December Weather in Seaside, United States

Last updated: February 24, 2025

December in Seaside, United States offers a mild coastal climate, with maximum temperatures reaching a pleasant 24°C (75°F) and an average of 10°C (51°F). Visitors can expect cool nights, as temperatures dip to a minimum of 1°C (34°F). The month is characterized by 100 mm (3.9 in) of rainfall over approximately 8 days, contributing to a humidity level of 80%. This combination of mild temperatures and occasional rain makes December a unique time to explore the charming seaside scenery while enjoying the refreshing ocean breeze.

December Temperature in Seaside

In Seaside, United States, December welcomes the onset of winter with temperatures that range from a chilly 1°C (34°F) at night to a mild 24°C (75°F) during the day. This month maintains an average temperature of 10°C (51°F), mirroring the cooler patterns seen in November and preceding months. As the year draws to a close, days tend to be warmer compared to the frigid nights, inviting a comfortable ambiance perfect for coastal strolls. Overall, December marks a transition, hinting at the cooler winter months to come while still showcasing a touch of the milder weather typical of earlier seasons.

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

The chart illustrates December temperature patterns in Seaside, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec505051535559616362595450
Data source: Temperature data for Seaside 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 Seaside

In December, Seaside experiences a notable uptick in precipitation, with rainfall totaling 100 mm (3.9 in) over 8 days. This marks a significant contrast to the drier summer months like June and July, which see virtually no precipitation. While November sets the stage for winter with 40 mm (1.6 in) of rain, December's wetter conditions signal the heart of the season. The increase in both the amount and the number of rainy days suggests a shift towards a more robust precipitation pattern, aligning with the region's trend of heightened rainfall as the year draws to a close. This seasonal transition not only underscores the variability of Seaside’s climate but also brings a refreshing change to the coastal landscape.

December Precipitation Trends in Seaside

The chart displays monthly precipitation patterns in Seaside, 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.
JanFebMarAprMayJunJulAugSepOctNovDec1139499332332261941100
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Seaside

In December, Seaside experiences a notable increase in humidity, with levels reaching 80%, a slight rise from the 78% observed in November. This uptick signals the onset of the cooler winter months, where humidity tends to stabilize after a gradual decline from the summer highs. Throughout the warmer months, humidity was at its lowest in August at 54%, before beginning a climb as fall approached. The transition from November to December is characteristic of a returning moisture, reflecting the region’s climatic rhythms. Overall, December's humidity underscores the area's shift towards a more humid winter atmosphere, providing a refreshing contrast to the drier summer conditions.

December Average Humidity in Seaside

This chart illustrates the average monthly humidity levels in Seaside, 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.
JanFebMarAprMayJunJulAugSepOctNovDec82%84%82%78%71%64%59%54%55%62%78%80%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Seaside

In Seaside, December brings a moderate UV Index of 3, indicating a relatively low risk of harm from unprotected sun exposure. As the year progresses, the UV Index trends sharply upward from January's moderate level of 4, peaking at an extreme 11 in the summer months of May through August. This seasonal fluctuation highlights the importance of sun safety practices, particularly as the spring months approach and the index spikes to very high values. By December, residents and visitors can enjoy outdoor activities with a safe 30 minutes burn time, allowing them to bask in the radiant winter sun without excessive worry. For more detailed information on UV trends year-round, visit Seaside UV Index.

Maximum UV Index Levels in Seaside for December

The chart shows the monthly maximum UV Index (UVI) for Seaside 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.
JanFebMarAprMayJunJulAugSepOctNovDec4589111211119753
Data source: Seaside 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 Seaside

December in Seaside, United States, ushers in a gentle transition from the vibrant sunshine of summer to the cooler tones of winter, with an average of 209 hours of sunlight. While this is a dip from the sunny heights of July's 388 hours, it still offers a notable amount of daylight, perfect for those seeking a peaceful escape. As the year progresses, a clear trend emerges—the region basks in its sunniest months from May to July, while the darker winter months of January and February provide an opportunity to appreciate the cozy charm of the seaside. Overall, December’s sun serves as a reminder of the year’s ebb and flow, drawing visitors to enjoy the beauty of the coast even as the days grow shorter.

Monthly Sunshine Duration in Seaside: December Highlighted

The December sunshine duration represents the total number of hours Seaside 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.
JanFebMarAprMayJunJulAugSepOctNovDec163h220h264h302h359h376h388h357h314h289h235h209h
Data source: Seaside December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Seaside During December

As December rolls into Seaside, United States, the likelihood of sunny weather takes a notable dip, with only a 43% chance of sunshine. This marks a contrast from the sunnier months preceding it, where June and August enjoy peak probabilities of 69% and 75%, respectively. The trend shows a gradual decline in sunny days as autumn approaches winter, with November already sitting at 58%. While December may not be the best month for sun-seekers, the town's coastal charm and festive atmosphere make it a delightful time to visit, even with the clouds. So, pack your layers and don’t let the reduced sunshine discourage your seaside adventures!

