Last updated: February 24, 2025
December in Morro Bay, United States, presents a mild coastal climate that invites both locals and visitors to enjoy its natural beauty. With a maximum temperature reaching 23°C (74°F) and an average of 12°C (54°F), the weather remains quite pleasant. However, it can dip to a minimum of 5°C (42°F) during the cooler nights. Expect moderate rainfall, accumulating to 76 mm (3.0 in) over approximately 6 days, which contributes to the area’s lush scenery. The humidity levels hover around 76%, creating a refreshing coastal atmosphere that is perfect for exploring the stunning surroundings.
In Morro Bay, December ushers in a cool yet comfortable climate, with temperatures showcasing a gentle decline as winter approaches. The month typically sees minimum temperatures around 5°C (42°F), while the average hovers at a mild 12°C (54°F), allowing residents and visitors to enjoy outdoor activities without the chill of harsher winters. Maximum temperatures reach up to 23°C (74°F), suggesting pleasant afternoons ideal for exploring the scenic coastline. This transitional period reflects a broader trend in Morro Bay, where cooler months tend to maintain moderate weather, contrasting with the summer's heat. As the year closes, December's inviting temperatures create a serene atmosphere, perfect for soaking in the natural beauty of this coastal gem.
In Morro Bay, December marks the return of wetter weather as the region experiences a significant precipitation amount of 76 mm (3.0 inches) over 6 days. This rainfall is a noticeable increase compared to the drier summer months where precipitation plummeted to virtually zero. As the year winds down, December's precipitation serves as a reminder of the typical coastal climate, balancing out the preceding months of minimal rainfall, particularly June through October. With November's slight uptick to 32 mm (1.2 inches), December's totals echo a gradual transition towards the wet season, preparing the land for the bountiful rains of January ahead.
In Morro Bay, December experiences a slight uptick in humidity, settling at 76%, following a trend of mild fluctuations throughout the year. After peaking in February at 83%, humidity gradually decreases as the seasons change, reaching its lowest point of 70% in both September and October. As the year winds down, the levels rise slightly, moving from the lower 70s back into the mid 70s by November and December. This trend showcases a pattern of seasonal variation, where the coastal climate remains relatively moist, especially in the winter months, providing a refreshing ambiance that characterizes the region.
As December rolls into Morro Bay, the UV Index dips to 3, categorizing exposure as moderate, with a burn time of 30 minutes. This marks a notable decrease from the peak levels observed in the summer months, where the index soared to extremes of 12 in June and July, demanding protective measures within just 10 minutes of sun exposure. The gradual decline from late fall's 5 indicates a shift toward safer sun conditions, making December a more forgiving month for outdoor activities. With its overall mild UV profile, December provides the perfect opportunity to enjoy the scenic beauty of Morro Bay while being mindful of your skin health. For more details on the year-round UV trends in this beautiful locale, visit Morro Bay UV Index.
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December in Morro Bay welcomes the onset of winter with 223 hours of sunshine, offering a delightful contrast to colder climates. While this marks a dip from the preceding sunnier months, it's part of a larger trend where the year peaks in summer, characterized by an impressive 383 hours in July. As the months transition from the abundant light of spring and summer, you can see a gradual decline, starting from the vibrant 368 hours in May down to December’s figures. Despite the decrease, the sunny days still provide a refreshing escape, allowing residents and visitors alike to bask in the warm glow of the sun even as the year comes to a close.
In Morro Bay, December heralds a noticeable dip in sunshine, with only a 49% chance of sunny weather. This is a stark contrast to the sunnier months earlier in the year, where the likelihood peaks with 72% in May and 73% in June. Following this vibrant spring and early summer, the trend shows a gradual decline in sunny days, culminating in December’s relatively gloomy outlook. As the year winds down, it seems that the coastal charm of Morro Bay is cloaked in more cloud cover, inviting visitors to enjoy the unique beauty of the area even during its sun-scarcer days.
