Last updated: February 24, 2025
In January, San Luis Obispo experiences mild temperatures, with daily highs reaching up to 23°C (74°F) and average lows around 4°C (40°F). The month's average temperature hovers near 12°C (54°F), providing a comfortable climate for outdoor activities. However, residents and visitors can expect about 110 mm (4.3 in) of precipitation over approximately 6 days, contributing to a relatively humid atmosphere with humidity levels at 80%. This combination of mild temperatures and occasional rain makes January a unique time to enjoy the beauty of San Luis Obispo's natural landscapes.
In San Luis Obispo, January temperatures create a gentle winter ambiance, with lows averaging around 4°C (40°F) and mild highs reaching up to 23°C (74°F). This month offers an average temperature of 12°C (54°F), setting a comfortable stage for outdoor activities under the Southern California sun. As the year transitions into February, temperatures remain steady, with similar min and average readings, but peaks can reach 25°C (77°F), hinting at an early spring. The gradual warming trend continues into March, where temperatures rise slightly more, showcasing a consistent pattern of mild days and cooler nights. This charm of San Luis Obispo’s winter gradually gives way to the warmer months, inviting visitors to enjoy the unique coastal climate year-round.
January marks a notably wet start to the year in San Luis Obispo, with an average precipitation of 110 mm (4.3 in) over just 6 days. This heavy rainfall sets the tone for the winter months, as February follows closely with 80 mm (3.2 in) of rain, while March sees a slight dip to 84 mm (3.3 in). The trend sharply decreases in April, where precipitation plummets to just 23 mm (0.9 in), heralding the onset of a predominantly dry season that stretches through the summer months, with June to September recording almost negligible rainfall. By October and November, the region experiences a minor uptick, but overall, the data illustrates a clear seasonal pattern: January's peak rainfall transitions into a dry landscape as the year progresses.
In January, San Luis Obispo experiences a humidity level of 80%, setting the stage for a cool and moist start to the year. This early winter month sees humidity slightly tapering off to 83% in February, signaling a brief peak before it returns to 80% in March. As spring approaches, a noticeable decline in humidity occurs, dropping to 76% in April and further decreasing to 75% in May. This trend continues into the summer, where humidity stabilizes around 74% to 75% from June to July. As we transition into the latter half of the year, humidity gradually decreases, reaching its lowest point at 70% from September to October. Overall, the data reveals a pronounced ebb and flow of humidity, with January ushering in a relatively high moisture level that sets a contrasting tone as the year progresses towards drier months.
In January, San Luis Obispo experiences a moderate UV Index of 4, indicating a burn time of 30 minutes for unprotected skin. As the months progress, the UV Index steadily rises, reaching 5 in February and escalating dramatically in the spring to 8 in March and 9 in April. By May, the UV Index peaks at 10, signifying very high exposure risks, which continue into the summer months with extreme levels of 12 in June and July. This trend suggests a clear seasonal shift, where the sun's intensity intensifies rapidly, necessitating more vigilant sun protection as the year advances. Even as temperatures begin to cool in October, the UV Index remains relatively high at 7 before tapering to a manageable level of 5 in November and finally dropping to 3 in December. For more detailed insights, check out San Luis Obispo UV Index.
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In January, San Luis Obispo basks in 179 hours of sunshine, a warm promise of the vibrant months ahead. As winter transitions into spring, the days gradually grow brighter, with February introducing an uplift to 229 hours. With March and April, the sun truly begins to flourish, culminating in a sunny 316 hours as vibrant blooms pepper the landscape. The summer months are nothing short of radiant, peaking in July with an impressive 383 hours, inviting locals and visitors alike to revel in sun-soaked adventures. As the year progresses, a gentle decline begins, but even December wraps up with a respectable 223 hours, ensuring that the sunshine in San Luis Obispo remains a cherished feature throughout the year. The steady rise and fall of hours reminds us that the sun’s embrace is a constant companion, linking each season in a beautiful cycle.
In January, San Luis Obispo experiences a 53% likelihood of sunny weather, which is relatively modest compared to the subsequent months. As February rolls in, this chance increases significantly to 69%, marking the start of a trend towards brighter days. The sunny disposition continues through March and April, with probabilities of 61% and 57%, respectively. By the time May arrives, the sunshine potential jumps to 72%, and it peaks in June at 73%. Interestingly, the warmth of summer maintains high expectations for sunshine, though it dips slightly during July and August, landing at 64% and 71%. As fall approaches, the chance of sun remains steady, hovering around 68% through October and November, before decreasing again to 49% in December. Overall, January may start the year with a less sunny outlook, but it's a precursor to the much brighter and warmer months ahead.