Percentage of Sunny Days in December in Seaside

The chart illustrates the percentage of sunny days in Seaside 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 Seaside experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec45%55%49%53%67%69%62%75%75%61%58%44%
Data source: Seaside December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Seaside in December

As December rolls in, Seaside, United States, experiences its shortest daylight duration of the year, with just 9 hours of light. The month mirrors January's brief days, creating a sense of continuity as winter settles in. Notably, daylight duration steadily increases from the depths of winter in December, beginning in January with the gradual lengthening observed through the spring months. This upward trend culminates in 14 hours of sunlight by late spring and summer. As the year progresses, the pattern reveals a seasonal ebb and flow of light, illustrating a beautiful cycle of renewal and the approach of sunnier days ahead.

Average Daylight Hours in Seaside for December

The chart illustrates the variation in daylight duration in Seaside throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 58m10h 51m11h 59m13h 9m14h 7m14h 36m14h 20m13h 28m12h 21m11h 11m10h 11m9h 41m
Data source: Seaside daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Seaside

As December arrives in Seaside, United States, the winds begin to stir with a refreshing vigor, averaging 2.9 m/s (7 mph), which marks a noticeable uptick compared to the more subdued speeds of the late summer and early fall months. Throughout the year, the trend shows a rhythm of gentle breezes with the calmest winds in the warmer months of July and August, where they dip to 2.1 m/s (5 mph). Conversely, the latter part of the year, especially from late autumn into the winter, signals a return to more robust wind patterns, culminating in December's invigorating gusts. This transition not only highlights the seasonal shift but also invigorates the coastal landscape, creating a delightful atmosphere perfect for those who relish the fresh winter air.

Average December Wind Speed in Seaside

The chart displays monthly wind speed patterns in Seaside, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.62.82.82.83.02.72.22.12.02.62.22.9 m/s
Data source: Seaside December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Seaside Compares to Other Months

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

When comparing the weather in December and January, both months see similar minimum temperatures, averaging around 1°C (34°F) and 10°C (51°F), indicating a fairly consistent chill. However, January experiences slightly cooler maximum temperatures, averaging 21°C (70°F), compared to December's warmer 24°C (75°F). Precipitation increases in January to 113 mm (4.5 in), up from December's 100 mm (3.9 in), with both months seeing rainfall on about 8 days. Moreover, humidity rises slightly in January to 82%, compared to December's 80%, making the air feel a bit more damp. For those interested in more details, Seaside weather in January provides additional insights.

In December, temperatures range from a minimum of 1°C (34°F) to a maximum of 24°C (75°F), with an average of 10°C (51°F). The month typically sees around 100 mm (3.9 in) of precipitation over 8 days, accompanied by a humidity level of 80%. In contrast, February offers slightly cooler temperatures, with a minimum of 0°C (32°F) and a maximum of 23°C (73°F), while maintaining a similar average of 10°C (50°F). Precipitation totals in February drop slightly to 94 mm (3.7 in) over 9 days, and humidity levels rise to 84%. For more specifics on February weather, you can check out this link: Seaside weather in February.

December and March exhibit quite similar weather patterns, with average temperatures hovering around 10°C (51°F) in both months. December tends to be slightly warmer at its maximum, reaching up to 24°C (75°F), compared to March's 23°C (73°F). However, March experiences a marginally higher minimum temperature of 2°C (35°F) compared to December's 1°C (34°F). Precipitation levels are comparable as well, with December receiving 100 mm (3.9 in) over 8 days, while March sees slightly less at 99 mm (3.9 in) but over 13 days, indicating a wetter month. Humidity is also a bit higher in March, at 82%, compared to December's 80%. For more detailed information on weather conditions during March, you can check Seaside weather in March.

In December, the weather features cooler temperatures ranging from a minimum of 1°C (34°F) to a maximum of 24°C (75°F), with an average temperature of 10°C (51°F). The month experiences significant precipitation of 100 mm (3.9 in) over about 8 days, accompanied by relatively high humidity at 80%. In contrast, April brings slightly milder conditions, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 26°C (79°F) and an average of 12°C (53°F). Precipitation decreases notably to 33 mm (1.3 in) over just 5 days, and humidity also dips slightly to 78%. For an in-depth look at variety in weather during this time, check out the details on Seaside weather in April.

