Last updated: February 24, 2025
In July, San Luis Obispo experiences warm and delightful weather, with a maximum temperature reaching up to 31°C (89°F) and an average of 18°C (64°F). Visitors can enjoy clear skies, as the precipitation is notably low at just 1 mm (0.0 in) and 0 rainy days throughout the month. The air holds a comfortable humidity level of 75%, making it an ideal time to explore the charming surroundings and outdoor attractions. Whether you’re hiking in the nearby hills or savoring local cuisine, July promises an inviting climate for all.
In July, San Luis Obispo embraces the height of summer with delightful temperatures that encapsulate the region's warm charm. The month features a minimum of 12°C (55°F), offering comfortable evenings, while the average temperature hovers around a pleasant 18°C (64°F). The maximum reaches a striking 31°C (89°F), making it one of the warmest times of the year. This trend of rising temperatures from earlier months culminates in July's consistent warmth, ideal for outdoor activities and enjoying the vibrant local culture. As the summer sun graces the city, residents and visitors alike relish the balanced mix of heat and refreshing breezes, truly embodying the quintessential Californian summer experience.
In San Luis Obispo, July marks a continuation of the region's dry spell, with precipitation recorded at a mere 1 mm (0.0 in) and no rainfall days throughout the month. This minimal rainfall is consistent with the trend seen from June, where only a trace amount of moisture was logged. As the summer months progress, the city experiences a significant decline in precipitation, starkly contrasting the robust rainfall seen earlier in the year, such as 110 mm (4.3 in) in January. This extended dry period highlights the region's characteristic Mediterranean climate, where warm and dry summers are the norm, setting the stage for the lush green landscapes that flourish once the autumn rains return.
In July, San Luis Obispo experiences a notable humidity level of 75%, which reflects a slight dip from the previous month's 74%. This midsummer humidity is part of a broader trend in the region, where humidity peaks in the early months of the year, averaging around 80% in January and March, before gradually decreasing as summer unfolds. By late summer, particularly in August, humidity drops to its lowest point at 72%, suggesting a shift towards drier conditions. Overall, the slight summer decrease in humidity contributes to the area's charming coastal climate, providing a comfortable environment even amidst rising temperatures.
In July, San Luis Obispo experiences an extreme UV Index of 12, indicating that sun exposure can lead to skin damage in as little as 10 minutes. This peak in UV intensity follows a rising trend throughout the summer months, beginning with a moderate index of 4 in January and soaring to 10 in May. As summer rolls in, both June and July maintain this heightened level, showcasing a significant uptick that emphasizes the importance of sun safety during this period. Following July, the UV Index slightly decreases in August but remains high at 11, before tapering off in fall. For continuous updates and tips on managing sun exposure, check out the detailed information available at San Luis Obispo UV Index.
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In July, San Luis Obispo basks in the glory of sunshine with a remarkable 383 hours of radiant light, marking it as the sunniest month of the year. This peak in sunlight follows a steady ascent from the beginning of the year, where January starts off with a modest 179 hours. Each month builds upon the last, culminating in a glorious summer display that invites locals and visitors alike to enjoy the outdoors. As the summer progresses into August, the hours slightly decrease to 358, yet the warmth and vibrancy of the season linger. This trend showcases San Luis Obispo's appealing climate, making it a fantastic destination for those seeking sunny adventures.
In July, San Luis Obispo enjoys a 64% chance of sunshine, making it a delightful time for outdoor activities. While this figure is lower than the peak sunny months of May (72%) and June (73%), it still showcases a healthy likelihood of sunny weather typical of the summer season. Interestingly, as the year progresses from January's modest 53% to the summer months, the trend clearly shifts toward brighter skies. The sunny conditions remain fairly consistent into August at 71%, maintaining that sun-drenched charm that makes San Luis Obispo a popular summer destination.
