Last updated: February 24, 2025
August in San Luis Obispo showcases warm and inviting weather, with maximum temperatures reaching a balmy 31°C (88°F). The average temperature hovers around a comfortable 18°C (65°F), while the nights offer a refreshing dip to a mild 13°C (55°F). Remarkably, this month sees virtually no rain, with a mere 1 mm (0.0 in) of precipitation recorded, making it an ideal time for outdoor activities. With humidity levels at 72%, visitors can enjoy the sun-drenched landscapes without the burden of heavy rainfall, capturing the essence of a quintessential Californian summer.
In August, San Luis Obispo enjoys warm weather that reflects the height of summer, where temperatures range from a minimum of 13°C (55°F) to a maximum of 31°C (88°F). The average temperature settles at a comfortable 18°C (65°F), making it an ideal time for outdoor activities and exploration. Notably, August shares its high max temperature with July, indicating a steady warmth in the summer months. As summer winds down, the temperatures begin to trend slightly lower in September, highlighting a gradual transition towards fall. This consistent warmth, combined with the charming coastal vibes, offers a perfect backdrop for both residents and visitors to savor the season before autumn sets in.
In August, San Luis Obispo experiences its driest conditions of the year, with precipitation measuring just 1 mm (0.0 in) across the month. This is consistent with the trend of minimal rainfall seen in the summer months, as both July and August record zero rainy days. Following a robust winter, where January peaks with 110 mm (4.3 in) of rain, the region gradually transitions into a parched summer, culminating in these arid August days. Interestingly, this pattern of limited precipitation continues into September, reinforcing the notion of a dry late summer in this coastal locale. As the year progresses toward the wetter months, the contrast becomes even more pronounced, making every drop in late autumn feel much more significant.
In August, San Luis Obispo experiences a drop in humidity to 72%, marking the end of summer on a more comfortable note. This trend towards lower humidity is consistent with the gradual decrease seen throughout the late spring and summer months, where June and July maintain similar levels around 74-75%. As the year progresses, humidity tends to decline further into the early fall, with September recording the lowest levels at 70%. This seasonal shift not only enhances the charming coastal climate but also makes August a delightful time for outdoor activities, as residents and visitors alike can enjoy the warm temperatures without the oppressive stickiness often associated with higher humidity.
In August, San Luis Obispo experiences a UV Index of 11, categorized as extreme, with a rapid burn time of just 10 minutes. This peak follows a trend of increasing UV levels from the late spring months, where June and July also recorded extreme indices of 12. As summer unfolds, the UV Index intensifies, highlighting the importance of sun protection during this period. With the sun’s potency, visitors and residents alike should remain vigilant in safeguarding their skin. The UV Index then begins to taper off in September, signaling a gradual decline into the milder autumn months. For those interested in understanding sun exposure better, details can be found at San Luis Obispo UV Index.
UV Risk Categories
August in San Luis Obispo basks in a remarkable 358 hours of sunshine, making it one of the sunniest months of the year. This vibrant summer month follows July, which boasts the highest sunshine hours at 383 hours, demonstrating a slight decline as summer transitions to early fall. The sun-drenched days of August still comfortably surpass earlier months, with 316 hours in September showing a notable decrease but still offering plenty of warmth before autumn settles in. Overall, the data reflects a clear upward trend in daylight hours from January through July, peaking in mid-summer and tapering off as the year winds down, highlighting the region's appealing climate for sun-seekers.
In August, San Luis Obispo enjoys a promising 71% chance of sunny weather, continuing the trend of pleasant summer days. This month falls just slightly below the peak of June's 73%, but it remains well above the earlier months of the year, showcasing the region's characteristic warm climate. With a notable increase from January's chilly 53%, August offers a delightful contrast, inviting locals and visitors alike to bask in the sunshine. As the summer progresses, the likelihood of clear skies tends to stabilize, providing a perfect backdrop for outdoor activities and events throughout the month.
