December Weather in Paso Robles, United States

Last updated: February 24, 2025

December in Paso Robles, California offers a blend of mild temperatures and refreshing moisture, making it a unique winter destination. The maximum temperature reaches a comfortable 25°C (78°F), while the average hovers around 10°C (49°F), with nighttime lows dipping to a chilly -2°C (29°F). Expect 59 mm (2.3 in) of precipitation over approximately 6 days, creating a lush landscape that complements the area's renowned wineries. With humidity levels at 76%, the atmosphere is crisp yet invigorating, ideal for exploring the beautiful outdoors or indulging in local attractions.

December Temperature in Paso Robles

In Paso Robles, California, December ushers in cooler temperatures as winter takes hold. The month begins with chilly minimums dipping to -2°C (29°F), while average temperatures hover around a brisk 10°C (49°F). Despite these cool figures, daytime highs remain relatively mild, peaking at 25°C (78°F). This trend of cooler mornings and comfortable afternoons reflects the transition from the warmer months, with December offering a pleasant reprieve compared to the sweltering heat of summer. As the year draws to a close, visitors can expect a refreshing climate ideal for exploring the region's renowned wineries and picturesque landscapes.

December Weather in Paso Robles: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Paso Robles, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec505153596369727270635549
Data source: Temperature data for Paso Robles 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 Paso Robles

In Paso Robles, December sees a noteworthy uptick in precipitation, with an average of 59 mm (2.3 in) reported over 6 days. This marks a significant increase compared to the drier months that precede it, particularly the summer months of June through August, which experience no rain at all. While November brings a modest 25 mm (1.0 in) from just 2 rainy days, December’s precipitation signals the onset of the wetter winter season. The pattern showcases a gradual transition from the parched conditions of summer, as the region gears up for its rainier months, illustrating a clear trend of increased precipitation as the year draws to a close.

December Precipitation Trends in Paso Robles

The chart displays monthly precipitation patterns in Paso Robles, 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.
JanFebMarAprMayJunJulAugSepOctNovDec8963721910000172560
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Paso Robles

In December, Paso Robles experiences a slight increase in humidity, reaching 76% after a gradual decline from the summer months. The data reveals a trend of decreasing humidity levels from February’s peak of 83% down to 70% in October, before rising again as the year wraps up. This seasonal fluctuation reflects a pattern where the region enjoys relatively high humidity in the early months of the year, with levels gradually dipping through the summer, only to stabilize slightly higher in the winter. As December approaches, the air retains a bit of that lingering moisture, creating a refreshing atmosphere amid the cooling temperatures.

December Average Humidity in Paso Robles

This chart illustrates the average monthly humidity levels in Paso Robles, 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.
JanFebMarAprMayJunJulAugSepOctNovDec80%83%80%76%75%74%75%72%70%70%74%77%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Paso Robles

In Paso Robles, the December UV Index drops to 3, indicating a moderate exposure category and resulting in a 30-minute burn time for most skin types. This decline in UV intensity marks a transition from the extreme levels experienced during the summer months, peaking at 12 in June and July, where exposure times sharply reduced to just 10 minutes. As the seasons change, from early spring's 8 and 9 values down to December, residents and visitors can enjoy outdoor activities with greater peace of mind. Overall, this trend highlights a significant fluctuation in UV levels throughout the year, emphasizing the importance of monitoring sun exposure. For those wanting more details, check out the Paso Robles UV Index.

Maximum UV Index Levels in Paso Robles for December

The chart shows the monthly maximum UV Index (UVI) for Paso Robles 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.
JanFebMarAprMayJunJulAugSepOctNovDec4589111212119753
Data source: Paso Robles 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 Paso Robles

December in Paso Robles brings a gentle transition into winter, with 221 hours of sunshine illuminating the month. While the total hours of sunlight dip from the vibrant highs of summer—where July basked in a remarkable 387 hours—December retains a charming glow. As the year rounds out, this decrease reflects a notable seasonal trend, moving from spring's exuberance at 315 hours in April to the quieter ambiance of early winter. Despite the shorter days, the warmth of the sun still graces Paso Robles, making December a cozy close to the year, hinting at the promise of brighter days in the months to come.

Monthly Sunshine Duration in Paso Robles: December Highlighted

The December sunshine duration represents the total number of hours Paso Robles 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.
JanFebMarAprMayJunJulAugSepOctNovDec175h227h282h315h370h376h387h359h317h295h244h221h
Data source: Paso Robles December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Paso Robles During December

In Paso Robles, the likelihood of sunny weather takes a noticeable dip in December, with only a 47% chance of sunshine. This marks a significant contrast to the sun-drenched months from May through August, which boast probabilities soaring between 86% and 88%. As the year winds down, the trend reveals a gradual decline in sunny days, starting from the peak months of summer and continuing through to winter. Notably, December’s warmth is overshadowed by higher chances of cloud cover, making it one of the sunniest months of the year a distant memory. As residents and visitors look forward to the holiday season, they may have to adjust their expectations for golden rays and instead embrace a cozy, overcast December.