In December, Morro Bay experiences a downturn in daylight, with only 9 hours of sunlight illuminating the coastal landscape. This reduction marks the culmination of a seasonal trend, where the year begins with consistent daylight hours that remain fairly stable at 10 hours through January and February. As spring emerges in March, daylight gradually extends to 11 hours, reaching a peak in the summer months of June, July, and August, each offering a generous 14 hours of daylight. However, as autumn settles in, the days shorten again, leading to 12 hours in September, gradually diminishing to 10 hours in November and then the shortest period of the year in December. This cyclical pattern reflects the natural rhythm of time in Morro Bay, inviting both residents and visitors to embrace the cozy charm of winter days.
As December arrives in Morro Bay, the average wind speed registers at 3.1 m/s (7 mph), reflecting a slight uptick from the calmer breezes of the late summer and early fall months. Following a gradual decline in wind speed from July's gentle 2.2 m/s (5 mph) to November's steady 2.9 m/s (7 mph), December’s winds signal a shift towards more invigorating conditions. This trend of increasing wind as the year wraps up hints at the seasonal changes that often bring a refreshing chill to the coastal air, making it a cozy time for locals and visitors alike to enjoy the scenic beauty of this picturesque seaside town. The transition from the stillness of summer to the briskness of winter encapsulates Morro Bay's dynamic coastal climate, perfect for adventurers seeking both tranquility and invigorating outdoor experiences.
The weather in Morro Bay 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 Morro Bay and find detailed weather information for every month.
In December, the weather features a temperature range from a minimum of 5°C (42°F) to a maximum of 23°C (74°F), with an average temperature of 12°C (54°F). Precipitation is moderate at 76 mm (3.0 in) over 6 days, and humidity is around 76%. In contrast, January sees a slight drop in minimum temperature to 4°C (40°F), while the average and maximum temperatures remain the same. However, January experiences increased precipitation at 110 mm (4.3 in) over the same number of rainy days, and humidity rises to 80%. For more insights into January weather, you can check Morro Bay weather in January.
In comparing the weather of December and February, we find that both months have a similar average temperature of 12°C (54°F), although February sees a slightly higher maximum temperature at 25°C (77°F) compared to December’s 23°C (74°F). The minimum temperature in December is marginally warmer at 5°C (42°F), while February's minimum dips to 4°C (39°F). Both months experience similar precipitation levels, with December averaging 76 mm (3.0 in) and February slightly higher at 80 mm (3.2 in), and both have precipitation on approximately 6 days. However, February has a higher humidity level at 83%, compared to December’s 76%, making it feel more humid towards the end of winter. For more details on February's climate, check out Morro Bay weather in February.
December and March both feature mild temperatures, with December having a minimum of 5°C (42°F) and an average of 12°C (54°F), while March sees slightly higher averages with a minimum of 5°C (41°F) and an average of 13°C (55°F). The maximum temperatures in both months are quite similar, with December reaching 23°C (74°F) and March peaking at 24°C (76°F). Precipitation in March is slightly higher at 84 mm (3.3 in) over 9 days, compared to December's 76 mm (3.0 in) across 6 days, contributing to a marginally wetter climate as humidity also increases from 76% in December to 80% in March. For more details on weather patterns in March, check out Morro Bay weather in March.
In December, the weather features a minimum temperature of 5°C (42°F) and can reach a maximum of 23°C (74°F), with an average of 12°C (54°F). It experiences a higher level of precipitation, totaling 76 mm (3.0 in) over about 6 days, while maintaining a humidity level of 76%. In contrast, April tends to be slightly warmer, with temperatures ranging from a minimum of 7°C (44°F) to a maximum of 26°C (80°F), averaging 14°C (57°F). This month enjoys significantly less rainfall, only 23 mm (0.9 in) over approximately 3 days, yet also maintains the same humidity level of 76%. For more details on April weather, visit Morro Bay weather in April.
December weather features a mild temperature range, with minimums around 5°C (42°F) and maximums peaking at 23°C (74°F). The month sees an average temperature of 12°C (54°F) and experiences 76 mm (3.0 in) of precipitation over six days, leading to a humidity level of 76%. In contrast, May offers slightly warmer temperatures, with minimums at 8°C (47°F) and maximums reaching 25°C (77°F), resulting in an average of 15°C (59°F). Precipitation is significantly lower in May, at just 12 mm (0.5 in) over two days, and humidity remains comparable at 75%. For more detailed information, check out Morro Bay weather in May.
