December Weather in Tillamook, United States

Last updated: February 24, 2025

December in Tillamook, United States, presents a chilly ambiance characterized by a maximum temperature reaching 13°C (56°F) and an average of 5°C (42°F), dipping as low as -8°C (18°F). The month is notably wet, accumulating 278 mm (11.0 in) of precipitation over 21 days, creating a damp and cozy environment. With humidity levels soaring at 87%, the weather invites a unique blend of winter beauty, making it a perfect time for reflective moments and enjoying the cozy indoors of this charming coastal town.

December Temperature in Tillamook

In December, Tillamook experiences a notable shift as temperatures dip into the winter chill, showcasing a minimum of -8°C (18°F) and an average hovering around 5°C (42°F). The maximum temperatures peak at 13°C (56°F), marking a departure from the milder autumn months. This pattern reflects a broader trend of declining warmth as the year draws to a close, with December presenting the coldest nightly temperatures since the summer season. While the average temperature mirrors that of previous months, the stark contrast between the highs and lows signals the onset of winter, inviting residents and visitors alike to bundle up and embrace the cozy charm of the season.

December Weather in Tillamook: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Tillamook, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec424044485357606259514642
Data source: Temperature data for Tillamook generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Tillamook

December in Tillamook marks the peak of precipitation, with 278 mm (11.0 in) of rain falling over the course of 21 days, making it one of the wettest months of the year. This trend sets December apart from the drier summer months, where rainfall typically plummets to mere traces, with July and August receiving only 9 mm (0.4 in) and 7 mm (0.3 in) respectively. As the year draws to a close, the relentless moisture serves to replenish the lush greenery that defines the Pacific Northwest. With November already showcasing high precipitation levels at 238 mm (9.4 in), it's evident that winter brings a significant surge in rainfall, filling the rivers and invigorating the landscape ahead of the new year.

December Precipitation Trends in Tillamook

The chart displays monthly precipitation patterns in Tillamook, 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.
JanFebMarAprMayJunJulAugSepOctNovDec25522317315070569791160238278
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Tillamook

In December, Tillamook, United States experiences a notable increase in humidity, closing the year with levels at 87%. This marks a significant rise from the more moderate 71% observed in September and reflects a pattern of fluctuating humidity throughout the year. The late months of the year see humidity levels climbing, with November at 87% as well, hinting at a trend where winter brings back the moisture that characterizes Tillamook's climate. Overall, the year's data reveals a gradual decrease in humidity from the spring months, bottoming out in August at 74%, before the late autumn and winter months push moisture levels back up, creating a cozy and humid atmosphere as the colder weather settles in.

December Average Humidity in Tillamook

This chart illustrates the average monthly humidity levels in Tillamook, 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.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%85%83%83%84%82%74%71%81%87%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Tillamook

In December, the UV Index in Tillamook, Oregon, drops to a low level of 2, reflecting a notable shift from the intense exposure experienced during the summer months. Throughout the year, the UV Index begins its climb in January with a 2, eventually peaking at a 10 in June and July before tapering off towards winter. By December, residents can enjoy longer burn times of 45 minutes without significant risk of sunburn, a stark contrast to the summer's 15 minutes under very high UV conditions. This seasonal fluctuation highlights the importance of adapting sun safety practices throughout the year. For more details on UV trends, visit Tillamook UV Index.

Maximum UV Index Levels in Tillamook for December

The chart shows the monthly maximum UV Index (UVI) for Tillamook 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.
JanFebMarAprMayJunJulAugSepOctNovDec23579101087532
Data source: Tillamook 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 Tillamook

In Tillamook, December brings a gentle dip in sunshine hours, offering 104 hours of light as the year draws to a close. This shift follows a consistent trend of increasing daylight, peaking at 359 hours in July. The transition from the vibrant springs of April and May, where the sun bathes the region in 223 and 281 hours respectively, leads to softer winter days. Each month paints a vivid picture of the changing seasons, with December ushering a calm retreat from the summer's brilliance, but still embracing the lingering warmth of the shorter days. As the sun sets earlier, the cozy ambiance of the season invites reflection and warmth, marking another chapter in Tillamook's rhythmic dance with the sun.

Monthly Sunshine Duration in Tillamook: December Highlighted

The December sunshine duration represents the total number of hours Tillamook 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.
JanFebMarAprMayJunJulAugSepOctNovDec86h124h196h223h281h311h359h326h261h203h127h104h
Data source: Tillamook December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Tillamook During December

December in Tillamook, United States, tends to usher in a significantly lower likelihood of sunny weather, with only a 12% chance of sunshine. This follows a notable decline from the sunnier months, peaking in mid-summer with July at 54%. The trend clearly shows that as the year winds down, the chances of experiencing bright, sunny days in Tillamook dwindle, especially when compared to the 49% chance in April and 34% in March. With the festive season unfolding under predominantly overcast skies, residents and visitors should prepare for the more muted, cloudy winter best characterized by the coasts of the Pacific Northwest.