Percentage of Sunny Days in December in Paso Robles

The chart illustrates the percentage of sunny days in Paso Robles 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 Paso Robles experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec53%65%59%66%86%86%81%88%83%69%67%47%
Data source: Paso Robles December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Paso Robles in December

December in Paso Robles marks the transition into shorter days, with daylight lasting only 9 hours. This decline is part of a broader trend where daylight gradually decreases from a peak of 14 hours in the summer months of May through July. As the year progresses towards winter, daylight diminishes, dropping from 10 hours in January and February to its lowest point in December. This shift not only influences the natural lighting but also sets the stage for the festive glow of the holiday season, as residents embrace the coziness of longer evenings and the charm of seasonal celebrations.

Average Daylight Hours in Paso Robles for December

The chart illustrates the variation in daylight duration in Paso Robles throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 2m10h 54m11h 59m13h 7m14h 3m14h 30m14h 15m13h 25m12h 20m11h 13m10h 15m9h 46m
Data source: Paso Robles daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Paso Robles

In December, the winds in Paso Robles pick up slightly, with an average wind speed of 2.2 m/s (5 mph), mirroring the breezy essence of the fall months. As the year winds down, this gentle increase feels refreshing against the cooler winter air, marking a transition from the relatively calm summer months with their lowest winds, particularly in August and September. This seasonal shift is a reminder that while winter settles in, the character of Paso Robles remains vibrant, with a whisper of wind that enhances the charm of this picturesque locale. Overall, the wind patterns throughout the year show a consistent mildness, making Paso Robles an inviting destination for those seeking tranquility amid nature's beauty.

Average December Wind Speed in Paso Robles

The chart displays monthly wind speed patterns in Paso Robles, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.32.12.12.12.32.11.91.71.62.21.92.2 m/s
Data source: Paso Robles December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Paso Robles Compares to Other Months

The weather in Paso Robles 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 Paso Robles and find detailed weather information for every month.

In December, the weather in Paso Robles features a temperature range from a minimum of -2°C (29°F) to a maximum of 25°C (78°F), with an average temperature of 10°C (49°F). The month experiences about 59 mm (2.3 in) of precipitation over six days and maintains a humidity level of 76%. In contrast, January sees a slight shift in temperature, with the average staying at 10°C (50°F) but a maximum of 23°C (74°F). This month is wetter, with 89 mm (3.5 in) of precipitation also over six days, while humidity rises to 80%. For more details, you can check Paso Robles weather in January.

In December, temperatures range from a chilly -2°C (29°F) at their lowest to a warm 25°C (78°F) at their highest, with an average of 10°C (49°F). The month sees about 59 mm (2.3 in) of precipitation over 6 days, resulting in a humidity level of 76%. In contrast, February experiences slightly colder mornings with a minimum of -3°C (27°F), but the average temperature remains the same at 10°C (51°F) and peaks at 26°C (79°F). Precipitation increases to 63 mm (2.5 in) spread over 7 days, contributing to a higher humidity of 83%. Overall, February is a little wetter and more humid than December. For more details, check out Paso Robles weather in February.

In December, the weather in Paso Robles features a range of temperatures from a chilly -2°C (29°F) at night to a comfortable 25°C (78°F) during the day, with an average temperature of 10°C (49°F). The month sees around 59 mm (2.3 in) of precipitation over six days, and humidity levels hover around 76%. In contrast, March brings slightly warmer conditions, with minimum temperatures at 0°C (32°F) and maximums reaching 27°C (82°F), averaging 12°C (53°F). Precipitation increases to 72 mm (2.8 in) over eight days, and humidity rises to 80%. For more details on March weather, check out Paso Robles weather in March.

December and April present contrasting weather patterns, with December featuring cooler temperatures and higher precipitation. In December, the minimum temperatures can drop to -2°C (29°F), while the average hovers around 10°C (49°F) and can reach a maximum of 25°C (78°F). This month typically experiences about 59 mm (2.3 in) of precipitation over six days, contributing to a rather damp atmosphere with humidity levels at 76%. In contrast, April brings milder conditions, with minimum temperatures starting at 3°C (37°F) and averaging 15°C (59°F), reaching highs of 33°C (91°F). April also enjoys significantly lower rainfall, averaging only 19 mm (0.7 in) over three days, while humidity remains steady at 76%. For more specific details about the weather in April, you can visit Paso Robles weather in April.