In January, San Luis Obispo experiences 10 hours of daylight, a duration that remains steady through February. As the seasons shift, daylight begins to extend in March, reaching 11 hours and peaking at a delightful 14 hours from May through July. This bright stretch signifies the region's sun-drenched summer, perfect for outdoor activities and exploration. As summer wanes, daylight gradually recedes, tapering to 13 hours in August and down to 10 hours in November, before dipping to its annual low of 9 hours in December. The cyclical pattern showcases a harmonious transition through the seasons, inviting both residents and visitors to revel in the sun's warmth during the longer days of spring and summer.
In January, San Luis Obispo greets the new year with a gentle average wind speed of 3.5 m/s (8 mph), making it one of the breezier months of the year. This early winter wind sets a lively tone that gradually softens as the months progress, dipping slightly to 3.3 m/s (7 mph) in February and remaining consistent through the spring with similar readings. As the summer unfolds, the winds wane, reaching their lowest point in July and August at 2.2 m/s (5 mph) and 2.1 m/s (5 mph), respectively. A subtle resurgence occurs in October, hinting at the cool air of fall, before stabilizing again towards the year’s end. Ultimately, January's wind serves as a refreshing reminder of the transition towards milder, calmer conditions as the seasons shift in this picturesque coastal city.
The weather in San Luis Obispo changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of January's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in San Luis Obispo and find detailed weather information for every month.
In comparing the weather between January and February, both months share a similar minimum temperature of around 4°C (39°F - 40°F) and an average temperature of 12°C (54°F). However, February tends to be slightly warmer, with a maximum temperature reaching up to 25°C (77°F), compared to January's 23°C (74°F). Precipitation in February is less, totaling 80 mm (3.2 in) over 6 days, while January sees a higher rainfall of 110 mm (4.3 in) over the same number of days. Humidity levels also increase slightly in February to 83%, compared to 80% in January. For more specific weather details, you can check San Luis Obispo weather in February.
In January, the weather is characterized by slightly cooler temperatures, with averages ranging from a minimum of 4°C (40°F) to a maximum of 23°C (74°F) and an average temperature of 12°C (54°F). The month experiences 110 mm (4.3 in) of precipitation over about 6 days, while humidity remains high at 80%.
By March, the temperatures rise slightly, with a minimum of 5°C (41°F) and a maximum of 24°C (76°F), yielding an average of 13°C (55°F). Precipitation decreases to 84 mm (3.3 in) spread over 9 days, but the humidity stays consistent at 80%. For more details about the weather, check out San Luis Obispo weather in March.
In January, the weather is typically cooler, with temperatures ranging from a minimum of 4°C (40°F) to a maximum of 23°C (74°F) and an average of 12°C (54°F). The month also experiences significant precipitation, averaging 110 mm (4.3 in) over six days, contributing to a high humidity level of 80%. In contrast, April sees a warmer climate, with temperatures rising to a minimum of 7°C (44°F) and reaching a maximum of 26°C (80°F), while the average temperature is around 14°C (57°F). April is much drier, with only 23 mm (0.9 in) of precipitation over three days and slightly lower humidity at 76%. For more specific details about the weather in San Luis Obispo during April, you can visit San Luis Obispo weather in April.
In January, the weather is noticeably cooler, with temperatures ranging from a minimum of 4°C (40°F) to a maximum of 23°C (74°F) and an average temperature of 12°C (54°F). Additionally, January experiences higher precipitation at 110 mm (4.3 in) over about six days, along with a humidity level of 80%. In contrast, May brings warmer temperatures with a minimum of 8°C (47°F), an average of 15°C (59°F), and a maximum of 25°C (77°F). Rainfall is minimal in May, totaling just 12 mm (0.5 in) and occurring over only two days, along with slightly lower humidity at 75%. For more detailed insights, check out San Luis Obispo weather in May.
In January, the weather tends to be significantly cooler with temperatures ranging from a minimum of 4°C (40°F) to a maximum of 23°C (74°F), averaging around 12°C (54°F). This month is also quite wet, receiving about 110 mm (4.3 in) of precipitation over approximately 6 days, alongside a high humidity level of 80%. In contrast, June brings much warmer weather, with temperatures starting at a minimum of 11°C (51°F) and peaking at 31°C (88°F), averaging 16°C (62°F). Notably, June is much drier, experiencing only 1 mm (0.0 in) of precipitation across the entire month, and humidity decreases to 74%. For more details, check out San Luis Obispo weather in June.
