°F). This month also sees significant precipitation, totaling 161 mm (6.3 in) over 18 days, accompanied by high humidity levels averaging 87%. In contrast, May brings milder conditions, with temperatures starting at a minimum of 6°C (44°F) and averaging 11°C (52°F), peaking at 18°C (64°F). Precipitation drops dramatically to 39 mm (1.5 in) over just 7 days, and humidity decreases slightly to 81%. For a more detailed look at May's weather, you can visit Friday Harbor weather in May.
The weather in December contrasts significantly with that of June. In December, temperatures can plunge to a minimum of -7°C (20°F), with an average of 7°C (45°F) and a maximum of 12°C (54°F). This month experiences a substantial amount of precipitation, totaling 161 mm (6.3 in) over 18 days, along with high humidity levels at 87%. In contrast, June boasts milder temperatures with a minimum of 10°C (49°F), an average of 13°C (55°F), and a pleasant maximum of 20°C (69°F). Rainfall is minimal in June, amounting to only 32 mm (1.3 in) over just 6 days, and humidity slightly decreases to 83%. For those interested in more details, you can check Friday Harbor weather in June.
When comparing December and July weather, significant differences emerge in temperature, precipitation, and humidity. December experiences chilly temperatures, with a minimum of -7°C (20°F) and an average around 7°C (45°F), while July enjoys much milder conditions, ranging from a minimum of 11°C (52°F) to a comfortable average of 14°C (58°F). Precipitation is notably higher in December, totaling 161 mm (6.3 in) over 18 days, compared to July’s much drier statistics of only 16 mm (0.6 in) across just 3 days. Despite December's greater precipitation, both months maintain high humidity levels, with December at 87% and July slightly lower at 84%. For a closer look at the summer weather, you can check out Friday Harbor weather in July.
December and August exhibit starkly contrasting weather patterns. In December, temperatures can dip as low as -7°C (20°F), with an average temperature of around 7°C (45°F) and highs reaching 12°C (54°F). This month is characterized by significant precipitation, averaging 161 mm (6.3 in) over about 18 days, coupled with high humidity at 87%. In contrast, August offers milder conditions with minimum temperatures of 12°C (55°F) and averages around 15°C (59°F), peaking at 20°C (69°F). The summer month experiences much less rainfall, totaling only 15 mm (0.6 in) over about 3 days, and a lower humidity level of 77%. For a more detailed look at August weather, check out Friday Harbor weather in August.
In comparing the weather between December and September, a notable shift in temperatures and precipitation patterns is evident. December experiences much colder temperatures, with a minimum of -7°C (20°F) and an average of 7°C (45°F), while September has milder conditions, featuring a minimum of 11°C (51°F) and an average of 13°C (57°F). Precipitation also varies significantly; December sees 161 mm (6.3 in) over 18 days, in contrast to September's lighter rainfall of 68 mm (2.7 in) spread across just 9 days. Additionally, the humidity levels in December are higher at 87%, compared to September's 76%. This stark contrast highlights the seasonal transition from the warm, damp days of late summer to the chilly, wetter conditions of winter. For more details on September weather, visit Friday Harbor weather in September.
December weather is markedly colder than October, with average temperatures ranging from a minimum of -7°C (20°F) to a maximum of 12°C (54°F). In contrast, October enjoys milder conditions, with temperatures averaging from a minimum of 5°C (41°F) to a maximum of 15°C (60°F). Precipitation levels are higher in December, totaling 161 mm (6.3 in) over 18 days, compared to October's 128 mm (5.1 in) across 15 days. Humidity remains relatively high in both months, with December at 87% and October slightly higher at 88%. For a deeper dive into October weather specifics, check out Friday Harbor weather in October.
In comparing the weather between December and November, December tends to be colder, with minimum temperatures dropping to -7°C (20°F) compared to November's milder minimum of 4°C (39°F). While both months experience similar average and maximum temperatures, December's average is slightly lower at 7°C (45°F) versus November's 9°C (48°F). Precipitation is also notable; December receives 161 mm (6.3 in) over 18 days, while November sees a higher total of 194 mm (7.6 in) across 19 days. Interestingly, both months maintain the same humidity level at 87%. For more detailed weather insights, check out Friday Harbor weather in November.
December in Friday Harbor brings a notable shift in weather as the island experiences its coolest temperatures and increased precipitation compared to other months. With an average high of 7°C and a minimum dipping to -7°C, the chilly air is often accompanied by frequent rain, resulting in a humid environment that can feel particularly brisk. This month typically sees about 18 days of rain, contributing to the lush greenery that characterizes the area in the winter. For those interested in how December fits into the broader climate pattern, more detailed information can be found at Friday Harbor Climate.