Percentage of Sunny Days in December in Tillamook

The chart illustrates the percentage of sunny days in Tillamook 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 Tillamook experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec16%13%34%49%28%51%54%44%44%28%14%13%
Data source: Tillamook December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Tillamook in December

As December arrives in Tillamook, the daylight hours begin to wane, peaking at 8 hours—the lowest of the year. This decline is a stark contrast to the sun-drenched heights of June and July, which bask in 15 hours of daylight. Following the gradual increase from winter's depths in January and February, where the days stretch to 9 and 10 hours respectively, December reinforces the seasonal rhythm of shorter days and longer nights. The transition from the longer days of summer through autumn’s moderate decline culminates in this month of twilight, inviting a cozy retreat indoors as the community prepares for the bustling holidays ahead.

Average Daylight Hours in Tillamook for December

The chart illustrates the variation in daylight duration in Tillamook throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 9m10h 24m11h 57m13h 33m14h 55m15h 36m15h 13m13h 59m12h 27m10h 52m9h 28m8h 45m
Data source: Tillamook daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Tillamook

In December, Tillamook experiences a gentle breeze with an average wind speed of 3.2 m/s (7 mph), maintaining a consistency seen throughout the winter months. Following a slight increase in November, where the winds picked up to 3.5 m/s (8 mph), December showcases a return to similar speed patterns from October. This month marks the year's transition into the colder season, but the winds remain relatively calm compared to earlier autumn months, such as January and February, where speeds are slightly higher. Overall, the wind in December offers a tranquil ambience, conducive to both outdoor activities and cozy indoor retreats, embodying the serene charm of Tillamook's winter landscape.

Average December Wind Speed in Tillamook

The chart displays monthly wind speed patterns in Tillamook, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.23.42.92.42.62.22.42.32.43.13.53.2 m/s
Data source: Tillamook December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Tillamook Compares to Other Months

The weather in Tillamook 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 Tillamook and find detailed weather information for every month.

In comparing December and January weather, January tends to be slightly milder, with average temperatures reaching 6°C (43°F) compared to December's average of 5°C (42°F). Both months experience cold minimums, consistently reaching -8°C (18°F). However, January has a slightly higher maximum temperature of 15°C (60°F) compared to December's 13°C (56°F). Precipitation is also reduced in January, totaling 255 mm (10.0 in) over 17 days, whereas December sees 278 mm (11.0 in) spread across 21 days. Humidity levels remain similar, with December at 87% and January at 85%. For more detailed information, refer to Tillamook weather in January.

December and February in Tillamook exhibit notable differences in weather patterns. In December, temperatures dip to a minimum of -8°C (18°F) and can reach a maximum of 13°C (56°F), with an average of 5°C (42°F). This month is characterized by significant precipitation, accumulating 278 mm (11.0 in) over 21 days, along with high humidity levels at 87%. Conversely, February experiences slightly milder temperatures, with a minimum of -5°C (23°F) and a maximum of 16°C (62°F), while maintaining an average temperature of 5°C (41°F). Precipitation decreases to 223 mm (8.8 in) across 19 days, and humidity falls slightly to 84%. For a detailed view of what to expect, check out Tillamook weather in February.

When comparing the weather in December and March, December is characterized by colder temperatures, with minimums reaching -8°C (18°F), while March sees milder conditions with minimums around -3°C (27°F). Average temperatures in December hover around 5°C (42°F), compared to a slightly warmer average of 6°C (44°F) in March, peaking at a significantly higher maximum of 23°C (73°F) in the latter month. Precipitation levels are also notable, with December experiencing a total of 278 mm (11.0 in) over 21 days, while March has less rainfall at 173 mm (6.8 in) across 18 days, contributing to a somewhat drier environment. The humidity levels remain relatively high in both months, with December at 87% and March slightly lower at 85%. For more detailed information about March weather, visit Tillamook weather in March.

The weather in December is notably colder than in April, with temperatures ranging from a frigid minimum of -8°C (18°F) to a pleasant maximum of 13°C (56°F), and an average temperature of 5°C (42°F). In contrast, April boasts a milder climate, featuring temperatures that vary from a low of -1°C (30°F) to a high of 26°C (79°F), with an average of 9°C (48°F). Additionally, December experiences a higher level of precipitation, totaling 278 mm (11.0 in) over 21 days, while April sees significantly less rain at 150 mm (5.9 in) across just 15 days. Humidity remains relatively high in both months, with December at 87% and April slightly lower at 83%. For more specific details on what to expect, you can check Tillamook weather in April.