In San Luis Obispo, July shines bright with 14 hours of daylight, holding steady with the previous month of June. This mid-summer month continues the trend of prolonged daylight that began in April, where the hours gradually increased as spring transitioned into summer. As the year progresses, daylight gradually declines, starting in August with a slight drop to 13 hours. This pattern reveals a clear seasonal rhythm, highlighting San Luis Obispo's longest days during the summer months, fostering vibrant outdoor activities and longer evenings to enjoy the coastal beauty. As the year wanes, the return to shorter days begins, culminating in only 9 hours by December, showcasing the dynamic interplay of sunlight throughout the seasons.
In July, wind in San Luis Obispo experiences a notable dip, with an average speed of just 2.2 m/s (5 mph), marking the lowest point of the year. This gentle breeze contrasts sharply with the more energetic gusts of the early months, where averages hover around 3.3 m/s. The trend becomes more pronounced as we transition from June, where winds still maintain a moderate 2.8 m/s (6 mph), to the quieter July and August months, both at 2.1 m/s (5 mph). This summer lull contributes to the mild coastal climate, making July a delightful time for outdoor activities, despite the waning winds. Overall, the gradual decline from spring to summer highlights a calming shift in the region's wind patterns, fostering a serene atmosphere perfect for enjoying the beautiful surroundings.
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 July'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.
July and January exhibit stark contrasts in weather conditions. July typically enjoys warm temperatures, ranging from a minimum of 12°C (55°F) to a maximum of 31°C (89°F), with an average of 18°C (64°F) and almost no precipitation, making it a dry month with just 1 mm of rain. In contrast, January sees cooler temperatures, with lows of 4°C (40°F) and highs reaching 23°C (74°F), averaging at 12°C (54°F). This month experiences significantly more rainfall, totaling 110 mm (4.3 in) over about 6 days, and humidity levels remain relatively high at 80%. For a more detailed look at January weather, check out San Luis Obispo weather in January.
July and February present stark contrasts in weather patterns. In July, temperatures range from a mild 12°C (55°F) to a warm 31°C (89°F), with a low chance of rain, seeing only 1 mm of precipitation over the course of the month. This results in relatively high humidity at 75%, but the summer sun dominates the landscape. In contrast, February experiences cooler temperatures, with a minimum of 4°C (39°F) and a maximum of 25°C (77°F), and is characterized by significantly higher precipitation levels, totaling 80 mm (3.2 in) over about 6 days. The humidity also slightly increases to 83%, adding to the chill in the air. For more details on February’s weather, you can check out San Luis Obispo weather in February.
In comparing the weather of July and March, July boasts significantly warmer temperatures, with a minimum of 12°C (55°F) and a maximum reaching up to 31°C (89°F). In contrast, March experiences cooler conditions, with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 24°C (76°F). Precipitation levels also differ greatly, as July sees almost no rainfall with just 1 mm (0.0 in) recorded over 0 days, while March receives substantial rainfall of 84 mm (3.3 in) across 9 days. Additionally, humidity remains relatively high in both months, at 75% in July and 80% in March. For a more detailed look at the specific weather conditions for March, you can explore San Luis Obispo weather in March.
In comparison to April, July experiences significantly warmer temperatures, with a minimum of 12°C (55°F) and an average of 18°C (64°F), peaking at a maximum of 31°C (89°F). In contrast, April's temperatures range from a minimum of 7°C (44°F) and an average of 14°C (57°F) to a maximum of 26°C (80°F). Additionally, July boasts nearly dry conditions with only 1 mm of precipitation over the month and no rainy days, while April sees more precipitation at 23 mm (0.9 in) spread over three days. Humidity levels remain fairly similar, with July at 75% and April at 76%. For more details on April weather, you can check San Luis Obispo weather in April.
In comparing the weather of July and May, July boasts warmer temperatures, with a minimum of 12°C (55°F) and an average of 18°C (64°F), reaching highs of 31°C (89°F). In contrast, May has cooler temperatures, starting at a minimum of 8°C (47°F) and averaging 15°C (59°F), peaking at 25°C (77°F). July is characterized by its dry conditions, experiencing only 1 mm of precipitation over no rainy days, while May sees more humidity and rainfall, with 12 mm over 2 days. Both months have a humidity level of 75%, but July clearly comes with more summer-like warmth compared to May's milder climate. For more details, you can check out San Luis Obispo weather in May.