In August, San Luis Obispo enjoys a generous 13 hours of daylight, marking a slight decline from the peak of 14 hours seen in the summer months of June and July. This gradual decrease heralds the approach of fall, as daylight continues to wane into September. The trend showcases a beautiful transition where long summer days begin to give way to the cozy, shorter days of autumn. Despite this reduction, August still offers ample sunlight, perfect for outdoor activities and basking in the vibrant California landscape before the days grow shorter.
In August, San Luis Obispo experiences its calmest winds of the year, with an average speed of just 2.1 m/s (5 mph), mirroring the gentle breezes of September as well. This period marks a noticeable drop from the slightly brisker winds of earlier months, such as January and April, which hover around 3.3 m/s (7 mph). The trend indicates a gradual decline in wind strength as summer progresses, reaching its lowest point in the late summer and early fall. This tranquil climate invites residents and visitors alike to savor the warmth and scenic beauty of the region, making it an ideal time for leisurely outdoor activities.
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 August'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.
The weather in August is characterized by warmer temperatures, with a minimum of 13°C (55°F) and an average of 18°C (65°F), peaking at a maximum of 31°C (88°F). This month experiences minimal precipitation, with only 1 mm recorded over zero rainy days, and humidity levels around 72%. In contrast, January presents a much cooler climate, featuring a minimum temperature of 4°C (40°F) and an average of 12°C (54°F), with highs reaching 23°C (74°F). January is also significantly wetter, accumulating 110 mm of rainfall over six days and maintaining higher humidity levels of 80%. For more detailed insights, you can check San Luis Obispo weather in January.
August and February present a stark contrast in weather. In August, temperatures are notably warmer, with averages around 18°C (65°F) and highs reaching up to 31°C (88°F), accompanied by low humidity levels at 72% and virtually no precipitation. In contrast, February experiences cooler temperatures, averaging 12°C (54°F), with maximums of 25°C (77°F) and frequent rainfall, totaling around 80 mm (3.2 in) over six days. Additionally, February's humidity rises slightly to 83%. For more detailed information, check out San Luis Obispo weather in February.
August and March present contrasting weather patterns in terms of temperature and precipitation. August boasts a warmer climate with minimum temperatures around 13°C (55°F) and a maximum reaching 31°C (88°F), contributing to an average of 18°C (65°F). In stark contrast, March experiences cooler conditions, with minimums of 5°C (41°F) and maximums of 24°C (76°F), averaging 13°C (55°F). Additionally, while August remains dry with negligible precipitation, March sees a significant 84 mm (3.3 in) of rain over approximately nine days, leading to higher humidity levels of 80% compared to August's 72%. For a more detailed look at March weather, you can visit San Luis Obispo weather in March.
In August, the weather is generally warm and dry, with temperatures ranging from a minimum of 13°C (55°F) to a maximum of 31°C (88°F) and an average of 18°C (65°F). Notably, there is very little precipitation, averaging just 1 mm (0.0 in) across the month, keeping humidity at a comfortable 72%. In contrast, April experiences cooler temperatures, with minimums around 7°C (44°F) and maximums reaching 26°C (80°F), averaging 14°C (57°F). This month sees more rainfall, totaling 23 mm (0.9 in) over three days, and slightly higher humidity at 76%. For more specific insights, check out San Luis Obispo weather in April.
In comparing the weather in August and May, August tends to be significantly warmer, with temperatures ranging from a minimum of 13°C (55°F) to a maximum of 31°C (88°F) and an average of 18°C (65°F). In contrast, May experiences cooler temperatures, with a minimum of 8°C (47°F), an average of 15°C (59°F), and a maximum of 25°C (77°F). Additionally, August boasts drier conditions with just 1 mm of precipitation over the entire month, while May sees more rain with 12 mm over two days. Humidity levels are quite similar, with August at 72% and May at 75%. For more detailed insights into May's weather, you can check San Luis Obispo weather in May.