December's weather offers a wider temperature range, with minimums dipping to -2°C (29°F) and maximums reaching up to 25°C (78°F). This month sees an average temperature of 10°C (49°F) and experiences a fair amount of precipitation, totaling 59 mm (2.3 in) over approximately six days, while maintaining a humidity level of 76%. In contrast, May brings milder conditions with a minimum temperature of 5°C (41°F) and an average of 17°C (63°F), peaking at a warm 33°C (92°F). Precipitation drops significantly in May to just 10 mm (0.4 in) over two days, with humidity remaining relatively stable at 75%. For a more detailed look at the weather during this month, you can visit Paso Robles weather in May.

December and June present contrasting weather experiences. In December, temperatures range from a chilly minimum of -2°C (29°F) to a pleasant maximum of 25°C (78°F), accompanied by an average temperature of 10°C (49°F). This month sees about 59 mm (2.3 in) of precipitation over six days, resulting in a humidity level of 76%. In sharp contrast, June offers significantly warmer temperatures, with a minimum of 8°C (47°F), an average of 21°C (69°F), and a maximum soaring to 37°C (99°F). Remarkably, June boasts zero precipitation and no rainy days, along with a slightly lower humidity of 74%. For more details, check out Paso Robles weather in June.

In December, Paso Robles experiences much cooler temperatures, with minimums dipping to -2°C (29°F) and a comfortable average of 10°C (49°F). There is also a notable amount of precipitation, averaging 59 mm (2.3 inches) over six days, resulting in a relatively humid environment at 76%. In sharp contrast, July boasts significantly warmer conditions, with minimums around 12°C (53°F) and soaring maximums reaching up to 39°C (102°F). Notably, July is characterized by complete dryness, with no recorded precipitation and a similar humidity level of 75%. For a detailed overview of the weather in July, visit Paso Robles weather in July.

When comparing the weather in December and August, the differences are quite pronounced. December experiences a wide range of temperatures, with a minimum of -2°C (29°F) and a maximum of 25°C (78°F), averaging around 10°C (49°F). It also sees about 59 mm (2.3 in) of precipitation over approximately six days, accompanied by high humidity levels at 76%. In contrast, August boasts much warmer conditions, with temperatures ranging from a minimum of 13°C (55°F) to a scorching maximum of 39°C (103°F), and an average temperature of 22°C (72°F). Interestingly, August is characterized by zero precipitation and lower humidity at 72%. For a detailed look at the weather in August, check out Paso Robles weather in August.

When comparing the weather in December and September, notable differences emerge. December experiences a broader temperature range with minimums hitting -2°C (29°F) and maximums reaching up to 25°C (78°F), while the average temperature is around 10°C (49°F). It also tends to be wetter, with 59 mm (2.3 inches) of precipitation over six days and a higher humidity level of 76%. In contrast, September boasts milder conditions, characterized by minimum temperatures of 8°C (46°F) and maximums soaring to 40°C (104°F), resulting in an average temperature of 21°C (70°F). Remarkably, September sees negligible precipitation of just 1 mm (0.0 inches) and no rainy days, along with slightly lower humidity at 70%. For more detailed insights into September weather, check out Paso Robles weather in September.

In comparing the weather between December and October, December presents a much cooler climate, with temperatures ranging from a minimum of -2°C (29°F) to a maximum of 25°C (78°F), and an average of 10°C (49°F). In contrast, October boasts milder conditions, featuring a minimum of 5°C (41°F) and soaring daytime highs of up to 35°C (95°F), with an average of 17°C (64°F). Additionally, December is noticeably wetter, receiving 59 mm (2.3 in) of precipitation over six days, while October remains dry, with only 7 mm (0.3 in) of rain across the month and no rainy days. The humidity levels also differ slightly, with December at 76% and October at 70%. For more detailed insights into October weather, you can visit Paso Robles weather in October.

In December, temperatures in Paso Robles show a wider range, with a minimum of -2°C (29°F) and a maximum of 25°C (78°F), compared to November's milder range of 0°C (32°F) to 27°C (81°F). While both months experience relatively high average temperatures—10°C (49°F) in December and 13°C (56°F) in November—December is slightly cooler overall. Additionally, December sees increased precipitation, totaling 59 mm (2.3 in) over 6 days, while November has only 25 mm (1.0 in) over 2 days, indicating that December is generally wetter. Humidity remains comparable, with 76% in December and 74% in November. For more detailed insights, visit Paso Robles weather in November.

Compare Paso Robles's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Paso Robles

As December settles over Paso Robles, the region experiences a noticeable shift in climate compared to the warmer months. Cooler temperatures prevail, with average highs and lows creating a crisp atmosphere, and the occasional chill can even bring nighttime temperatures near freezing. This month also brings a touch more moisture, with increased precipitation that often sweeps through the area, making it one of the rainier times of the year. The humidity lingers around a comfortable level, contributing to the rich, vibrant landscape that characterizes winter in Paso Robles. For those interested in the seasonal transitions of this beautiful region, the nuances of December weather offer a captivating counterpoint to the sun-soaked summers. Discover more about the year's overall Paso Robles Climate for a comprehensive understanding of what each season has in store.