In comparing the weather between June and July, July tends to be slightly warmer, with average temperatures rising from June's 16°C (62°F) to 18°C (64°F). Both months experience the same maximum temperature of 31°C (88°F) and minimal precipitation, with only 1 mm recorded and no rainy days noted in either month. Interestingly, July has a slightly higher humidity level at 75%, compared to June's 74%. For more detailed weather insights, you can check San Luis Obispo weather in June.
July and August in San Luis Obispo feature similar weather patterns, with both months experiencing a range of temperatures that peak at around 31°C (89°F) and 88°F, respectively. July sees a minimum temperature of 12°C (55°F) and an average of 18°C (64°F), while August has slightly higher minimum and average temperatures, with a minimum of 13°C (55°F) and an average of 18°C (65°F). Both months receive minimal precipitation, recording just 1 mm, and no rainy days, maintaining a pleasant, dry climate. Humidity levels are slightly higher in July at 75%, compared to August’s 72%. For a closer look at the weather specifics for August, you can visit San Luis Obispo weather in August.
In comparing the weather between July and September, both months exhibit similar average temperatures, around 18°C (64°F), but September can reach higher maximum temperatures of 35°C (95°F) compared to July's 31°C (89°F). Interestingly, both months experience very little precipitation, with just 1 mm recorded on 0 days. Humidity levels also differ slightly, with July feeling more humid at 75%, while September is slightly drier at 70%. For more detailed weather information, you can check San Luis Obispo weather in September.
In July, the weather is characterized by warmer temperatures, with an average of 18°C (64°F) and maximum highs reaching 31°C (89°F). The month sees minimal precipitation, with only 1 mm recorded and no rainy days, and a relatively high humidity of 75%. In contrast, October experiences slightly cooler conditions, featuring a minimum temperature of 9°C (49°F) and an average temperature similar to July at 17°C (64°F), but with a maximum of 33°C (92°F). Despite the warm highs, October has more precipitation at 10 mm, although still no rainy days, and a lower humidity level of 70%. For more details on October's weather specifics, check out San Luis Obispo weather in October.
In comparing the weather between July and November, July boasts warmer temperatures with a minimum of 12°C (55°F) and a maximum of 31°C (89°F), while November experiences cooler highs, peaking at 26°C (79°F) and a minimum of 6°C (42°F). July is characterized by its dry conditions with negligible precipitation and no rainy days, whereas November sees a noticeable increase in rainfall, totaling 32 mm (1.2 in) over three days. Despite November's cooler temperatures and added moisture, the humidity remains quite similar, hovering around 74-75%. For more detailed weather data, check out San Luis Obispo weather in November.
July and December present a striking contrast in weather conditions. In July, temperatures range from a mild 12°C (55°F) to a warm 31°C (89°F), with an average of 18°C (64°F), making it a dry month with virtually no precipitation and relatively high humidity at 75%. Conversely, December experiences cooler temperatures with a minimum of 5°C (42°F) and a maximum of 23°C (74°F), averaging at 12°C (54°F). This month is much wetter, receiving 76 mm (3.0 in) of precipitation over six days, while humidity remains similar at 76%. For more details on December weather, you can visit San Luis Obispo weather in December.
In July, San Luis Obispo basks in warm, sun-drenched days, marking a shift from the milder temperatures of earlier months. With an average temperature around 18°C and maximum highs reaching 31°C, the summer heat becomes a defining feature. Unlike the wetter months, July boasts virtually no precipitation and a notable decrease in humidity, allowing for comfortable outdoor activities against a backdrop of vibrant summer skies. This delightful weather invites both locals and visitors to embrace the charm of the season, making it a peak time for exploration. For a deeper dive into the yearly climate trends, check out San Luis Obispo Climate.