In comparing the weather between August and June, we see some notable similarities and differences. Both months experience a maximum temperature of 31°C (88°F), however, August tends to be warmer on average with an average temperature of 18°C (65°F) compared to June's 16°C (62°F). Interestingly, the minimum temperatures in August (13°C or 55°F) are slightly higher than those in June (11°C or 51°F), contributing to a warmer overall feel. Precipitation remains minimal for both months, with only 1 mm recorded and no rainfall days. Humidity levels are comparable, with August at 72% and June slightly higher at 74%. For more detailed information, you can check San Luis Obispo weather in June.
In comparing the weather of August and July, we notice that both months feature similar temperature ranges with August's minimum temperature at 13°C (55°F) and a maximum of 31°C (88°F), closely mirroring July's minimum of 12°C (55°F) and maximum of 31°C (89°F). The average temperatures are almost identical, with August sitting at 18°C (65°F) and July slightly lower at 18°C (64°F). Both months recorded minimal precipitation, with just 1 mm (0.0 in) and no rainy days, although August benefits from slightly lower humidity at 72% compared to July's 75%. For more detailed information on July's weather, visit San Luis Obispo weather in July.
August and September in San Luis Obispo showcase a similar average temperature of 18°C (65°F), though September experiences a slightly wider range with maximum temperatures reaching up to 35°C (95°F) compared to August's peak of 31°C (88°F). Both months are characterized by minimal precipitation, with no significant rainfall recorded, contributing to the region's dry conditions. Humidity levels remain comparable, with August at 72% and September slightly lower at 70%. For more detailed insights, check out San Luis Obispo weather in September.
In August, the weather tends to be warmer, with temperatures ranging from a minimum of 13°C (55°F) to a maximum of 31°C (88°F), and an average temperature of 18°C (65°F). The humidity is relatively high at 72%, but the month is quite dry, receiving only 1 mm of precipitation over zero days.
In contrast, October experiences slightly cooler temperatures, with a minimum of 9°C (49°F), an average of 17°C (64°F), and a higher maximum of 33°C (92°F). Although it remains dry with no days of precipitation, it does see a total of 10 mm (0.4 in) for the month while maintaining a similar level of humidity at 70%. For more detailed insights, you can check San Luis Obispo weather in October.
August and November present quite contrasting weather conditions. In August, temperatures range from a mild 13°C (55°F) at night to a warm maximum of 31°C (88°F) during the day, with minimal precipitation and an average humidity of 72%. In contrast, November brings cooler temperatures, with a minimum of 6°C (42°F) and a maximum of 26°C (79°F), accompanied by increased rainfall totaling 32 mm (1.2 in) over three days. Despite this difference in precipitation, humidity remains relatively similar at 74%. For more detailed insights, you can check San Luis Obispo weather in November.
August and December present contrasting weather conditions. In August, temperatures range from a minimum of 13°C (55°F) to a maximum of 31°C (88°F), with an average of 18°C (65°F) and virtually no precipitation. The humidity is relatively moderate at 72%, making it a warm and dry month. In contrast, December experiences cooler temperatures, with a minimum of 5°C (42°F), an average of 12°C (54°F), and a maximum of 23°C (74°F). This month also sees significant rainfall, totaling 76 mm (3.0 in) over six days, and humidity rises slightly to 76%. For more details, visit San Luis Obispo weather in December.
August in San Luis Obispo offers warm and inviting weather, setting it apart from the cooler and wetter months of the year. With maximum temperatures reaching a comfortable 31°C (88°F) and minimal precipitation, residents and visitors alike can enjoy sunny days with low humidity levels enhancing the experience. This month stands out for its dry conditions, characterizing it as a perfect time for outdoor adventures and exploring the stunning coastal landscapes. For more detailed insights into what you can expect throughout the year, check out San Luis Obispo Climate.