December and June present contrasting weather patterns, with December featuring cooler temperatures ranging from a minimum of 5°C (42°F) to a maximum of 23°C (74°F), and an average of 12°C (54°F). In addition, December experiences more precipitation, totaling 76 mm (3.0 in) over 6 days, leading to a higher humidity level of 76%. In contrast, June enjoys warmer temperatures, with a minimum of 11°C (51°F), an average of 16°C (62°F), and a peak of 31°C (88°F). Remarkably, June has incredibly low precipitation, accumulating just 1 mm (0.0 in) over the month with no rainy days, contributing to a slightly lower humidity of 74%. For more details on weather during this time, visit Morro Bay weather in June.
In December, the weather tends to be cooler with temperatures ranging from a minimum of 5°C (42°F) to a maximum of 23°C (74°F), resulting in an average temperature of 12°C (54°F). This month also experiences more precipitation, with about 76 mm (3.0 in) falling over six days, contributing to a higher humidity level of 76%. In contrast, July boasts warmer temperatures, with a minimum of 12°C (55°F) and a maximum of 31°C (89°F), averaging 18°C (64°F). Notably, July features much less rainfall, recording only 1 mm (0.0 in) over the entire month, and maintains a similar humidity level of 75%. For more details on what to expect, check out Morro Bay weather in July.
In comparing the weather between December and August, it’s clear that August is significantly warmer and drier. December sees temperatures ranging from a chilly minimum of 5°C (42°F) to a comfortable average of 12°C (54°F), with a maximum of 23°C (74°F). In contrast, August boasts a higher minimum temperature of 13°C (55°F) and an average temperature of 18°C (65°F), peaking at a warm 31°C (88°F). Additionally, August enjoys almost no precipitation, with only 1 mm recorded, while December experiences much more rainfall, totaling 76 mm over six days. Humidity levels are also lower in August at 72%, compared to December's 76%. For more details, check out the weather trends at Morro Bay weather in August.
December and September present distinctly different weather patterns. In December, temperatures range from a minimum of 5°C (42°F) to a maximum of 23°C (74°F), with an average of 12°C (54°F), characterized by higher humidity at 76% and notable precipitation of 76 mm over six days. In contrast, September boasts more warmth, with minimum temperatures of 11°C (53°F), maximums reaching up to 35°C (95°F), and an average of 18°C (65°F). This month is virtually dry, experiencing only 1 mm of precipitation over zero rainy days and slightly lower humidity at 70%. For more detailed weather insights, you can check Morro Bay weather in September.
When comparing the weather in December to that in October, significant differences emerge. December tends to be cooler, with average temperatures ranging from a minimum of 5°C (42°F) to a maximum of 23°C (74°F), while October enjoys warmer conditions, with temperatures ranging from 9°C (49°F) to a high of 33°C (92°F). Additionally, December experiences more precipitation, averaging 76 mm (3.0 in) over six days, compared to the dry conditions in October, which records only 10 mm (0.4 in) with no rainy days. Humidity levels are slightly higher in December at 76%, compared to 70% in October. For more detailed insights, you can check Morro Bay weather in October.
When comparing the weather in December to that of November, we see notable differences in temperature and precipitation. In December, the minimum temperature averages 5°C (42°F), while November is slightly warmer with a minimum of 6°C (42°F). The average temperature for December is around 12°C (54°F), which is cooler compared to November's average of 15°C (59°F). Additionally, December experiences more rainfall, totaling 76 mm (3.0 in) over six days, whereas November has only 32 mm (1.2 in) of precipitation across three days. Humidity levels remain somewhat consistent between the two months, with December at 76% and November at 74%. For a deeper insight into weather specifics during November, you can check Morro Bay weather in November.
In December, Morro Bay experiences a significant shift in weather compared to the milder months of autumn. Temperatures dip, averaging around 12°C (54°F), making it one of the cooler months of the year. While daytime highs can reach a pleasant 23°C (74°F), the nights can be quite chilly, dropping to around 5°C (42°F). This month also brings increased precipitation, with approximately 76 mm (3.0 in) of rain over about 6 days, contributing to a higher humidity level of 76%. As winter settles in, December offers a unique climate experience that highlights the coastal charm of Morro Bay, making it a great time to explore the area's stunning natural beauty. For a comprehensive review of the weather throughout the year, check out Morro Bay Climate.