January and July present contrasting weather patterns, showcasing a significant seasonal shift. In January, temperatures range from a cool 4°C (40°F) to a mild high of 23°C (74°F), accompanied by an average of 110 mm (4.3 in) of rainfall over about six days, and a humidity level of 80%. In contrast, July boasts much warmer conditions with temperatures starting at 12°C (55°F) and soaring up to 31°C (89°F). Remarkably, July experiences minimal precipitation, with only 1 mm (0.0 in) over the month and no rainy days, while the humidity dips slightly to 75%. This clear distinction highlights the dry warmth of summer compared to the cooler, wetter winter months. For further details on July weather, you can visit San Luis Obispo weather in July.
The weather in January is characterized by cooler temperatures, with nightly lows around 4°C (40°F) and an average of 12°C (54°F), reaching a maximum of 23°C (74°F). It also experiences a considerable amount of precipitation, with about 110 mm (4.3 inches) over six days, along with a high humidity of 80%. In contrast, August offers significantly warmer conditions, featuring a minimum temperature of 13°C (55°F), an average of 18°C (65°F), and a peak of 31°C (88°F). August also enjoys dry weather, with only 1 mm (0.0 inches) of rain and no recorded rainy days, accompanied by lower humidity levels at 72%. For more details on what to expect in this summer month, check out San Luis Obispo weather in August.
In January, the weather is considerably cooler with average temperatures ranging from a minimum of 4°C (40°F) to a maximum of 23°C (74°F), along with significant rainfall of 110 mm over about six days. The humidity is quite high at 80%, contributing to a damp and chilly atmosphere. In contrast, September experiences much warmer conditions, with average temperatures ranging from a minimum of 11°C (53°F) to a maximum of 35°C (95°F). The month is marked by dry weather, with only 1 mm of rainfall and no rainy days, and a lower humidity level of 70%, making it a more comfortable time for outdoor activities. For more details, visit San Luis Obispo weather in September.
January and October exhibit notably different weather patterns. In January, temperatures range from a minimum of 4°C (40°F) to a maximum of 23°C (74°F), with an average of 12°C (54°F). This month is marked by higher precipitation, totaling 110 mm (4.3 in) over approximately 6 days, and a humidity level of 80%. In contrast, October showcases milder conditions, with a minimum temperature of 9°C (49°F) and a maximum reaching 33°C (92°F), averaging around 17°C (64°F). Moreover, October is characterized by significantly lower rainfall at just 10 mm (0.4 in), with no recorded rainy days, and a humidity level of 70%. For more insights on the weather in October, check out San Luis Obispo weather in October.
In January, the weather features a wider temperature range with minimums around 4°C (40°F) and maximums reaching 23°C (74°F), leading to an average of 12°C (54°F). The month is comparatively wetter, with total precipitation of 110 mm (4.3 in) spread over about six days and a higher humidity of 80%. In contrast, November brings milder temperatures, with minimums at 6°C (42°F) and maximums hitting 26°C (79°F), yielding an average of 15°C (59°F). It is also significantly drier, receiving only 32 mm (1.2 in) of rain over three days, and has a lower humidity level of 74%. For more detailed information, you can check San Luis Obispo weather in November.
January and December exhibit similar temperature ranges, with January showing a slight decrease in minimum temperatures, averaging around 4°C (40°F) compared to December’s 5°C (42°F). Both months share an average of 12°C (54°F) and a maximum of 23°C (74°F). However, January experiences more precipitation, totaling 110 mm (4.3 in) over 6 days, while December has 76 mm (3.0 in) with the same number of wet days. Additionally, January's humidity is somewhat higher at 80%, compared to December's 76%. For more detailed information, check out San Luis Obispo weather in December.
As winter wraps its chill around San Luis Obispo in January, the weather stands out with its comfortably mild temperatures and a notable increase in precipitation compared to other months. The average temperature tends to be cooler, with higher humidity levels adding a touch of briskness to the air. While the rainfall may dampen some outdoor plans, it nurtures the lush landscapes that define this vibrant region. This blend of weather elements makes January a unique period, perfect for cozying up indoors or enjoying the refreshing, rejuvenated scenery. For a deeper understanding of what to expect throughout the year, check out the detailed insights at San Luis Obispo Climate.