December and May present contrasting weather patterns. December tends to be cooler, with temperatures ranging from a minimum of 1°C (34°F) to a maximum of 24°C (75°F) and an average of 10°C (51°F). This month also sees more precipitation, totaling about 100 mm (3.9 in) over approximately 8 days, alongside higher humidity levels at 80%. In contrast, May experiences milder temperatures with a minimum of 5°C (40°F) and a maximum of 25°C (78°F), averaging 13°C (55°F). Rainfall is significantly lower in May, with just 23 mm (0.9 in) over 3 days, and humidity drops to 71%. For more specific insights into coastal conditions, check out Seaside weather in May.

In December, the weather tends to be cooler and wetter, with average temperatures ranging from a chilly 1°C (34°F) to a mild 24°C (75°F). It experiences significant precipitation, with around 100 mm (3.9 in) falling over approximately 8 days, and a high humidity level of 80%. In contrast, June offers a much warmer climate, with temperatures starting at a minimum of 6°C (43°F) and reaching up to 29°C (84°F). The month is characterized by dry conditions, seeing only about 3 mm (0.1 in) of precipitation across no rainy days, accompanied by lower humidity at 64%. For a detailed look at typical weather conditions, you can visit Seaside weather in June.

December and July present stark contrasts in weather. In December, temperatures range from a chilly minimum of 1°C (34°F) to a warmer maximum of 24°C (75°F), with an average of 10°C (51°F). This month also sees considerable precipitation, averaging 100 mm (3.9 in) over about 8 rainy days, coupled with high humidity at 80%. In contrast, July enjoys milder temperatures, with a minimum of 9°C (49°F) and a maximum reaching 26°C (79°F), averaging at 16°C (61°F). The summer month is notably dry, with a mere 2 mm (0.1 in) of rain and no recorded rainy days, alongside a significantly lower humidity of 58%. For those planning a trip, this makes July a much drier and warmer option; for more insights, check out Seaside weather in July.

In December, weather conditions are notably cooler, with temperatures ranging from a minimum of 1°C (34°F) to a pleasant average of 10°C (51°F), peaking at 24°C (75°F). This month also experiences considerable precipitation, averaging about 100 mm (3.9 in) over eight days, combined with high humidity levels of 80%. In contrast, August presents a much warmer climate, with temperatures starting at a minimum of 10°C (51°F) and averaging 17°C (63°F), while reaching highs of 30°C (87°F). Additionally, August is much drier, with only 2 mm (0.1 in) of rain and no days of significant precipitation, accompanied by a lower humidity level of 54%. For more insights on August weather, you can explore Seaside weather in August.

December and September present contrasting weather patterns, significantly influencing outdoor activities and experiences. In December, temperatures range from a chilly minimum of 1°C (34°F) to a mild maximum of 24°C (75°F), with an average of 10°C (51°F), characterized by higher humidity at 80% and an average of 100 mm (3.9 in) of precipitation over 8 days. In contrast, September boasts warmer conditions, featuring a minimum of 8°C (47°F) and soaring up to a maximum of 34°C (93°F) with an average of 17°C (62°F). This month experiences minimal precipitation, only 6 mm (0.3 in) on average, across no rainy days and lower humidity at 55%. For a closer look at what September brings, check out Seaside weather in September.

December and October present quite different weather patterns. In December, temperatures are cooler, with a minimum of 1°C (34°F) and an average of 10°C (51°F), peaking at 24°C (75°F). This month sees more precipitation, totaling around 100 mm (3.9 in) over about 8 days, and higher humidity at 80%. In contrast, October experiences warmer conditions, with a minimum of 6°C (42°F), an average of 15°C (59°F), and maximum temperatures reaching 31°C (88°F). The fall month is significantly drier, receiving only 19 mm (0.7 in) of rain over just 1 day, and the humidity is much lower at 62%. For more details on the pleasant climate, you can check Seaside weather in October.

In comparing the weather between November and December, December tends to exhibit slightly cooler minimum temperatures, averaging around 1°C compared to November's 2°C. Both months share the same maximum temperature of 24°C, but December's average temperature of 10°C is lower than November's average of 12°C. Additionally, December experiences significantly more precipitation, with 100 mm over 8 days, while November has only 40 mm over 4 days. Humidity levels are quite similar, with December at 80% and November at 78%. For a closer look at weather trends during November, you can check out Seaside weather in November.

Compare Seaside's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Seaside

As December settles in, Seaside's weather transforms into a cooler and wetter experience compared to the milder, drier months preceding it. With an average temperature that dips significantly, residents and visitors find themselves embracing the brisk air, alongside increased humidity that lingers around 80%. The month sees a fair share of rainfall, with precipitation spread across several days, creating a refreshing atmosphere that contrasts sharply with the summer sun. For those intrigued by the unique character of December’s climate, more detailed information can be found at Seaside Climate.