December and May showcase starkly contrasting weather patterns. In December, temperatures range from a chilly minimum of -8°C (18°F) to a mild maximum of 13°C (56°F), with an average of around 5°C (42°F). The month is characterized by considerable precipitation, totaling 278 mm (11.0 in) over about 21 days, and a high humidity level of 87%. In contrast, May experiences a much warmer climate, with temperatures ranging from a low of 2°C (36°F) to a high of 30°C (87°F), averaging 11°C (53°F). Precipitation is significantly lower, with only 70 mm (2.7 in) over 11 days and a slightly lower humidity of 83%. For more details about the weather in May, check out Tillamook weather in May.

December and June present strikingly different weather patterns. In December, temperatures are notably colder, with a minimum of -8°C (18°F) and an average of 5°C (42°F), while precipitation is significant at 278 mm (11.0 in) over 21 days, contributing to the high humidity of 87%. In stark contrast, June experiences a much warmer climate with minimum temperatures at 5°C (41°F) and an average of 14°C (58°F). The maximum temperature can soar to 40°C (104°F), but the month has considerably less rainfall, with only 56 mm (2.2 in) over just 8 days, and humidity at 83%. For more detailed insights, check out Tillamook weather in June.

The weather in December is notably colder and wetter than in July. With average temperatures hovering around 5°C (42°F), December experiences a minimum of -8°C (18°F) and can reach a maximum of 13°C (56°F). In contrast, July boasts much warmer temperatures, ranging from a minimum of 7°C (45°F) to a sweltering maximum of 34°C (93°F), with an average of 16°C (61°F). Precipitation is significantly higher in December, with 278 mm (11.0 in) over 21 days, while July sees just a mere 9 mm (0.4 in) across only 2 days. Humidity levels are quite similar, sitting at 87% in December and 82% in July. For a deeper look at July's weather, you can check out Tillamook weather in July.

December and August present starkly contrasting weather patterns. In December, temperatures can plummet to a minimum of -8°C (18°F), with an average of about 5°C (42°F) and a maximum of 13°C (56°F). This winter month often brings significant precipitation, totaling 278 mm (11.0 in) over 21 days, paired with high humidity levels averaging 87%. In contrast, August offers a much milder climate, with minimum temperatures around 8°C (46°F) and average highs reaching up to 37°C (99°F). The month is typically dry, seeing only 7 mm (0.3 in) of precipitation over just 2 days, and features lower humidity at 74%. For more details, you can check the link: Tillamook weather in August.

When comparing the weather in December and September, it's clear that these months present quite different climates. December features much colder temperatures, with averages around 5°C (42°F) and a minimum dipping as low as -8°C (18°F), while September enjoys milder conditions, with averages soaring to 15°C (59°F) and maximums reaching up to 33°C (92°F). In terms of precipitation, December is significantly wetter, accumulating 278 mm (11.0 in) over 21 days of rainfall compared to September's 91 mm (3.6 in) across just 8 days. Additionally, December's humidity is notably higher at 87%, reflecting the damp winter conditions, whereas September experiences a more comfortable humidity level of 71%. For a more detailed look at what to expect during this time, you can check out Tillamook weather in September.

December weather is notably colder and wetter compared to October. With average temperatures ranging from -8°C (18°F) to 13°C (56°F) and a high of 13°C (56°F), December sees more severe winter conditions. In contrast, October boasts milder temperatures, with a low of -1°C (31°F) and a high reaching up to 24°C (76°F), offering a much more temperate experience. Additionally, December's precipitation is significantly higher at 278 mm (11.0 in), occurring over 21 days, compared to October's 160 mm (6.3 in) spread over just 13 days. The humidity is also a bit higher in December at 87%, compared to October's 81%. For a closer look at October weather specifics, check out Tillamook weather in October.

December weather is notably colder than November, with average temperatures dipping from 8°C (46°F) in November to 5°C (42°F) in December. The minimum temperature in December can reach a chilling -8°C (18°F), compared to November's milder -4°C (25°F). Additionally, December sees increased precipitation, with 278 mm (11.0 in) falling over 21 days, compared to November's 238 mm (9.4 in) over 18 days. Despite the similarity in humidity levels, which remain consistent at 87%, the overall climate in December feels markedly harsher. For a closer look at November's weather patterns, you can check Tillamook weather in November.

Compare Tillamook's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Tillamook

As December rolls into Tillamook, the weather takes on a distinctly chillier character compared to other months. With average temperatures hovering around a cool 5°C (42°F) and frequent drops to -8°C (18°F), the month embraces winter's grip. Precipitation becomes a common theme, with rain gracing the city for about 21 days, resulting in a substantial 278 mm (11.0 in) by month’s end. The high humidity of 87% adds to the brisk atmosphere, fostering a serene yet damp environment. For those eager to explore how December's weather fits into the broader climatic picture, check out Tillamook Climate for more insights.